Hi! I have a physics problem that I just don't understand. It is as follows: Imagine that you are in an elevator with a tank of water and three goldfish. A device in the gravel (of the fish tank) measures gauge pressure at the bottom at the tank. (a) Suppose it reads 4000 N / m² with the elevator car at rest. Will it increase, decrease, or stay the same when the car accelerates upwards? Explain. (b) What will it read if the car drops at 9.8 m / s²? I know about pressure in relation to fluids at rest but I'm not sure what happens when the fluid is accelerated upwards or downwards. I also understand that gauge pressure is absolute pressure minus atmospheric pressure. Please help - thanx!