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Physics

Cuddle Pig

A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency.

A)

0.13s

B)

2s

C)

7.6s

D)

4,275,000 s

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Physics

Janessa Brown

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?

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Physics

Rhett Levine

A nurse counts 66 heartbeats in one minute. What is the period of the hearts oscillation? In minutes

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Physics

Jamar

A room is 16 ft x 12 ft x 12 ft. would air enter or leave the room if the temperature changed from 27°c to - 3°c while the pressure remained constant? Determine the volume of the air which moved in or out of the room.

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Physics

Tori

Suppose that at room temperature, a certain aluminum bar is 1.0000 m long. The bar gets longer when its temperature is raised. The length l of the bar obeys the following relation: l=1.0000+2.4*10-5T, where T is the number of degrees Celsius above room temperature. What is the change of the bar's length if the temperature is raised to 11.3 ∘C above room temperature?

Express your answer in meters to two significant figures.

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Physics

Nora Stephens

Describe the energy transformations that take place in a battery-operated fan.

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Physics

Mayra Gilmore

You have arranged that the magnetic field in a particular region of space is due North with a value of 0.0040 T. An electron enters the field traveling to the West with a speed of 9.5 percent of the speed of light. As a result, the electron experiences a magnetic force which is upwards. 1) What is the strength of this magnetic force?

2) What is the amount of the resulting acceleration of the electron?

3) What will be the result of the acceleration that you have calculated in part (b) ?

A) The direction of the moving electron will change but its speed will remain constant.

B) Both the speed and direction of the moving electron will change.

C) The speed of the moving electron will change bu

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Physics

Guest

Calculate the amount of heat needed to melt 35.0 g of ice at 0 ºC. Express your answer in kilojoules

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Physics

Lyla Atkins

What is the coefficient of static friction between the coin and the turntable?

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Physics

Sienna Atkinson

Explain two reasons why women and minorities were excluded from psychology

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Physics

Genius

What is the full meaning of (i. p. s. m. n)

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Physics

Alessandro Stephens

What effect does an unbalanced force have on an object?

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Physics

Maximillian Santos

How long does it take to drive 2376 miles at 65mph?

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Physics

Joey Bridges

Most earthquakes are produced by the rapid release of which kind of energy stored in rock subjected to great forces?

a. kinetic

b. thermal

c. elastic

d. mechanica

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Physics

Vanessa Byrd

Liam is two-years old. His mother is concerned about his behavior. Liam is very different from how his sister Briana was when she was his age. He does not make eye contact. When she smiles at him, he doesn't smile back. He doesn't seem to like her hugging or kissing him. It seems that Liam has

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