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The force of gravity decreases very rapidly with distance, since force is inversely proportional to distance2 . The Sun is much further away from the Moon than the Earth, so its gravitational a...
The current is the rate of flow of charge. It is a measure of how many electrons pass a point over a certain amount of time. We measure current using an ammeter which gives current in Amps. Current is usu...
Yes - Momentum is a vector quantity. A vector quantity possesses both a magnitude and direction. A scalar quantity possesses only a magnitude and no direction. Mass is an example of a scalar quantity (mas...
The molecules at the bottom of the mug gain energy and spread out as a result. This means that these molecules are less dense than the ones above them so they rise upwards. As they do so, they lose energy...
Pressure is given by P=F/A, where F is force and A is area. Neither are given in the question, but A is the area of the cube in contact with the table; this is the area of one face of the cube, so A=L...
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