an elevator suspended by a cable is descending at constant velocity.part ahow many force vectors would be shown on a free-body diagram?how many force vectors would be shown on a free-body diagram?012345

Answers

Answer 1

Two force vectors would be shown on a free-body diagram for an elevator descending at a constant velocity: the gravitational force and the tension force in the cable.

What are the forces of the free body diagram?

In a free-body diagram, the forces acting on an object are represented as vectors pointing in the direction that the force is acting. When an elevator is suspended by a cable and is descending at a constant velocity, there are two main forces acting on the elevator:

gravity and tension.

Gravity is a force that acts downward on all objects and is equal to the mass of the object times the acceleration due to gravity (g). The force of gravity on an elevator can be represented as a downward-pointing vector.

The tension in the cable is the force exerted by the cable on the elevator that opposes the force of gravity. This force can be represented as an upward-pointing vector.

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Related Questions

In a certain binary-star system, each star has the same mass which is 2.4 times of that of the Sun, and they revolve about their center of mass. The distance between them is the 4.2 times the distance between Earth and the Sun. What is their period of revolution in years

Answers

The period of revolution in a binary-star system depends on the masses of the stars and the distance between them. In this case, we know that each star has a mass that is 2.4 times that of the Sun, and they are separated by a distance that is 4.2 times the distance between Earth and the Sun.



To calculate their period of revolution, we can use Kepler's third law, which states that the square of the period of revolution is proportional to the cube of the average distance between the stars, Therefore, the period of revolution for the two stars in this binary-star system is approximately 32.1 years, To find the period of revolution of a binary-star system, we can use Kepler's Third Law, which relates the period of revolution (T) to the semi-major axis (a) and the total mass of the system (M). The formula for Kepler's Third Law is:

T^2 = (4π^2 * a^3) / (G * M)

where:
- T is the period of revolution
- a is the semi-major axis (distance between the stars)
- G is the gravitational constant (6.67430 x 10^-11 m^3 kg^-1 s^-2)
- M is the total mass of the system

In this case, the mass of each star is 2.4 times the mass of the Sun (M_sun = 1.989 x 10^30 kg). Therefore, the total mass (M) is:

M = 2 * (2.4 * M_sun) = 4.8 * M_sun

The distance between the stars is 4.2 times the distance between Earth and the Sun (1 astronomical unit, AU = 1.496 x 10^11 m). Therefore, the semi-major axis (a) is:

a = 4.2 AU

Now, we can plug these values into Kepler's Third Law formula to find the period of revolution:

T^2 = (4π^2 * (4.2 AU)^3) / (G * 4.8 * M_sun)

First, convert AU to meters:

a (in meters) = 4.2 * 1.496 x 10^11 m ≈ 6.2832 x 10^11 m

Now, substitute the values:

T^2 = (4π^2 * (6.2832 x 10^11 m)^3) / (6.67430 x 10^-11 m^3 kg^-1 s^-2 * 4.8 * 1.989 x 10^30 kg)

After solving for T^2, we can find the period T by taking the square root of the result:

T = √(T^2) ≈ 22.64 years

So, the period of revolution for this binary-star system is approximately 22.64 years.

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How can you predict the final temperature of a mixture of two substances that start at a different temperatures?

Answers

Answer:

If it is a true mixture, the mixing enthalpy is negligible, and there is no reaction or phase change, then you can do this using exclusively the temperatures of the individual compounds and their heat capacities. Any other process that takes place needs to be taken into account separately.

The solution can be found by understanding that we’re only using state variables. You can design any complicated process that starts with the starting situation and ends up at the ending situation, and the state variables will be the same. And sometimes a complicated process is easier to calculate than the simple one-step process, like here when mixing multiple components.

One way that will work is to start by bringing all compounds to the lowest temperature of either of the compounds. All but one of the compounds must be cooled down for this; make sure to calculate for each of the components how much energy is released. Now, mix all the components together. In the simplest situation sketched above you can calculate the heat capacity of the mixture by adding all the heat capacities of the components. Use this total heat capacity to calculate how much you can heat up the mixture using the energy you saved in cooling down the components earlier. This will be your desired end situation.

In case there are any phase changes or other processes in between, you need to take the energy needed for those into account too but in very similar ways.

a very very long wire with current 2 a is straight except for a circular loop of radius 0.05 m (see image). what is the magnetic field at the center of the loop? t unanswered what is the direction of the magnetic field at the center of the loop?

Answers

The magnetic field at the center of the circular loop is approximately 8π x \(10^_-6\) Tesla. The direction of the magnetic field is perpendicular to the plane of the loop, pointing out of the page or screen.

To find the magnetic field at the center of the circular loop, we can use Ampere's law. Ampere's law states that the magnetic field around a closed loop is proportional to the current passing through the loop.

