A person rubs her hands together and they heat up

• kinetic energy

• light energy

• sound energy

• electrical energy

• chemical energy

• heat energy

(multiple choice)

Which statement describes the kinetic energy and total mechanical energy of a block as it is pulled at constant speed up an incline? (1) Kinetic energy decreases and total mechanical energy increases.

A moving walkway has a speed of 0.4 m/s to the east. A Stationary observer sees a man walking on the walkway with a velocity of 0.3 m/s to the east. What is the man's velocity relative to the moving walkway?

Why does the cyclist have less kinetic energy at position A than at position B? Options are A. Their is less friction between the tire and the road at position A than at position B. B.

Three liquids are at temperatures of 5 ◦C, 25◦C, and 34◦C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 17◦C.

You have found that tides on earth are determined primarily by the position of the moon, with the sun playing only a secondary role.

The best way to prevent heat exhaustion while exercising is to

The highest frequency radio waves are which type?

When a mass is placed on a spring with a spring constant of 15 newtons per meter, the spring is compressed 0.25 meter. How much elastic potential energy is stored in the spring?

Explain why we see the Milky Way as a faint band of light stretching across the sky.

A piece of plastic tape coated with iron oxide is magnet - ized more in some parts than in others. When the tape is moved past a small coil of wire, what happens in the coil? What is a practical application of this?