Answer:
42J
Explanation:
Given parameters:
Force applied = 6N
Distance moved = 7m
Unknown:
Amount of energy gained by the block = ?
Solution:
The amount of energy gained by the block is the same as the work done on the block.
The work done is the force applied to move the block through a distance;
Energy gained = force x distance = 6 x 7 = 42J
If the ball has a positive electric charge, what should the charge of the coilgun be to push the ball away?
A)positive
B) negative
C)neutral
Answer:
A
Explanation:if the things have the same charge they will repel makeing the ball move away form its positively charged guy = that the coil gun works.
a runner runs 100 m north, then 100 m west, then 200 m south. what is the magnitude of his total displacement? a. 100 m b. 141 m c. 200 m d. 400 m
Option B; The magnitude of his total displacement is 141cm
By hypotenuse theorem,
a = \(\sqrt{b^{2} +c^{2} }\)
total displacement = \(\sqrt{10000 + 10000}\) = 141 cm
The final distance from the beginning location, or total displacement, is represented by a vector sum. Using the initial velocity (u), acceleration (a), and time (t) traveled, this displacement calculates the distance or displacement (s) of an item. It can be used to solve for s, u, a, or t. The equation is s = ut + 12at2. It is modified below to demonstrate how to solve for each individual variable. By computing the total size of the shaded areas between the line and the time axis, the displacement can be determined. A rectangle and a triangle are present; to determine the overall displacement, the areas of each must be calculated and added
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The highest freefall jump on record is from a height of almost 38,000 m. At this height, the acceleration of gravity is slightly weaker than the accelera
of gravity on the surface of Earth. Although the skydiver used a parachute to slow himself down below a certain altitude, how would the increasing
acceleration impact his velocity and rate of displacement covered?
His velocity and rate of displacement will be affected by increasing his acceleration because as his speed rises as a result of his higher rate of acceleration, so does the rate at which air resistance rises.
Air exerts a force known as air resistance. The force acts in the opposite direction when anything is in motion through the air.
The force of air resistance works to balance the pull of gravity as a diver descends. The amount of air resistance increases as the skydiver descends faster and faster until it reaches a point where it is equivalent to the force of gravity.
When the forces of gravity and air resistance are equal, the skydiver has reached a state of equilibrium and is no longer accelerating. At this point, the skydiver reaches terminal velocity.
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A certain LCD projector contains a single thin lens. An object 24.2 mm high is to be projected so that its image fills a screen 1.78 m high. The object-to-screen distance is 2.94 m.
(a) Determine the focal length of the projection lens
We can calculate the focal length of the lens as follows:1/f = 1/d₀ - 1/d₁ = 1/2940 + 1/215910 = 0.00052So,f = 1/0.00052 = 1923.08 mm . Therefore, the focal length of the projection lens is approximately 1923.08 mm.
In order to find out the focal length of the projection lens for the given LCD projector, we can use the thin lens equation which is given as follows:1/f = 1/d₀ + 1/d₁ where f = focal length of the projection lensd₀ = distance of the object from the lensd₁ = distance of the image from the lens .
Given data: Object height, h₀ = 24.2 mm Image height, h₁ = 1.78 m = 1780 mm .
Distance of the object from the lens, d₀ = 2.94 m = 2940 mm . Now, we need to calculate the distance of the image from the lens, d₁. For that, we can use the magnification formula which is given as:m = - h₁/h₀ = d₁/d₀So, we can rearrange the above formula as:d₁ = - (h₁/h₀) × d₀ = - (1780/24.2) × 2940 = - 215910 mm .
We can see that the value of d₁ comes out to be negative which means that the image is formed on the opposite side of the lens. This shows that the lens is a diverging lens. Therefore, we can calculate the focal length of the lens as follows:1/f = 1/d₀ - 1/d₁ = 1/2940 + 1/215910 = 0.00052So,f = 1/0.00052 = 1923.08 mm . Therefore, the focal length of the projection lens is approximately 1923.08 mm.
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A mixture is made of two or more materials that
Jimmy is cooking pasta in a pot of water on the stove. He uses a stopwatch to see how long the pasta takes to cook depending on the temperature of the water in the pot. What is the independent variable and why?
Answer:
stove
Explanation:
The stove is the independent variable in this question as it does not depend on anything like other variables such as pot, water, temperature and of cause pasta.
