Ahorse pulls forward on a carriage with a given force. by newton's third law, the carriage must be pulling on the horse backward with an equal and opposite force. given this, what explains why the horse and carriage can move forward? two brown horses pulling wooden carriage image from wikimedia commons, cc by-sa 2.0 choose 1 choose 1 a the cart is rolling on wheels while the horse's hooves have traction with the ground b the forward force of the horse is just big enough to overcome the backward force of the cart and start the cart forward c the cart's force is only in reaction to the horse's force so it does not define direction of movement d there is a brief moment where the horse pulls before the reaction force kicks in e the forward and backward forces are equal, so it actually can't move forward

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.

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