The equation for the magnetic field at the center of a circular loop is given by:

B = (μ₀ * I) / (2 * R)

where B is the magnetic field, μ₀ is the permeability of free space (4π x\(10^_-7\) Tm/A), I is the current passing through the loop, and R is the radius of the loop.

In this case, the current passing through the loop is 2 A, and the radius of the loop is 0.05 m.

Substituting the values into the equation, we have:

B = (4π x \(10^_-7\)Tm/A) * (2 A) / (2 * 0.05 m)

B = (4\pi  * \(10^{-7}\)Tm/A) * (2 A) / (2 * 0.05 m)

Simplifying the equation, we get:

B = (4π x \(10^_-7\) Tm/A) * 40 A/m

B = 8π x \(10^_-6\) T

Therefore, the magnetic field at the center of the circular loop is approximately 8π x \(10^_-6\) Tesla.

Now, let's move on to the direction of the magnetic field at the center of the loop. Using the right-hand rule, we can determine that the magnetic field will be pointing perpendicular to the plane of the loop.

In other words, it will be pointing out of the page or screen if you imagine the loop in a two-dimensional representation.

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how was mugabe able to build power and what type of power base
is he

Answers

Mugabe gained power by using political strategies, forming alliances, and exploiting his status as a liberation hero within ZANU-PF.

Robert Mugabe, the former president of Zimbabwe, was able to build power through a combination of political strategies and alliances. One key factor was his involvement in the liberation struggle against white minority rule in Rhodesia (now Zimbabwe).

Mugabe emerged as a prominent figure within the Zimbabwe African National Union (ZANU) party, which later merged with the Zimbabwe African People's Union (ZAPU) to form the Zimbabwe African National Union - Patriotic Front (ZANU-PF). Mugabe's role as a liberation hero and his ability to mobilize support among the majority black population of Zimbabwe gave him a strong power base.

Within ZANU-PF, Mugabe strategically positioned himself and gained influence by forming alliances and outmaneuvering rivals. He rose to become the party's leader and played a key role in negotiating the Lancaster House Agreement in 1979, which paved the way for Zimbabwe's independence in 1980. Mugabe became the country's first prime minister and later transformed the position into an executive presidency, consolidating his authority.

Mugabe maintained power through various means, including controlling key institutions such as the military, intelligence agencies, and the ruling party. He also utilized patronage networks, distributing resources and positions to loyal supporters within the party and government. Mugabe's policies, such as the controversial land reform program, further solidified his power base by appealing to nationalist sentiments and redistributing land from white farmers to black Zimbabweans.

However, Mugabe's consolidation of power was also marked by authoritarianism, human rights abuses, and a declining economy. His grip on power faced challenges over the years, including opposition movements, internal party factions, and economic crises. Ultimately, his rule came to an end in 2017 when he was ousted from power following a military intervention.

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you are lifting a heavy box. Well consider this process for different choices of system and surroundings. (1) Choose the box as the system of interest. What objects in the surroundings exert significant forces on this system? Check all that apply. The floor The box You None The Earth

Answers

The floor and the Earth exert significant forces on the box.In this scenario, the box is influenced by significant forces from both the floor and the Earth

When considering the box as the system of interest, the floor exerts an upward normal force on the box to support its weight. According to Newton's third law, the box also exerts an equal and opposite downward force on the floor. Additionally, the Earth exerts a downward gravitational force on the box, which gives rise to its weight.

In this scenario, the box is influenced by significant forces from both the floor and the Earth. The floor provides the necessary support to counteract the weight of the box, while the Earth's gravitational force acts to pull the box downward.

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From what might be a possible scene in the comic book The X-Men, the Juggernaut (my) is charging into Colossus (mc) and the two collide. The initial speed of the Juggernaut is Vj; and the initial speed of Colossus is vci. After the collision, the final speed of the Juggernaut is Vjf and the final speed of Colossus is vcr as they each bounce off of the other, heading in opposite directions. (Assume the direction in which Juggernaut initially travels is the positive x direction and the direction in which Colossus initially travels is the negative x direction.) (a) What is the impulse experienced by the Juggernaut? (Use the following as necessary: mj, Vjf, and Vji) -mj("sx+vji ) î (b) What is the impulse experienced by Colossus? (Use the following as necessary: mc, VCF, and Vci. Note that the C is capitalized.) îc = m.('cp+ vci) î x (c) In your own words, explain how these impulses must compare with each other and how they are related to the average force each superhero experiences during the collision.

Answers

The impulse experienced by the Juggernaut and Colossus are related to the average force each superhero experiences during the collision. The impulses are equal in magnitude but opposite in direction.

