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The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. There fore, atransformer is plugged into the wall socket and produces thenecessary voltage for charging the batteries. The batteries arerated at 9.0 V, and a current of 232 mAis used to charge them. The wall socket provides a voltage of120 V.
a) Determine the turns ratio of the transformer.b) What is the current coming from the wallsocket?c) Find the average power delivered by the wallsocket and the average power sent to the batteries.
an aluminum-alloy rod has a length of 10.008 cm at 16.400degc and a length of 10.020 cm at the boiling point of water.a
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A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 13 mW. How many photons are emitted per second by this laser
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