A metal sphere of radius carries a positive charge of amount . A concentric spherical metal shell with inner radius and outer radius surrounds the inner sphere and carries a total positive charge of amount 5 , with some of this charge on the outer surface (at ) and some on the inner surface (at ). (a) How is the charge of 5 distributed on the two surfaces of the outer shell

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.

a person with a mass of 106kg has a weight of 1060n