If a go-kart motor applies a 8,500N force for 7.5s to move the cart 10m, how much horsepower does it generate? (HINT: solve for Watts first, then convert it to hp... 1hp=746W)

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

How can waves travel through ground?