It is the naturaltendency of an object to stay at rest.

What is the potential energy of a 0.2 kg ball lifted to a height of 5.0 m above the  ground?

The rate of change in velocity of a moving object per unit time.

Sounds consist of vibrations that travel through air.

It measures the time and distance

distance, time, force

The stages of mitosis

Why is it that, during a thunder storm, the flashes of lightning are seen before  the thunder is heard?