This is a force that acts over a distance, can not be seen, and causes like poles to repel and opposite poles to attract. What is this force?

A)

gravity

B)

friction

C)

magnetism

D)

air resistenace

How much heat is released as a 5.89 kg block of aluminum cools from 462 °C to 315 °C. The specific heat capacity of aluminum is 0.900 J / (g*K)

A motorcyclist changes the velocity of his bike from 20.0 meters/second to 35.0 meters/second under a constant acceleration of 4.00 meters/second2. How long does it take the bike to reach the final velocity?

What is the reason nemo is called shark bait?

What must exist for electric charges to flow? electric potential or electric potential difference

If you hear a higher pitch from a clarinet than from a saxophone, how do the frequencies of the sound waves from the clarinet compare to those of the saxophone? A - The saxophone's waves have a higher frequency than the clarinet.

The sources of the heat inside Earth

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

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?

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

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.