Question

E. Write one word for the following.
1.
The movement of air molecules.
2.
A motion which repeats itself after a fixed interval of time.
3. A motion in which a body moves back and forth about its mean position.
4. A straight line from the centre of a circle to its circumference.​

Answer 1

Answer:

The oxygen and nitrogen molecules in air at normal room temperature are moving rapidly at between 300 to 400 metres per second. Unlike collisions between macroscopic objects, collisions between particles are perfectly elastic with no loss of kinetic energy.