An object is dropped from rest at height of 18.0 m. What is the final velocity of that object, just before it hits the ground?

answer; equivalent to a one(1) horsepower motor;

the higher the current the higher the mag field around it the higher the influence on the compass

your answer is, orbit around the nucleus

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me