Why is air a pure substance?

The human body stores chemical energy from digested food. Some of the chemical energy is converted into mechanical energy when the body moves. Which statement is best supported by this information? a.

How does the position of an object relate to the energy stored in an object?

What is the source of heat in the mantle

8. Explain the origin of the solar system.

Which radiation has a higher frequency than visible light

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to drop? A. The molecules in the water spread apart. B. The molecules in the thermometer's liquid spread apart. C.

The amount of energy carried by a wave is proportional to the square of the wave's A. frequency B. amplitude C. wavelength D. period ... ?

The pressure at the bottom of a jug filled with water does not depend on

at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?

A record player turntable initially rotating at 3313 rev/min is braked to a stop at a constant rotational acceleration. The turntable has a rotational inertia of 0.031kg? m2.