Avector has an x-component of length 12 and a y-component of length 14.
what is the angle of the vector? (hint: use the inverse tangent.)

∴ The angle of the vector is 49.4°.

Explanation:

Given:

For a vector:

The tangent of angle of a vector is given by:

where represents the angle of the vector, represents the length of and represents the length of .

Plugging in the given values to get the angle of vector .

Taking both sides to get

∴ The angle of the vector is 49.4°.

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.