Physics, 21.10.2019 22:20 TrivialRen1894
Apower plant produces 1000 mw to suply a city 40km away. current flows from the power plant on a single wire of resistance0.050 ω/km, through the city, and returns via the ground, assumed to have negligible resistance. at the power plant thevoltage between the wire and the ground is 115kv. a) what is thecurrent in the wire? . b) what fraction of the power is lostin transmission?
Answers: 2
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Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)
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Aheavy piece of hanging sculpture is suspended by a90-cm-long, 5.0 g steel wire. when the wind blows hard, the wire hums at its fundamental frequency of 80hz. what is the mass of the sculpture?
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Apower plant produces 1000 mw to suply a city 40km away. current flows from the power plant on a sin...
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