"In this problem, you calculated that when the wavelength of incoming photons goes down by a factor of two, from 800 nm to 400 nm, the stopping potential required increases by more than a factor of three, from 0.6 V to 2.15 V. In general, for a real material with a positive work function, how will the stopping potential change when the wavelength goes down by a factor of N? "

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?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .

Which of the following best describes the shape of earth's orbit? a.ellipticalb.circularc.spirald.figure eight