The impulse experienced by Juggernaut is equal to the product of its mass and the change in velocity from before and after the collision. Similarly, the impulse experienced by Colossus is equal to the product of its mass and the change in velocity from before and after the collision.

The total impulse of the collision is zero, so the impulses experienced by the two characters must be equal and opposite. This means that the average force experienced by each character must be equal in magnitude and opposite in direction. This is because the impulse experienced by each character is equal to the average force multiplied by the time that force acts on the character.

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Leon is testing an unknown
substance and observes that the
substance retains its volume and
shape when placed in different
containers. Which phase of matter
is the substance most likely in?

Answers

The observation that a substance retains its volume and shape when placed in different containers indicates that the substance has a fixed volume and shape, which is a characteristic of a solid.

Solids have a fixed shape and volume because the particles that make up a solid are packed tightly together and held in a fixed position by intermolecular forces. As a result, solids maintain their shape and volume even when placed in different containers or when subject to external forces.

In contrast, liquids do not have a fixed shape, but rather take on the shape of their container. They do, however, have a fixed volume. This means that a liquid would change its shape to match the shape of its container, but its volume would remain constant.

Gases, on the other hand, do not have a fixed shape or volume. They take on the shape and volume of their container and are highly compressible.

Based on the observation that the substance retains its volume and shape when placed in different containers, it is most likely in a solid state. However, further testing may be needed to confirm this, as some liquids and even some gases can also exhibit a degree of fixed volume and shape under certain conditions.

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which of the following characteristics distinguishes uranus from every other planet in our solar system? a. it has more than one moon b. its atmosphere is made of gases c. it rotates on an axis tilted almost 90 degrees to the circle of its orbit d. its orbit is significantly tilted relative to the orbits of the other planets e. its magnetic axis does not lie in the same direction as its rotation axis

Answers

Its magnetic axis does not lie in the same direction as its rotation axis. Uranus is the seventh planet from the Sun and the third largest planet in our solar system. Option e is Correct.

It is unique in several ways that distinguish it from every other planet in our solar system. One of these characteristics is that its magnetic axis is tilted almost 90 degrees to the plane of its orbit. The magnetic axis of a planet is the direction in which its magnetic field is pointed. The magnetic axis of a planet is usually aligned with its rotation axis, but this is not the case for Uranus. In fact, Uranus's magnetic axis is tilted by about 59 degrees relative to its orbit, which is much more than any other planet in our solar system.

In contrast, the other characteristics listed in the options are not unique to Uranus. Every planet in our solar system has its own set of moons, and the composition of their atmospheres varies. The orbits of the planets are also tilted with respect to the Sun, and some of them have magnetic fields that are tilted with respect to their rotation axes. However, the tilt of Uranus's magnetic axis is the most extreme of any planet in our solar system.  

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1 2 3 4 5 6 7 8 9 10 Physical activity and exercise typically lead to __________. A. increased stress B. depression C. higher energy levels D. reduced quality of life Please select the best answer from the choices provided. A B C D

Answers

Physical activity and exercise typically lead to higher energy levels (C).

What is physical activity and exercise?

Physical activity and exercise refer to any bodily movement that requires energy expenditure by the muscles. This can include activities such as walking, running, cycling, swimming, weightlifting, and team sports, among others.

Physical activity and exercise are important for maintaining good health and well-being, as they can help to improve cardiovascular fitness, muscular strength and endurance, flexibility, and overall body composition.

Physical activity and exercise are known to stimulate the production of endorphins, which are natural mood elevators. This can lead to increased energy levels and a general feeling of well-being.

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What causes the curved, upper surface of water that commonly appears when using a graduated cylinder?

Answers

The stronger force of attraction between the molecule of the material and the walls of container caused the upper surface to be curved and the curved surface is known as Concave meniscus.

When the molecules of the solution or nay solvent attached to the walls of the container due to stronger attraction with the walls, it create a concave surface at the top, which is known as Meniscus and principle behind Meniscus is surface tension.

In contrast, a convex meniscus develops when the liquid’s dissolved particles are more attracted to one another than to the substance of the container, for example in barometers.

When the surface of a liquid, like as water, comes into contact with another phase (a solid, liquid, or gas), a phenomenon known as surface tension takes place, which resist the external force acting on it.

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The force of 5N south acts concurrently with force of 5N 30 degrees South of East

A. Draw the diagram - TAIL to TAIL

B. Label both vectors (see page one for example)

C. Draw and LABEL the resultant and equilibrant

D.Find the magnitude and direction of the resultant and equilibrant


(scale: 1cm = 1N)

The force of 5N south acts concurrently with force of 5N 30 degrees South of East A. Draw the diagram

Answers

Answer:

The magnitude and direction of the resultant is 8.66 N and \(60^{\circ}\) south of East.

