An object in space has a constant velocity of 20m/s. What is its acceleration? If this acceleration does not change, when will it stop?

i) , ii) The object will not stop, as known acceleration is not different from zero.

Explanation:

i) When an object has a constant velocity, it means that both magnitude and direction of velocity does not change in time. Acceleration is the rate of change of velocity in time, as velocity is constant, acceleration must be zero. ()

ii) The object will not stop, as known acceleration is not different than zero.

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid