A 4.9 eVeV photon strikes the surface of silver and an electron is emitted. What is the maximum possible speed of the electron?

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

the moving of the box is a result of centripetal force. think of that  as a car or a truck in this case creates a turn, the force of friction performing upon the turned wheels of the car runs centripetal force obligatory for circular motion for the things inside it.