An electron is released from the negatively-charged plate of a parallel plate capacitor, initially at rest, and it is accelerated across the gap to hit the positively-charged plate. if the capacitor was powered by a 12 v battery, the capacitor was fully charged, what was the kinetic energy of the electron when it hit the positively-charged plate? a) 144 ev b) 14 ev c) 12 ev d) 120 ev e) 360 ev

c) 12 eV

Explanation:

The electron crosses a potential difference of 12 V in total, This means that its initial electric potential energy as it leaves the negative plate is equal to

due to the law of conservation of energy, when the electron moves towards the positive plate this electric energy is all converted into kinetic energy of the electron (in fact, the speed of the electron increases).

When the electron reaches the positive plate, all the electric potential energy has been converted into kinetic energy, which is therefore exactly 12 eV.

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

force tends to be low and long diustance masses are high