suppose you push down on the handle of a bicycle pump with a force of 20N .the handle moves 0.3m and there is no heat between the pump and its surroundings what is the change in thermal energy of the bicycle pump?

6 Joules

Explanation:

The change in internal energy must be equal the work done by pushing the handle with a 20 N force a distance of 0.3 meters. That is:

Change in internal energy = Work = 20 * 0.3 J = 6 Joules

c. rb

explanation:

the atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.