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The Work-Energy principle states that the total work done on or by an object is equal to the total change in energy between the given initial and final states. This can be reworded to also say that the to...

When the balloon is rubbed on your head, it becomes electrostatically charged (this is because electrons are transfered to/from the balloon from/to your hair). When you bring the balloon, which now has an...

Terminal velocity occurs when an object in free fall doesn't accelerate any further. As F=ma, when a = 0, F must be 0. F in this equation refers to resultant force. Because all objects in earth's gravity ...

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...

In a series circuit each resistor will have the same current passing through it.  If we assume that the wires connecting the resistors have no resistance, then the total potential difference, V, is given ...