An object at rest will stay at rest, and an object in motion will stay in motion, unless acted upon by an unbalanced force is known as which Law
of Motion?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?