The pot depends on the stove, the water depends on the pot and stove, the pasta depends on the water and its temperature.
Cheers.
Many measuring instruments have to be calibrated. What does this mean? Give an example.
Answer:
Explanation:
because we have to get a measuremt.
who was the first president of Amania
\(
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Levon Ter-Petrosyan won the majority of the votes and became the first president of independent Armenia.
Research about how to find the volume of three-dimensional symmetrical shape by integration. 4:19 AM Design any three-dimensional symmetrical solid. ( with cavity in it) 4:19 AM take the flat side(R) of one of the 3-D symmetrical shape (that you designed) and place it against a coordinate plane. Determine this flat will be revolving around which axis. 4:19 AM Find the volume for the 3-D symmetrical shape (show your work) 4:19 AM
To find the volume of a three-dimensional symmetrical shape using integration, we can use the method of cylindrical shells. This method involves dividing the shape into thin cylindrical shells and then integrating their volumes.
Let's say we have designed a symmetrical solid in the shape of a sphere with a cylindrical cavity running through its center. We will place the flat side (R) of the sphere against the x-y plane. The sphere will be revolving around the z-axis since it is symmetrical about that axis.
To find the volume, we first need to determine the equations for the sphere and the cavity.
The equation for a sphere centered at the origin with radius R is:
x^2 + y^2 + z^2 = R^2
The equation for the cylindrical cavity with radius r and height h is:
x^2 + y^2 = r^2, -h/2 ≤ z ≤ h/2
The volume of the solid can be found by subtracting the volume of the cavity from the volume of the sphere. Using the method of cylindrical shells, the volume of each shell can be calculated as follows:
dV = 2πrh * dr
where r is the distance from the axis of rotation (the z-axis), and h is the height of the shell.
Integrating this expression over the appropriate range of r gives the total volume:
V = ∫[r1, r2] 2πrh * dr
where r1 and r2 are the radii of the cavity and the sphere, respectively.
Substituting the expressions for r and h, we get:
V = ∫[-h/2, h/2] 2π(R^2 - z^2) dz - ∫[-h/2, h/2] 2π(r^2 - z^2) dz
Simplifying and evaluating the integrals, we get:
V = π(R^2h - (1/3)h^3) - π(r^2h - (1/3)h^3)
V = πh( R^2 - r^2 ) - (1/3)πh^3
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What is the mass of air in a room
measunng l0m x 5.0m x 20m if the
density of air is 1.8 kg m ?
Answer:
Just do 1000 times 1.8
Explanation:
This is a good answer
How much water will flow in 30 secs through 200 mm of capillary tube of 1.50 mm in diameter, if the pressure difference across the tube is 6660N/m² and viscosity is 8.01x10 kg/ms
The water outflow in 30 secs through 200 mm of the capillary tube is mathematically given as
\(Qo=1.6 \times 10^{2} \mathrm{~mL}\)
What is the water outflow in 30 secs through 200 mm of the capillary tube?\(\begin{aligned}\Delta P &=6660 \mathrm{~m} / \mathrm{m}^{2} \\\mu &=8.01 \times 10^{-4} \text { Pas } \\t &=30 \mathrm{~s} \\L &=200 \mathrm{~mm}=200 \times 10^{-3} \mathrm{~m} \\D &=1.5 \mathrm{~mm}=1.5 \times 10^{-3} \mathrm{~m} \Rightarrow \gamma=\frac{1.5 \times 10^{-3}}{2} \mathrm{~m}\end{aligned}\)
Generally, the equation for Rate of flow of Liquid is mathematically given as
\(\\$$Q=\frac{\pi r^{4} \times \Delta P}{8 \mu L}\)
$$
Where dP is pressure difference r is the radius
\(\mu\) is the viscosity of water
L is the length of the pipe
\(Q=\frac{\pi \times\left(\frac{1.5 \times 10^{-3}}{2}\right)^{4} \times 6660}{8 \times 8.01 \times 10^{-4} \times 200 \times 10^{-3}}\)
\(Q=5.2 \mathrm{~mL} / \mathrm{s}\)
In $30s the quantity that flows out of the tube
\(&Qo=5.2 \times 30 \\&Qo=1.6 \times 10^{2} \mathrm{~mL}\)
In conclusion, the quantity that flows out of the tube
\(Qo=1.6 \times 10^{2} \mathrm{~mL}\)
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what is the charge on capacitor b when the potential difference between the plates of b is 20.0 volts
The charge on capacitor b when the potential difference between its plates is 20.0 volts is equal to the product of its capacitance and 20.0 volts.
