The work function of a metal surface is 4.80 × 10-19 j. the maximum speed of the electrons emitted from the surface is va = 7.7 × 105 m/s when the wavelength of the light is λa. however, a maximum speed of vb = 5.1 × 105 m/s is observed when the wavelength is λb. find the wavelengths λa and λb.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.