With a vacuum power brake booster, when you apply the brake pedal with the engine off you should hear the sounds of entering the booster.

mass and volume are the answers you are looking for

im guessing the west of station b

your answer is, orbit around the nucleus

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.