A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

where

f is the force

m is the mass

From the question we have

We have the final answer as

Hope this helps you

i. like it i'm gonna edit it tomorrow

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.