An electron with a speed of 2.3 ×106m/s collides with an atom of element x. shortly afterward, the atom emits a 1240 nm photon. what was the electron's speed after the collision? assume that, because the atom is so much more massive than the electron, the recoil of the atom is negligible. hint: the energy of the photon is not the energy transferred to the atom in the collision.

hotter stars = bluer stars

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.

it's a b and