Achild walks 5 meters north, then 4 meters east and finally 2 meters south. what is the magnitude of resultant displacement of the child after the entire walk?
a. 1m b. 3m c. 5m d. 11m

The magnitude of resultant displacement of the child after the entire walk is 5 m.

(c) is correct option.

Explanation:

Given that,

A child walks 5 meters north,then 4 meters east and finally 2 meters south.

According to figure,

Here, EB =CD

So, AE = AB-EB

AE = 5-2 = 3 meters

We need to calculate the magnitude of resultant displacement of the child after the entire walk

Using Pythagorean theorem

Put the value into the formula

Hence, The magnitude of resultant displacement of the child after the entire walk is 5 m.

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.