What is the mass of an object if its potential energy is 800 J and it is 2.0 m above the ground?

When the water vapor cools it condenses select a number that represents his process on the

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Describe the forces both attractive and repulsive that occur as two atoms move closer together.