Electrons got ejected out as if they were ping pong balls by the light particle (photon). Electrons were not moving initially. Then, it was moving later because of the light. a. what is the momentum of the electron initially (p=mv) Hint: Is it moving initially?

b. does the electron have momentum after being hit by the light particle? Hint: is it moving after being hit?

c. what can you infer about light particles in momentum? Hint: where is the electron getting its velocity from?

The answer is d, you can easily test a theory! hope i you : )

Answer;

hot magma rises and pushes up toward the lithosphere, and as it cools it cycles back down toward the core to be heated again.

explanation; convection currents are the circular pathways taken by a fluid that enhances heat transfer by the process known as convection which occurs in fluids.convection currents transfer heat from one place to another by mass motion of a fluid. earth mantle is in a semi-liquid state and behaves like any other fluid, rising up from the bottom of the mantle after becoming hotter and less dense from heat of the earth's core, as the rock loses heat into the earth's crust it becomes cooler and more dense, then sinking back down to the core, then repeating the cycle.

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