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Q.A simple u tube contains mercury. when 5.824 cm of ordinary water is poured into the right arm of the tube, how high does the mercury rise in the left arm above its initial level.

Q. How many 90-rm W, 120-rm V light bulbs can be connected to a 20-rm A, 120-rm V circuit without tripping the circuit breaker? (Note: This description of a light bulb gives the power it dissipates when connected to the stated potential difference; that is, a 25-rm W, 120-rm V light bulb dissipates 25 rm W when connected to a 120-rm V line.)

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