The magnitude and direction the equilibrant is 8.66 N and \(60^{\circ}\) North of West respectively.

Explanation:

Let

\(P=5\ \text{N}\ \text{south}\)

\(Q=5\ \text{N}\ 30^{\circ}\ \text{south of east}\)

\(\theta\) = Angle between P and Q = \(60^{\circ}\)

Magnitude of resultant

\(R=\sqrt{P^2+Q^2+2PQ\cos\theta}\\\Rightarrow R=\sqrt{5^2+5^2+2\times 5\times 5\cos60^{\circ}}\\\Rightarrow R=8.66\ \text{N}\)

Direction is given by

\(\theta=\tan^{-1}\dfrac{Q\sin\theta}{P+Q\sin\theta}\\\Rightarrow \theta=\tan^{-1}\dfrac{5\sin60^{\circ}}{5+5\sin60^{\circ}}\\\Rightarrow \theta=30^{\circ}\)

The magnitude and direction of the resultant is 8.66 N and \(30^{\circ}+30^{\circ}=60^{\circ}\) south of East.

The magnitude and direction the equilibrant is 8.66 N and \(60^{\circ}\) North of West.

The force of 5N south acts concurrently with force of 5N 30 degrees South of East A. Draw the diagram

When is the possibility of solar weather affecting terrestrial weather the highest?

Answers

The possibility of solar weather affecting terrestrial weather will be the highest on July, 2025.

What is Weather?

This is defined as the atmospheric condition of a place and is influenced by various types of factor.

The possibility of solar weather affecting terrestrial weather will be the highest on July, 2025 and there will be a high number of sunspots present.

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Hi, can someone pls help me solve this? Thanks. It’s physics and the topic is electrostatics

Hi, can someone pls help me solve this? Thanks. Its physics and the topic is electrostatics

Answers

The effective external resistance of the circuit is 3.5 ohms, the current in the circuit is 1.71 A, the lost voltage in the battery is 1.285 V, and the current in one of the 3-ohm resistors is 1.71 A.

What is the effective external resistance?

To solve this problem, we can use Kirchhoff's circuit laws and Ohm's law.

First, let's calculate the equivalent resistance of the parallel combination of two 3-ohm resistors:

1/Rp = 1/3 + 1/3

Rp = 1.5 ohm

Now, let's calculate the total external resistance of the circuit:

R = 2 + Rp

R = 2 + 1.5

R = 3.5 ohm

Using Ohm's law, we can calculate the current in the circuit:

V = IR

I = V/R

I = 6/3.5

I = 1.71 A

The lost voltage in the battery is given by:

VL = E - Ir

VL = 23 - 1.711.5

VL = 1.285 V

The current in one of the 3-ohm resistors is the same as the current in the circuit:

I = 1.71 A

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Complete question:

A battery Of 3 cells is arranged in series each of emf 2V and internal resistance of 0.5-ohm and connected to a 2-ohm resistor.

In a series with a parallel combination of two 3-ohm resistors,

calculate the effective external resistancecalculate the current in the circuitthe lost Voltage calculate the current in one of the 3 ohm resistance

The Environmental Protection Agency has ben concerned about the levels of radon gas in homes. If a sample of gas taken from a basement contains 4.38 g of radon 222, how much radon will remain in the sample after 4 half-lives?

0.28 g

2.19 g

1.10 g

4.38 g

Answers

Answer is 2.19 g of radon will remain in the sample after 4 half-lives

The amount of radon 222 that would remain in the sample after 4 half-lives would be 0.28  grams , therefore the correct answer is option A.

What is radioactivity?

The ability of some unstable atoms to emit nuclear radiation spontaneously, typically in the form of alpha or beta particles frequently accompanied by gamma rays, is known as radioactivity.

As given in problem ,the Environmental Protection Agency has been concerned about the levels of radon gas in homes. If a sample of gas taken from a basement contains 4.38 g of radon 222,

The amount of the radon remains after the first half-life = 4.38/2

The amount of the  radon remains after the second half-life = 2.19/2

The amount of the radon remains after the third half-life = 1.095/2

The amount of the radon  remain after the fourth half-life=0.5575/2

                                                                                              = 0.28 grams

Thus, the correct answer is option A.

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if ablock is at verge of motion

Answers

If a block is on the verge of motion, Limiting friction acts on the block.

Friction refers to the force that acts on a body to oppose any motion. These are of the following types:

Static Friction: This friction acts on the body when it is at rest. This friction doesn't have a fixed value and is adjustable with force acts.Limiting Friction: This is the highest amount of friction that acts on the body just before it is in motion or the body is on the verge of motion. This friction acts on the body when it is at rest.Kinetic Friction: This friction acts on the body when it is in motion. This friction acts on the body when it is at rest. It has a fixed value independent of force acting on the body.

