Assume that the increase in internal energy of the 1.0kg of water is equal to ite decrease in g. pe
Calculate the rise in temperature of the water. The specific heat capacity of water is
4200 J/(kg°c)

a person with a mass of 106kg has a weight of 1060n

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