Suppose you are investigating how the day ends hamsters affect how much they run on the hamster wheel. in order to control the experiment which of these should you do? a. change only the diet of each hampster. b. give all the hamsters the exact same diet. c. only allow some hampsters to run on the wheel. d. compare the behavior of hamsters and gerbils

1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

If we relied solely on the nonrenewable resources found in the u.s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal