What is the speed of a commercial jet which travels form New York to Los Angeles (4800) in 6 hours

Explanation:

Given

Required

Determine the speed of the jet

The speed is calculated as:

Substitute 4800 km for Distance and 6hr for Time

Hence, the speed of the commercial jet is 800km/hr

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.