What is a force?
A.
A force is a push or a pull.
B.
A force is a substance that reacts with matter.
C.
A force is equivalent to work.
OD.
A force is a form of energy.
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Ans is Force means a push or pull.for eg:pull a door,push a door.

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a. as the temperature increases, the kinetic energy of the gas molecules increases & the molecules move faster & further away from each other.

b. if you decrease the temperature of a fixed amount of gas at constant pressure, the combined gas law reduces to charles's law. in this case, volume will also decrease.