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Physics

Andre House

Friction removes energy from objects in motion. Which statement best describes how this works?

a) friction transforms KE into thermal energy

b) friction transfers thermal energy to KE

c) friction transforms TE into PE

d) friction transforms PE into KE

e) friction transfers KE into PE

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Physics

Kamren Stokes

when a heavey containr is lowered from second floor of a building what kind of work is said to be done

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Physics

Trey

From the top of a tall building, you throw one ball straight up with speed v0 and one ball straight down with speed v0. (a) Which ball has the greater speed when it reaches the ground? (b) Which ball gets to the ground first? (c) Which ball has a greater displacement when it reaches the ground? (d) Which ball has traveled the greater distance when it hits the ground?

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Physics

Brooklyn Griffith

Clearly, Atwood's machine has a lot of systematic error that would not be present if we were to simplify the experiment. What is one reason we might expect to get better results using Atwood's machine rather than following Galileo's example and just dropping objects off of tall buildings?

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Physics

Felicity Dickerson

The temperature of a gas sample is increased from 50 degrees celsius to 100 degrees celsius. By what factor must the pressure be changed if the volume is kept constant?

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Physics

Kayla Todd

How does acceleration affect speed and velocity

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Physics

Juan Campbell

An object will have the same mass and weight on the moon as it has on Earth.

A. false

B. true

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Physics

Kassidy Finley

A parallel-plate capacitor in air has a plate separation of 1.25 cm and a plate area of 25.0 cm2. The plates are charged to a potential difference of 244 V and disconnected from the source. The capacitor is then immersed in distilled water. Assume that distilled water is an insulator.

(a) What is the charge on the plates before immersion?

What is the charge on the plates after immersion?

(b) What is the capacitance after immersion?

What is the potential difference after immersion?

(c) What is the change in energy of the capacitor?

? U = Uwater - Uair = 5 nJ

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Physics

Donna Benson

Explain what parallel medium boundaries do to the path of the wave after it travels through both boundaries. (air and water)

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Physics

Aurora Huerta

Is 'velocity'the displacement of an object during specific unit of time?

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Physics

Sherlyn Landry

An uncharged 5.0-µF capacitor and a resistor are connected in series to a 12-V battery and an open switch to form a simple RC circuit. The switch is closed at t = 0 s. The time constant of the circuit is 4.0 s. What is the charge on either plate after one time constant has elapsed?

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Physics

Olive Suarez

A spelunker (person who explores caves) determines that the cave entrance is located 349 m, 253° from her current position. How far south and how far west from her current position is the cave entrance?

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Physics

Parker Small

10. A car moving at 18 m/s accelerates at - 2.5 m/s² as it approaches a stop sign.

a. How long does it take the car to come to a complete stop?

b. What distance does the car travel as it is breaking?

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Physics

Amiya Newton

The following forces act on an object: 10 N north, 7 N south, and 4 N east. What is the magnitude of the net force?

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Physics

Guest

Explain why water boiling in a container stops

boiling momentarily when the lid is removed

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