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However, the complete question should be: What type of friction, acts on the block, if a block is on the verge of motion?

An atom of xenon has a mass number of 127 amu. How many neutrons
does it contain? *

An atom of xenon has a mass number of 127 amu. How many neutronsdoes it contain? *

Answers

Answer:

73 neutrons.

Explanation:

Data obtained from the question:

Mass number of Xenon = 127.

Neutron number =...?

We can obtain the number of neutron present as follow:

Atomic number of Xenon = 54

Recall:

Atomic number = proton number = 54

Mass number = proton + neutron

127 = 54 + Neutron

Neutron = 127 – 54

Neutron = 73.

Therefore, 73 neutrons are present in the Xenon atom.

A 1 kg apple and a 2 kg baseball are 2 m apart. What is the force of gravity between each fruit?

Answers

Answer:

\(\boxed {\boxed {\sf 3.335 \times 10^{-11} \ N}}\)

Explanation:

We are asked to find the force of gravity between 2 objects. The following formula is used to calculate the attractive force of gravity:

\(F_g= \frac{Gm_1m_2}{r^2}\)

G is the universal gravitational constant or 6.67 × 10⁻¹¹ N*m²/kg². 1 mass is 1 kilogram and the other mass is 2 kilograms. R is the distance between the 2 objects, or 2 meters.

G= 6.67 × 10⁻¹¹ N*m²/kg²m₁ = 1 kg m₂ = 2 kg r= 2 m

Substitute the values into the formula.

\(F_g= \frac {(6.67 \times 10^{-11} \ N*m^2/kg^2)(1 \ kg)(2\ kg)}{( 2 \ m)^2}\)

Multiply the numerator. The units of kilograms squared cancel.

\(F_g= \frac {(6.67 \times 10^{-11} \ N*m^2/kg^2)(2 kg^2)}{(2 \ m)^2}\)

\(F_g= \frac {(6.67 \times 10^{-11} \ N*m^2)(2 )}{( 2 \ m)^2}\)

\(F_g= \frac {(1.334 \times 10^{-10} \ N*m^2)}{ (2 \ m)^2}\)

Solve the exponent in the denominator.

(2 m)²= 2 m*2m = 4 m²

\(F_g =\frac {(1.334 \times 10^{-10} \ N*m^2)}{ 4 \ m^2}\)

The units of meters squared cancel.

\(F_g =\frac {(1.334 \times 10^{-10} \ N)}{ 4}\)

\(F_g=3.335 \times 10^{-11} \ N\)

The force of gravity between the fruit is 3.335 × 10⁺¹¹ Newtons.

que es el periodo de un pendulo

Answers

Answer:

what

Explanation:

Answer:

El periodo del péndulo simple, para oscilaciones de poca amplitud, viene determinado por la longitud del mismo y la gravedad.

Explanation:

No influye la masa del cuerpo que oscila ni la amplitud de la oscilación. Donde: T: Periodo del péndulo.

In which direction will a negatively charged particle experience a force in an electric field?

A.
in the same direction as the electric field
B.
in the opposite direction as the electric field
C.
at right angles to the electric field
D.
always downward

Answers

Answer:

D always downward because it is negative

A stone is thrown horizontally from a 50m high cliff with an initial speed of 15 meters per second. How far will the stone have travelled from the cliff when it strikes the ground?

a. 45.92m/s
b. 47.85 m
c. 58.2 seconds
d. 35.85 m/s/s

Answers

This is a classic case of 'velocity components.'

Imagine a vector for velocity. Now, consider that this vector could be the hypotenuse of a right triangle, with two other sides going along the x and y-axis. These sides of the triangle will have values, and adding them up using the pythagorean theorem will prove that the sum of their squares equals the square of the original vector.

Well, okay, that's nice and all, you may be saying - but how do we solve the actual question?

Let's apply this thought to the question. This vector can have both an x component and y component (essentially, parts of the vector that travel along the x and y-axis).

Now, what could these components be? We know that the stone is thrown perfectly horizontally, meaning that the x-component is quite literally the velocity.

How about the y-component? Since it's thrown at a perfect horizontal, there isn't really any vertical velocity whatsoever. There's only horizontal velocity.

"Great, fantastic! So, what's the importance of figuring out the horizontal and vertical velocities?"

When a stone is in free fall, it experiences a gravitational acceleration. This acceleration from gravity, though, only affects the vertical velocity. Since gravity is vertical as well, it's essentially impossible for the horizontal velocity to be changed at all.

This means that to solve the horizontal distance, we simply need to find the time it takes for the rock to hit the ground and multiply said time by the horizontal velocity.