The charge on a capacitor is related to the potential difference between its plates and its capacitance, which is a measure of its ability to store charge. The capacitance is given by:
C = Q/V
where C is capacitance, Q is the charge on the capacitor, and V is the potential difference between its plates.
Assuming that you have the capacitance value of capacitor b, you can rearrange this formula to solve for the charge Q:
Q = C x V
Substituting the values, we get:
Q = C x 20.0 volts
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Hannah is driving a car up a hill. She observes that the car tends to slow down if she does not press down on the accelerator. Hannah suggests that friction between the car and the road is causing the car to slow down. Which best explains why Hannah’s suggestion is not a scientific theory?
Group of answer choices
Hannah’s suggestion is not a well-supported and widely accepted explanation
Hannah is not a well-paid scientist
Hannah’s suggestion is a claim that has been well tested.
Hannah’s suggestion is a good idea held by an individual and based on a life experience.
Answer:
C. is correct.
Explanation:
Hope this helps :)
The suggestion given by Hannah is not a well-supported and widely accepted explanation. So, option A is correct.
What is friction?Friction is a force that prevents two solid objects from rolling or sliding over one another. Although frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion. Automobile engines use about 20% of their output to overcome frictional forces in moving parts.
The adhesion forces between the contact zones of the surfaces, which are always microscopically uneven, appear to be the primary cause of friction between metals. Shearing these "welded" joints and the action of the tougher surface's imperfections scrubbing against the softer surface cause friction.
According to the question, Hannah is driving the car up a hill and when she is not pressing the accelerator the car slows down. The reason behind this is that there is an ascent of height that the car has to climb with its engine power and if the accelerator is not applied to it then it will start to slow down also friction is a factor that is involved in this case.
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the fact that wehave to identidy ovhets fro many angles is likely do to
The need to identify objects from multiple angles is a result of the complex nature of objects and our desire to understand them fully.
By examining an object from different perspectives, we can gain a more comprehensive understanding of its shape, texture, and structure.
This process is particularly important in fields such as archaeology, forensics, and engineering, where a thorough understanding of an object can provide valuable insights.
Additionally, identifying an object from multiple angles can help to eliminate any ambiguity or uncertainty in its identity, allowing us to make more accurate conclusions.
Overall, the need to identify objects from many angles reflects our desire for precision and accuracy in understanding the world around us.
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Nitrogen gas reacts with hydrogen to produce ammonia. Use the chemical equation to complete the statements.
N2 + 3H2 → 2NH3
There are
nitrogen atoms on the product side.
There are
hydrogen atoms on the reactant side.
Given equation
\(\\ \sf\longmapsto N_2+3H_2\longrightarrow 2NH_3\)
Nitrogen on product side:-
\(\\ \sf\longmapsto 2(1)=2\)
Hydrogen on reactant side:-
\(\\ \sf\longmapsto 3(2)=6\)
According to the question,
The Equation is
\( \sf \: N_2 + 3H_2 \: \longrightarrow2NH_3\)
Let's balance the equation (Excluded)
\(\sf \longmapsto \: N_2 + 3 H_2 = 2 NH_3\)
Hydrogen atoms on product side:
\(\sf \longmapsto2 \times 1\)
\(\sf \longmapsto \: 2\)
Nitrogen atoms on the reactant side:
\(\sf \longmapsto \: 3 \times 2\)
\(\sf \longmapsto \: 6\)
There fore,
Product side
\( \sf \: 2\)
Reactant side
\( \sf6\)
Does the mean molecular speed change as much as the temperature as the water heats up?
What is the mechanical advantage of the wheel and axle shown below?
02 in
24 in
А. 55.0
В. 120
С. 4.8
D. 95.2
Answer:
B. 120
Explanation:
24/.2 = 120
Answer:
120
Explanation:
24/0.2 = 120
(True / False) rotational and gravitational equilibrium both involve all of the following except
The correct answer is:True. Both gravitational and rotational equilibrium include all the factors to balance the forces of the system, except one factor.
