A lever of class 1 has a lotal length of 3m and is able to lift a load of 60N with a force of 30N at a Time Find
the position of the fulcrum.​

Fin Lin = Fo Lo  Work = Work out where in = input and o = output

Fin / Fo = Lo / Lin = 30 / 60 = 1/2   (input force = 1/2 output force)

Lin + Lo = 3

Lo = 3 - Lin

1/2 = (3 - Lin) / Lin    from above

1/2 = 3 / Lin - 1

3 / Lin = 1.5   and Lin = 2

So the input length = 2 m and the output length = 1 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.

heats surface water up