What is the purpose of a tuner in a radio? The tuner selects only the signal of a specific frequency and rejects the rest.

The tuner converts inaudible high-frequency signals into sound waves that can be heard.

The tuner detects a wide range of broadcast frequencies.

The tuner converts a direct current into a high-frequency alternating current.

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.

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