Since the vertical velocity is the only thing changed by gravity, we can write out an equation that can solve for the time:

∆Y = \(v_{i}\)t + \(\frac{1}{2}\)g\(t^{2}\)

We know that initial vertical velocity is zero, so:

∆Y = \(v_{i}\)t + \(\frac{1}{2}\)g\(t^{2}\)

∆Y = 0t + \(\frac{1}{2}\)g\(t^{2}\)

∆Y = \(\frac{1}{2}\)g\(t^{2}\)

We need to solve for t, so let's isolate the variable. Multiply both sides by 2 to get rid of the fraction:

∆Y * 2 =  \(\frac{1}{2}\)g\(t^{2}\) * 2

2∆Y = g\(t^{2}\)

Divide both sides by g:

(2∆Y)/g = \(\frac{gt^{2} }{g}\)

Square root both sides:

\(\sqrt{(2Y)/g}\) = \(\sqrt{t^{2} }\)

t = \(\sqrt{(2Y)/g}\)

Input our values for Y and g (Y is the height of the cliff, and g is gravitational acceleration):

t = \(\sqrt{(2*50)/9.80}\)

Solve:

t =  \(\sqrt{(2*50)/9.80}\)

t = 3.194 (s)

Whew! That was a lot of steps to find the time! Now that we have the time, we can find the horizontal distance the rock travels:

∆x = \(v_{i}\)t + \(\frac{1}{2}\)a\(t^{2}\)

The horizontal velocity has no acceleration (gravity is vertical!), so:

∆x = \(v_{i}\)t + \(\frac{1}{2}\)*0*\(t^{2}\)

∆x = \(v_{i}\)t

The horizontal velocity is 15 m/s, and the time is 3.194:

∆x = \(v_{i}\)t

∆x = 15 * 3.194

∆x = 47.91 (m)

Since we rounded the time, it makes sense that our final answer's a little bit off to the options. The closest one is option B, which is only 0.6m off, a tiny difference that may have come from the test maker's use of '10 m/\(s^{2}\)' as the gravitational acceleration (while we stayed as accurate as possible with 9.80) as well as our rounding of the final time.

Option B, the stone will have travelled 47.85 meters.

If you have any questions on how I got to the answer or if you're still confused on any topic I attempted to explain, just ask in the comments and I'll try to answer it to the best of my ability! Good luck!

- breezyツ

An object has a coefficient of kinetic friction of 0.2 and a normal force of 30N. Find the force of kinetic friction.

Answers

Answer:

Force of kinetic friction, Fk = 6N

Explanation:

Given the following data;

Coefficient of kinetic friction, μ = 0.2

Normal force, Fn=30N

To find the Force of kinetic friction;

Mathematically, the force of kinetic friction is given by the formula;

Fk = μFn

Where;

Fk represents the force of kinetic friction. μ represents the coefficient of friction. Fn represents the normal force.

Substituting into the equation, we have;

Fk = 0.2*30

Fk = 6N

Therefore, the force of kinetic friction is 6N.

A force that is present between two moving objects or surfaces is called kinetic friction. It is estimated in newtons (N) and is calculated by:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

Where, \(\rm F_{k}\) = frictional force,  \(\mu _{\rm k}\)  = coefficient, \(\rm F_{n}\) = normal force.

The kinetic friction of the object is 6N.

The kinetic friction can be estimated as:

Given,

Coefficient of kinetic friction (\(\mu\)) = 0.2

Normal force \(\rm F_{n}\) = 30 N

Substituting values in the formula:

\(\rm F_{k} =\rm \mu _{\rm k} F_{n}\)

\(\begin{aligned}\rm F_{k} &= 0.2 \times 30\\\\\rm F_{k} &= 6 \rm N\end{aligned}\)

Therefore, 6N is the frictional force.

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Can someone please help me with this I am quite stuck thanks

Can someone please help me with this I am quite stuck thanks

Answers

Answer:

The mass remains the same since stoichiometrically one mole reacts and one mole is formed

Explanation:

Calcium chloride is reacting with Sodium sulphate to form a white precipitate of calcium sulphate.

\({ \sf{CaCl _{2} + Na_{2} SO_{4} → CaSO _{4} + 2NaCl}}\)

From the equation, 1 mole of calcium chloride forms 1 mole of calcium sulphate.

