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An isolated charged conducting sphere of radius 12.0 cm creates an electric field of 4.90 104 N/C at a distance 22.0 cm from its center.
(a) What is its surface charge density?
µC/m2
(b) What is its capacitance?
pF
A woman lies on a weightless board across two scales. Her feet are directly over the right scale. How far above her feet is her center of mass
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A small piece of dust of mass m = 1.3 mu or micro g travels horizontally through an electric air cleaner in which the electric field is 478 N/C. What is the charge on the dust particle
A rock is thrown on earth with an initial horizontal velocity and it hits the ground at x meters away from the point where the stone is thrown. how much larger is the new planet's mass relative to earth
A dead tree is initially stationary and there is a 30.0-degree angle between the tree and the vertical, How fast is the top of the tree moving (in m/s) just before it hits the ground
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