Gravitational Equilibrium: The state of gravitational balance is reached when the forces pushing down on an object (weight) are balanced by the forces pushing up on it (tension, buoyancy, pressure). When this occurs, the object will neither accelerate up nor down. Rotational Equilibrium: The state of rotational balance is achieved when the forces acting to turn an object are balanced by other forces. For a body to be in rotational equilibrium, the sum of the torques acting on it must be zero. In this state, the body neither rotates nor changes its angular speed. Thus, both gravitational and rotational equilibrium include all the factors to balance the forces of the system, except one factor.
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10. Josie and Trey were working on their physics project and both built catapults. Trey's catapult shot a ball
30 meters in 10 seconds, while Josie's catapult shot a ball 45 meters in 15 seconds. Whose catapult caused
the ball to move at a faster speed?
Answer:
Josie's ball faster than T
Bio is a root word that means
O heart.
O life.
O cell.
O sugar.
In certain ranges of a piano keyboard, more than one string istuned to the same note to provide extra loudness. For example, thenote at 1.10 x 102 Hz has two strings at this frequency.If one string slips from its normal tension of 6.00 x102 N to 5.40 x 102 N, what beatfrequency is heard when the hammer strikes the two stringssimultaneously?
Answer:
The beat frequency is 5.5 Hz.
Explanation:
f = 110 Hz, T = 600 N , T' = 540 N
let the frequency is f'.
\(\frac{f'}{f}=\sqrt\frac{T'}{T}\\\\\frac{f'}{f}=\sqrt\frac{540}{600}\\\\\frac{f'}{f}=0.95\\\\f'= 104.5 Hz\)
So, the beat frequency is f - f' = 110 - 104.5 = 5.5 Hz
Will the plier with longer handles or shorter handles exert the most force? Use the principle of moments in your explanation
Answer:
plier
Explanation:
will the principle with longer handle exert the most force.
what is an object that can hold things together or lift an object?
Answer:
Inclined plane = 2. Something that can hold things together or lift an object. Wedge = 3.
Explanation:
Screw is simple machine which is used to hold to objects together
mark brainliest
Equation
B = u0i/2PiR
gives the magnitude B of the magnetic field set up by a current in an infinitely long straight wire, at a point P at perpendicular distance R from the wire. Suppose that point P is actually at perpendicular distance R from the midpoint of a wire with a finite length L. Using Eq. (Fig. above) to calculate B then results in a certain percentage error. What value must the ratio L/R exceed if the percentage error is to be less than 1.24%? That is, what L/R gives:
(Bi - Bf)/Bf *100% = 1.24%
The ratio L/R must exceed 0.0324 in order for the percentage error to be less than 1.24%.
We can start by finding the expression for the magnetic field at point P due to a finite wire of length L. We can approximate the wire as a series of infinitely long straight wires, each contributing a magnetic field at point P.
The magnitude of the magnetic field at point P due to each of these infinitely long wires is given by: B = (u0 i)/(2πr)
where i is the current in the wire, r is the perpendicular distance from the wire to point P, and u0 is the permeability of free space.
Since we have a finite wire of length L, we need to integrate over the length of the wire to find the total magnetic field at point P. The perpendicular distance from the midpoint of the wire to point P is R, so we need to integrate over the range x = -L/2 to x = L/2, where x is the distance from the midpoint of the wire.
The perpendicular distance from the wire to point P can be expressed as:
\(r = sqrt(R^2 + x^2)\).Using this expression for r, we can write the integral for the magnetic field as:
B = (u0 i)/(2π) * ∫[-L/2,L/2] dx / sqrt(R^2 + x^2)
This integral can be evaluated using a substitution of x = R tan(θ), which gives: B = (u0 i)/(2π) * ln[(L/2 + R)/(L/2 - R)]
Now we can use the equation given in the problem, which is for the magnetic field at point P due to an infinitely long straight wire, to find the percentage error in the approximation we just made:
(Bi - Bf)/Bf * 100% = [(u0 i)/(2πR) - (u0 i)/(2π) * ln[(L/2 + R)/(L/2 - R)]] / [(u0 i)/(2πR)] * 100%
Simplifying this expression, we get:
(Bi - Bf)/Bf * 100% = [1 - ln[(L/2 + R)/(L/2 - R)]] * 100%
Now we can solve for the value of L/R that gives a percentage error of 1.24%. Setting the percentage error equal to 1.24%, we get:
[1 - ln[(L/2 + R)/(L/2 - R)]] * 100% = 1.24%
Solving for L/R, we get:
L/R = (e^(1.24%/100%) - 1) * (L/2 - R)/(L/2 + R)
L/R = 0.0324
Therefore, the ratio L/R must exceed 0.0324 in order for the percentage error to be less than 1.24%.
