Can anyone tell me the answer and explanation and the calculation too?

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles