Find the magnitude of the acceleration of the block after the system is released from rest.
Express your answer in terms of the variables , , and appropriate constants.
ANSWER:ablock = 3.27

Answer:

44

Explanation:

Work = Force X Distance

The direction of the friction force F exerted by the horizontal surface on the crate will be in the left direction.

From the information given, the 85-lb force P is applied to the 200-lb crate, which is stationary before the force is applied.

mg = 200 ×  0.2248 × 9.8 = 440.608

The static friction force will be:

= 0.5 × 440.608

= 220.304N

Therefore, the static friction is greater than the force applied. Therefore, there'll be a static friction acting on the box on the left direction.

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Newton's first law, also known as the law of inertia, states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

It implies that any object, either stationary or in motion, would remain as it is, unless an external force acts on it. When an external force is applied, it results in a change in motion in terms of direction, speed, or both. This is a statement that describes Newton's first law of motion.Basically, Newton's First Law of Motion states that a body at rest remains at rest and a body in motion maintains uniform motion in a straight line, unless acted upon by an external force.

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Answer:

1.school and community helps in growth and development of you social health as when u learn how to be compatible with the people around you, you will do better in life

2. by trying and solving

by not giving

by innovating

by being motivated

BY KNOWING THAT U CAN DO IT

Answer:

In reality, the filament gets so hot it in a real sense bubbles off molecules and electrons. Now and again this material gathers as a dull spot at the highest point of the bulb. Eventually, the filament falls apart, gets frail, and breaks, subsequently finishing the life of the light. Lights radiate light by siphoning an electric flow through a dainty tungsten fiber. The filament warms and emits light. Over the long haul, the filament oxidizes and turns out to be increasingly fragile, until it splits up and the bulb goes out. ... Tungsten picks up obstruction as it warms.

Hope this helped :)

Answer:

There is no sentence.

Explanation:

(a) The budget constraint can be written as: C = wL + V, where C is consumption, w is the real wage, L is leisure, and V is non-labor market income.

(b) With ẞ = 1/2, V = 100, and w = 200, John's optimal supply of labor cannot be determined without information about his preferences for leisure and consumption. The utility function only represents his preferences, but we need additional information to determine the specific amount of labor he would choose to supply.

(c) John's total income is the sum of his labor income and non-labor market income: Total income = Labor income + Non-labor income = wL + V. Without knowing the specific value of L, we cannot calculate the total income.

(d) Similarly, without knowing John's preferences for leisure and consumption, we cannot determine the specific level of consumption he would choose.

(e) In the case where John is subject to a 10% income tax on labor income only, his new optimal supply of labor would depend on the tax rate's impact on his preferences and the trade-off between leisure and consumption. Without further information on his preferences and the specific tax structure, we cannot determine the new optimal supply of labor.

Additional information about John's preferences for leisure and consumption, as well as the specific tax structure, is necessary to calculate his optimal labor supply, total income, consumption, and the impact of the income tax on his labor supply.

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Color, Opacity, Hardness

The three properties that can be observed in a substance will be density, physical state, and color.

A kind of matter with predictable chemical composition and physical characteristics is referred to as a chemical substance. According to certain texts, a chemical compound cannot be physically divided into its component parts without rupturing chemical bonds.

A substance's physical property is a quality that can be seen or quantified without affecting the substance's identity. Color, density, hardness, and boiling and melting points are examples of physical qualities. The capacity of a material to go through a certain chemical transition is described by its chemical property.

The three properties that can be observed in a substance will be density, physical state, and color.

The three characteristics of a substance that can be seen are its density, physical condition, and color.

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Answer:

its because pf gravity the more gravity is shown on the ball the faster it hits the grounnd.

The total mechanical energy of the bicyclist is 1400 J, obtained by adding her potential energy of 720 J and kinetic energy of 680 J. The correct answer is option B.

