John found an insect crawling on the sidewalk. it was 3 cm long. how many millimeters long was it? a. 3 mm b. 30 mm c. 300 mm d. 3000 mm

If a clock aboard a space ship traveling at 0.900 c of the speed of light relative to earth chimes once at the beginning of the hour and again when it reads one hour later, how much time would an observer on earth say elapsed between the two chimes?

If steel is more dense that lake water, why can a boat float

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.