A water tank of demensions 3 metre × 2 metre × 2 metre is half filled with water how much will be exerted by water in the bottom of the tank

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c