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If an electron with a kinetic energy of \(12.0 eV\)absorbs all the energy of a photon of green light (wavelength 546 nm) upon reaching a rectangular barrier of height \(20.0 eV\)and width 1.00 nm, the factor by which the electron's probability of tunneling through the barrier would increase can be calculated.

The probability of an electron tunneling through a barrier is influenced by the energy of the electron and the height and width of the barrier. Tunneling refers to the phenomenon where a particle can pass through a barrier despite lacking the classical energy to overcome it.

In this scenario, the energy of the incident electron \((12.0 eV)\) is lower than the height of the barrier \((20.0 eV)\). However, if the electron absorbs all the energy of a photon of green light (wavelength 546 nm), it gains additional energy equal to the energy of the absorbed photon.

The energy of a photon can be calculated using the equation\(E = hc/λ,\)where E is the energy, h is Planck's constant, c is the speed of light, and λ is the wavelength. By substituting the given wavelength of 546 nm, we can determine the energy of the absorbed photon.

Once the energy of the absorbed photon is determined, the new total energy of the electron can be calculated by adding the initial kinetic energy to the absorbed photon's energy. If this total energy is greater than the height of the barrier, the probability of tunneling through the barrier increases.

To calculate the factor by which the probability of tunneling increases, one would need additional information, such as the specific potential barrier profile and the mathematical model used to describe tunneling. Without this information, it is not possible to determine the exact factor.

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Answer:

No

Explanation:

Acceleration is the rate of change in velocity. Here the car maintains a constant speed, no change in velocity

Answer:

nitial GPE = final KE 2500*10*200 = ½ 2500*v^2 v^2 = 2*10*200 v= 63.24 m/sec

Explanation:

(a) The initial temperature is 373.95 K.

(b) The final temperature is 546.15 K.

(c) The total internal energy change of the fluid during this process is 515.4 kJ.

(d) The process can be represented as an isochoric heating process on the P-v diagram and as an isobaric expansion process on the T-v diagram.

(a) To find the initial temperature, we can use the saturated steam tables. At a pressure of 200 kPa, the corresponding saturation temperature is 373.95 K.

(b) Since the volume doubles, the process is an isochoric (constant volume) heating process. Using the ideal gas law, we can determine the final temperature. The initial and final volumes are related by the equation V_final = 2V_initial. Since the mass remains constant, the specific volume (v) is inversely proportional to the density (ρ). Therefore, ρ_final = ρ_initial/2. Using the ideal gas law, we can calculate the final temperature to be 546.15 K.

(c) The total internal energy change can be calculated using the equation ΔU = mC_vΔT, where m is the mass of the fluid and C_v is the specific heat at constant volume. Given the mass as 0.5 kg, the specific heat of water at constant volume, and the temperature change, we can find that the total internal energy change is 515.4 kJ.

(d) On the P-v diagram, the process is represented as a vertical line at 200 kPa, indicating constant pressure. On the T-v diagram, the process is shown as an upward-sloping line, indicating an isobaric expansion process. The initial state is represented as a point on the left, and the final state is represented as a point on the right. The path between the initial and final states is a straight line connecting these two points.

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Answer:

Explanation:

Caty  ,  Use   the relativity formula for length.  ( they teach this in H.S. ? )  it's from my Modern Physics in college, A 300 level class  

L = \(L_{0}\)\(\sqrt{1-\frac{v^{2} }{c^{2} } }\)

L = 3  \(\sqrt{1-\frac{.95^{2} }{1^{2} } }\)

L = 0.9367496998  meters

L = 0.94 meters approx

The largest ratio of the circular disk at the two points is ac2/ac1.

