This is an apparatus for studying the photoelectric effect. the work function of the material beinginvestigated is 3.810–19j. light of a wavelength 350 nm is incident on the material. what is the lowestvoltage needed between the cathode (c) and the anode (a) to stop any electrons ejected from the cathodefrom reaching the anode?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

What energy transformations occur each time the skateboarder rolls up the ramp?

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging