An electric heater used to boil small amounts of water consists of a 15-omega coil that is immersed directly in the water. It operates from a 120-V socket. How much time is required for this heater to raise the temperature of 0.50 kg of water from 13 C to the normal boiling point
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Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.
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Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
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Which component of the earth’s atmosphere is decreased due to photosynthesis?
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An electric heater used to boil small amounts of water consists of a 15-omega coil that is immersed...
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