What describes how much matter is in a object? ?

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?

Which accounts for an increase in the temperature of a gas that is kept a constant volume

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.