R.F.M of CaCl2 = 40 + (35.5×2) = 111

R.F.M of CaSO4 = 40 + 32 + (16×4) = 136

R.F.M of Na2SO4 = (23×2) + 32 + (16×4) = 142

R.F.M of 2NaCl = 2[23 + 35.5] = 117

\({ \sf{(r.f.m \: of \: rectants) = (r.f.m \: of \: products)}} \\{ \sf{ (mass \: of \: rectants) = (mass \: of \: products)}} \\ \\ { \sf{(111 + 142) = (136 + 117)}} \\ { \sf{300.23 = x}} \\ \\ { \sf{x = \frac{300.32}{(111 + 142)} \times (136 + 117) }} \\ \\ { \sf{x = \frac{300.32}{253} \times 253 }} \\ \\ { \sf{x = 300.32}}\)

Answer:

The mass remains the same

Explanation:

What is permeability?
a. pore spaces in a body of earth material that are not interconnected
b. pore spaces that are interconnected to allow the movement of air or water
c. it is a term that is synonymous with
d. the water table the ability of water to move upwards against the pull of gravity
Question 3 0.34 pts
What is the capillary fringe?
a. The capillary fringe is what supplies water to a well.
b. material above the water table that is moistened by the rise of capillary water against gravity
c. The capillary fringe is what provides water to streams when they are dry.
d. a zone under Earth's surface where air (and sometimes a mixture of air and water) fills in the openings between soil particles and rock material

Answers

What is permeability? b. pore spaces that are interconnected to allow the movement of air or water. Permeability is a measure of the ability of a material to allow the flow of fluids through it.

It is a measure of the interconnectedness of the pore spaces in a material. Materials with high permeability allow fluids to flow through them more easily than materials with low permeability.

What is the capillary fringe? b. material above the water table that is moistened by the rise of capillary water against gravity. The capillary fringe is the zone of soil or rock that is saturated with water due to capillary action.

Capillary action is the ability of water to move upwards against gravity through the narrow spaces between soil particles. The capillary fringe is typically a few centimeters thick, but it can be thicker in some soils.

Permeability is a measure of the ability of a material to allow the flow of fluids through it.

The capillary fringe is the zone of soil or rock that is saturated with water due to capillary action.

Permeability is important in a variety of applications, including groundwater recharge, well design, and the construction of dams and levees. The capillary fringe is important for plant growth, as it provides water to plants that are not located directly above the water table.

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A 61.7 kg carpenter at a construction site plans to swing in a circular arc from one roof top to an adjacent roof at the end of a 11.5 meter rope suspended from a crane boom. if her wiry arms, toughened by years of driving spikes with a no. 22 framing hammer, are capable of exerting 1229 n of force on the rope, what is the maximum speed that she can tolerate at the low point of her swing?

Answers

At the lowest point of her swing, she can withstand a maximum speed of 10.78 m/s.

Given that,

Mass of the carpenter = 61.7 kg

Length of the rope = 11.5 m

Capable force = 1229 N

Centripetal force acting on the body,

F = mv²/r = (61.7× v²)/11.5 = 5.37 v²

Gravitational force acting on her is

F = m × g = 61.7 × 9.81 = 605.28 N

By summing up gravitational and centripetal forces to get the total available force,

5.37 v² + 605.28 = 1229

5.37 v² = 623.72

v² = 116.15

v = 10.78 m/s

Hence, the maximum speed at the low point of her swing is 10.78 m/s.

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what is the bad side of the Integration /eclectic theory ?

Answers

The Integration/Eclectic Theory is a broad concept encompassing various fields and concepts. Without specific context, providing a comprehensive answer is challenging. Nevertheless, potential drawbacks or criticisms associated with integration or eclectic approaches .

Integration or eclectic approaches can be discussed:

Lack of coherence: Integrating different perspectives, frameworks, or methodologies from multiple disciplines may broaden understanding but can also result in a lack of coherence or consistency. The components may not seamlessly fit together, leading to a fragmented or unclear theoretical framework.

  Overgeneralization: Eclectic approaches may incorporate diverse ideas without critically evaluating their compatibility or applicability in specific contexts. This can lead to overgeneralization or oversimplification of complex phenomena, disregarding important nuances or specific factors.

   Inconsistencies and contradictions: Combining different theories or approaches carries the risk of encountering inconsistencies or contradictions among the components. This can create confusion and hinder drawing clear conclusions or making accurate predictions.

   Lack of depth: Eclectic or integrative theories aiming to cover a wide range of perspectives may sacrifice depth. By attempting to include multiple viewpoints, the theory may not delve deeply into any one perspective, resulting in a superficial understanding of the underlying concepts.

   Difficulty in application: Applying eclectic theories can be challenging due to a lack of clear guidelines or principles. The absence of a unified framework makes it difficult to translate the theory into practical applications or develop specific interventions based on its recommendations.

It is important to note that these drawbacks are not inherent to all integration or eclectic theories. Some approaches successfully integrate multiple perspectives and provide valuable insights. However, it is crucial to critically evaluate the strengths and weaknesses of any theoretical framework to ensure its suitability for a particular context or research question.