The given parameters:

The angular speed of each disk is given as;

\(\omega = 2\pi N\)

where;

thus, the angular speed is independent of radius of the circular disk

ω2/ω1 = 1

the centripetal acceleration of each disk is calculated as follows;

\(a_c = \frac{v^2}{r} \\\\a_c_1 = \frac{v^2}{r_1} \\\\a_c_2 = \frac{v^2}{2r_1} \\\\\frac{a_c_2}{a_c_1} = \frac{2r_1}{v^2} \times \frac{v^2}{r_1} = 2\)

the angular  acceleration of the disk is calculated as follows;

\(\alpha = \frac{\omega }{t}\)

the angular acceleration is independent of the radius of the disk.

α2/α1 = 1

Thus, the largest ratio of the circular disk at the two points is ac2/ac1.

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The correct answer is(b). There is a physical change from the solid state to a gas state where energy between the molecules increases.

During sublimation, carbon dioxide transitions directly from the solid state (dry ice) to the gas state without passing through the liquid phase. In this process, individual molecules of carbon dioxide gain energy from the surroundings, leading to an increase in their kinetic energy and molecular movement.

As a result, the carbon dioxide molecules separate from each other and form a gas. This phase change is considered a physical change rather than a chemical change since the chemical composition of carbon dioxide remains the same throughout the process.

Therefore, the sublimation of carbon dioxide results in a physical change where the molecules transition from the solid state to the gas state, gaining energy and increasing their molecular movement.

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What is the definition for Rate? D

What is the definition for Motion? A

What is the definition for Displacement? B

What is the definition for speed? C

What is the definition for Constant? E

What is the definition for Average? F

Answer:

hey!!

Newton's second law of motion, also known as the law of acceleration, explains the relationship between an object's mass, the applied force, and its resulting acceleration. The law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically, Newton's second law can be expressed as:

F = ma

Where:

F represents the net force acting on the object,

m represents the mass of the object, and

a represents the acceleration produced by the force.

In simpler terms, Newton's second law states that the force acting on an object determines how much it accelerates. A larger force applied to an object will result in a greater acceleration, while a smaller force will produce a smaller acceleration. Additionally, if the mass of the object is increased, the same force will produce a smaller acceleration, and vice versa.

This fundamental law of motion helps us understand how forces and masses interact to produce motion. It is widely applicable and plays a crucial role in fields such as physics, engineering, and everyday life when studying the behaviour of objects in motion.

i hope this helps you :)

The speed of the Earth's rotation affects the length of a day, which in turn influences various aspects of life, including the distribution of sunlight, temperature patterns, and the overall dynamics of ecosystems.

To calculate the speed of the Earth's rotation 155 million years ago, we need to consider the rate at which the Earth's rotation is slowing down. According to the given information, the Earth slows down 1/30000 of a minute every 100 years.

Let's first calculate the change in the Earth's rotation speed over 155 million years:

Change in rotation speed = (1/30000 minute/100 years) * (155 million years)

Now we can calculate the speed of the Earth's rotation at that time:

Current rotation speed - Change in rotation speed

Given that the current rotation speed is 1670 kilometers/hour, we can substitute the values and calculate:

Rotation speed at that time = 1670 km/hour - (Change in rotation speed)

Once we have determined the rotation speed at that time, we can assess its potential impact on the movement of dinosaurs or mankind.

A change in the rotation speed could have implications for the behavior, adaptation, and survival of living organisms, including dinosaurs and early humans.

However, it is important to note that the exact magnitude and direct consequences of changes in rotation speed on specific species and their movements would require a more detailed analysis and consideration of various ecological factors.

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Answer:

What is most widely accepted today is a the giant-impact theory. It proposes that the Moon formed during a collision between the Earth and another small planet, about the size of Mars. The debris from this impact collected in an orbit around Earth to form the Moon.

Answer:

D. shortest wavelength

Explanation:

Photons with the highest energy have the shortest wavelength. The shorter the wavelength, the higher the energy of a photon.

A photon is a quantity that transmits electromagnetic energy from one place to the other.

Energy, wavelength and frequency of a photon are connected using the expression:

    E =  h f  = \(\frac{hc}{wavelength}\)  

E is the energy

h is the Planck's constant

 f is the frequency.

