A man is pulling a 20 kg cart up a hill that is 5 m high if he used 50 N force how far did he pull the cart for

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

What explosion in the upper solar atmosphere releases about as much energy as millions of 100-megaton hydrogen bombs exploding simultaneously?