Which of the following is an example of work being done on an object?
A-Water in a pot changes into steam.
B-A man pushes a couch across the room.
C-A prism scatters ultraviolet light into visible light.
D-A box rests on the floor.

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?

You have a pick-up truck that weighed 4,000 pounds when it was new. you are modifying it to increase its ground clearance. when you are finished

The necleus of an atom is made up of what subatomic particles?