Answer:

      ΔU = - 9,179 10-11 J

Explanation:

For this exercise the two basketballs are linked by gravitational interaction, so we can use gravitational energy

               U = - G m₁m₂ / R

In this case the mass is equal and the initial distance is r₁ = 19 cm = 0.19 m

               U₁ = - G m² / r₁

let's calculate

              U₁ = - 6.67 10⁻¹¹ 0.55² / 0.19

              U₁ = - 10,619 10⁻¹¹ J

when its centers are separated it is at r₂ = 1.4 m

              U₂ = - 6.67 10⁻¹¹ 0.55² / 1.4

              U₂ = - 1.44 10-11 J

the energy between these two points is

          ΔU = U₂ - U₁

          ΔU = (-1.44 +10.619) 10-11

          ΔU = - 9,179 10-11 J

The number of molecules of diameter 3 * \(10^{-10}\) m on the surface of a piece of tape with dimensions 2cm x 10cm is

Number of circles across a line = l  / D

l = Length of the line

d = Diameter of the circle

Length of tape = 10 cm

Width of tape = 2 cm

d = 3 * \(10^{-10}\) m = 3 * \(10^{-8}\) cm

No. of molecules in one row ( Horizontally ) = 10 / 3 * \(10^{-8}\)

No. of molecules in one row = 3.33 * \(10^{8}\)

No. of molecules in one column ( Vertically ) = 2 / 3 * \(10^{-8}\)

No. of molecules in one column = 0.67 * \(10^{8}\)

Total number of molecules = 3.33 * \(10^{8}\) * 0.67 * \(10^{8}\)

Total number of molecules = 0.22 * \(10^{16}\)

Therefore, the number of molecules on the surface of the tape is 0.22 * \(10^{16}\)

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The force exerted by the biceps is approximately 39.2 Newtons. if the subject is holding a 4-kg ball and we are ignoring friction, we can determine the force exerted by the biceps using Newton's second law of motion.

According to Newton's second law, the force (F) exerted on an object is equal to its mass (m) multiplied by its acceleration (a):

F = m * a

In this case, since the ball is being held by the subject and not moving, its acceleration is zero. Therefore, the force exerted by the biceps is equal to the weight of the ball.

Weight (W) is the force due to gravity acting on an object and is given by:

W = m * g

Where:

m = mass of the object (4 kg in this case)

g = acceleration due to gravity (approximately 9.8 m/s²)

Substituting the values:

W = 4 kg * 9.8 m/s²

W ≈ 39.2 N

Therefore, the force exerted by the biceps is approximately 39.2 Newtons.

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Hi there!

Question 1:

We know that Impulse = Δp = mΔv, so:

I = 0.045(70) = 3.15 Ns

I = F · t, so:

3.15/0.1 = F

F = 31.5 N

Question 2.

We can find the impulse using:

I = Ft

I = 300 · 0.04 = 12 Ns

Find the change in velocity using:

I = mΔv

12/0.13 = Δv = 92.31 m/s

A rate law that is proportional to the concentration of reactants raised to a power, which corresponds to the reactant's stoichiometric coefficient, is often used to describe reactions that can occur in a single step.

rk = [N2O5] = 2.40 10 53.0 10 5 = 0.8 mol L 1. Calculate the concentration of N2O5 using the reaction's rate and rate constant, which are 2.40 mol L-1 second-1 and 3 mol L-5 second-1, respectively.

The following is how the chemical reaction 2O3 3O2 develops. The appropriate expression for the rate law is O3 O2 +O (FAST) O+O32O2 (SLOW).

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\( \LARGE{ \underline{\underline{ \sf{\pink{Required \: answer:}}}}}\)

Step-by-step Explanation:

Momentum is given by the product of mass and velocity of any object.

We have:

Then, Momentum:

= 0.1 kg × 55 m/s

= 5.5 kg m/s (Ans)

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