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A spherical drop of water carrying a charge of 31 pC has a potential of 530 V at its surface (with V = 0 at infinity).
(a) What is the radius of the drop?
(b) If two such drops of the same charge and radius combine to form a single spherical drop, what is the potential at the surface of the new drop?
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The electric motor of a model train accelerates the train from rest to 0.820 m/s in 18.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration
What is moment of inertia
in a particular region of earths atmosphere the electric field above earths surface has been measured to be 140 nc
Two identical point charges (q = +6.70 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.475 m. Determine the speed of the test charge when it reaches the center of the square
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