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Q. An oil drop whose mass is determined to be 3.5×10^-15 kg is held at rest between two large plates separated by 1.4 cm when the potential difference between them is 330 V.

Q. Attempting to stop on a slippery road, a car moving at 80 skids across the road at a 30 angle to its initial motion, coming to a stop in 3.8.

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