A bird flies straight northeast a distance of 75.8 km for 3.5 h. With the x-axis due east and the y-axis due north, what is the displacement (in km) in unit vector notation for the bird

Explanation:

The mathematical notation for the displacement vector R is given by

Now a bird flies straight northeast a distance of 75.8 km for 3.5 h such that x-axis points towards east and the y-axis points towards north.

Put and

Therefore,

Displacement vector is given by

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.