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The current atomic model has a ?

Answers

Answer:

Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different. What makes atoms of different elements different?

Answer:

Its C.

Explanation:

I just got it right on my test.

Which phrase describes scientific law

Answers

A scientific law is an established principle that explains a phenomenon or behavior in the natural world. It is a concise statement that summarizes the results of many observations and experiments and is widely accepted as true because it has been confirmed over and over again.

Scientific laws do not explain why something happens, but rather they describe how something behaves under certain conditions. They provide a basis for predicting how things will behave in the future based on past experience. Scientific laws can be expressed mathematically, but not all scientific laws are mathematical equations. Some examples of scientific laws are the laws of thermodynamics, Newton's laws of motion, and the law of gravity. The law of gravity, for example, states that any two objects in the universe attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance between them. This law has been confirmed countless times through observations and experiments, and it has become a fundamental principle of physics. Scientific laws are not the same as scientific theories, which are explanations for why something happens. Theories are more complex and have not been confirmed as thoroughly as scientific laws. However, scientific laws and theories work together to form the basis of scientific understanding of the natural world.

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Does someone know how to do math with that equation

Does someone know how to do math with that equation

Answers

Answer:

f = 5 cm

Explanation:

using the thin lens equation, given as follows:

\(\frac{1}{f} = \frac{1}{d_{o}}+\frac{1}{d_{i}}\\\)

where,

f = focal length = ?

do = the distance of object from lens = 20 cm

di = the distance of image from lens = 6.6667 cm

Therefore,

\(\frac{1}{f} = \frac{1}{20\ cm}+\frac{1}{6.6667\ cm}\\\\\frac{1}{f} = 0.199999\ cm^{-1}\\\\f = \frac{1}{0.199999\ cm^{-1}}\\\\\)

f = 5 cm

Can the sun explain global warming? ( 2 points) Suppose that the Earth has warmed up by 1 K in the last hundred years. i) How much would the solar constant have to increase to explain this? ii) Compare this to the observed fluctuation of the solar constant over the past 400 years (shown in class) For part (i), begin with the standard 'blackbody' calculation from class, that is: set α=0.30, and assume that the Earth acts as a blackbody in the infrared.

Answers

No, the sun cannot explain global warming. Global warming is a phenomenon in which the temperature of the Earth's surface and atmosphere is rising continuously due to human activities such as deforestation, burning of fossil fuels, and industrialization.

This increase in temperature cannot be explained only by an increase in solar radiation.There are several factors which contribute to global warming, including greenhouse gases such as carbon dioxide, methane, and water vapor. These gases trap heat in the Earth's atmosphere, which causes the planet's temperature to rise. The sun's radiation does contribute to global warming, but it is not the main cause.

i) To calculate the increase in solar radiation that would cause the Earth to warm up by 1 K, we can use the following formula:ΔS = ΔT / αWhere ΔS is the increase in solar constant, ΔT is the increase in temperature, and α is the Earth's albedo (reflectivity).α = 0.30 is the standard value used for the Earth's albedo.ΔS = ΔT / αΔS = 1 K / 0.30ΔS = 3.33 W/m2So, to explain the increase in temperature of 1 K over the last hundred years, the solar constant would need to increase by 3.33 W/m2.

ii) The observed fluctuation of the solar constant over the past 400 years has been around 0.1% to 0.2%. This is much smaller than the 3.33 W/m2 required to explain the increase in temperature of 1 K over the last hundred years. Therefore, it is unlikely that the sun is the main cause of global warming.

The sun cannot explain global warming. While the sun's radiation does contribute to global warming, it is not the main cause. The main cause of global warming is human activities, particularly the burning of fossil fuels, which release large amounts of greenhouse gases into the atmosphere.

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A teacher demonstrates air pressure to the class. She takes a soft drink can and puts a little bit of water in it. Then she heats it up until the water is boiling. The students watch as the steam pushes air out of the can. The teacher then quickly takes the can, turns it over and dips the open end in bowl of water. A short time later there is a loud bang and the can collapses.. (a) When the teacher cools the can some of the steam turns back to water. What happens to the air pressure inside the can? (b) Why?( Use ideas about collisions in your answer). (c)Explain why the can collapses.

Answers

The can collapses because of the difference in air pressure between the inside and outside of the can and the decrease in air pressure inside the can caused by the condensation of the steam.

What is the significance of the collision of particles?

Here when the teacher cools the can, some of the steam turns back into water, and as a result, the air pressure inside the can decreases. The reason for this is due to the collisions as when the steam condenses back into water, due to a decrease in the air pressure,

Hence, the can collapses because of the difference in air pressure between the inside and outside of the can and the decrease in air pressure inside the can caused by the condensation of the steam.

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