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Hot water is poured into a mug and the mug gets hot. This is an example of which type of energy transfer?
A) Radiation
B) Conduction
C) Convection
D) This is not an energy transfer
Answer:
conduction i think
Explanation:
Answer:Conduction
Explanation:
Difference between crest and trough
Answer:
The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength.
I hope it's helpful!
what is the mass of a car that is traveling at 20 m/s and has a 400,000 J of kinetic energy
Answer:
\(2000kg\)
Explanation:
Kinetic Energy Equation: \(KE = (mv^2)/2\)
KE: Kinetic energy of the object
m: Mass of the object
v: Velocity of the object
\(400000=(m*20^2)/2\)
\(800000=400m\)
\(m=2000kg\)
A roller coaster is traveling at 80m/hr until the emergency breaks turn on, causing it to come to a complete stop in 10s. What is the acceleration of the roller coaster?
This means that the roller coaster is decelerating at a rate of 8m/s² until it comes to a complete stop.
What is decelerating?Decelerating is the process of slowing down or decreasing the speed of a vehicle, person, or object. It is the opposite of accelerating, which is the process of increasing speed. Deceleration can be caused by the force of friction from the road or other surfaces, or by reducing the amount of engine power or braking. Deceleration is necessary to safely slow down and stop a vehicle and to negotiate turns or curves in the road.
The acceleration of the roller coaster can be calculated using the equation
a = (Vf - Vi)/t, where Vf is the final velocity, Vi is the initial velocity, and t is the time taken for the change in velocity to occur.
In this case, Vf = 0m/hr, Vi = 80m/hr, and t = 10s.
Therefore, the acceleration of the roller coaster is -8m/s².
This means that the roller coaster is decelerating at a rate of 8m/s² until it comes to a complete stop.
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How do the rocks in the mantle move?
A. They do not move.
B. They move in convection currents.
C. They flow like water.
D. They move on top of the crust.
Answer:
b. they move in convection currents.
Explanation:
i learned this in 4th grade
A vehicle accelerates to 17.36 m/s after being stopped at a red light. The vehicle travels 24.99 m while accelerating from the intersection. How fast was its acceleration?
So, the vehicle's acceleration approximately 6.03 m/s².
IntroductionHi ! I will help you to solve a problem about "acceleration in a straight line movement". When an object experiences an acceleration, the object will experience a change in the value of the velocity in a certain time interval. When experiencing a change in speed, of course, objects will move. This movement will be written as "s" (shift or displacement).
Formula UsedThe formula that you can use to solve this question is:
\( \boxed{\sf{\bold{(v_t)^2= (v_0)^2 + 2 \times a \times s}}} \)
With the following condition :
\(\sf{v_t}\) = final velocity of an object (m/s)\(\sf{v_0}\) = initial velocity of an object (m/s)a = acceleration that happen (m/s²)s = the shift or distance of the object (m)SolutionWe know that :
\(\sf{v_t}\) = final velocity of an object = 17.36 m/s\(\sf{v_0}\) = initial velocity of an object = 0 m/s >> the vehicle initially stopped at the intersection.s = the shift or distance of the object = 24.99 mWhat was asked ?
a = acceleration that happen = ... m/s²Step by step :
\( \sf{(v_t)^2= (v_0)^2 + 2 \times a \times s} \)
\( \sf{(17.36)^2= (0)^2 + 2 \times a \times 24.99} \)
\( \sf{301.37 \approx 49.98 \times a} \)
\( \sf{a \approx \frac{301.37}{49.98}} \)
\( \boxed{\sf{a \approx 6.03 \: m/s^2}} \)
ConclusionSo, the vehicle's acceleration approximately 6.03 m/s².
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