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Arte-miy333 [17]
2 years ago
5

Frank D. Drake, an investigator in the SETI (Search for Extra-Terrestrial Intelligence) program, once said that the large radio

telescope in Arecibo, Puerto Rico, can detect a signal which lays down only a picowatt of power over entire surface of the Earth. What is the power received by the radio telescope if the diameter of the antenna is300 m? What would be the power of the source at the center of our galaxy which couldprovide such a signal? The center of galaxy is 22000 light years away. Assume that source is radiating uniformly in all directions and that the Earth is a disk with the radiusof 6378 km.

Engineering
1 answer:
AlexFokin [52]2 years ago
4 0

Answer:

attached below

Explanation:

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Explanation:

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If you measure 0.7 V across a diode, the diode is probably made of
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Answer:

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Explanation:

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2 years ago
If a heat engine has an efficiency of 30% and its power output is 600 W, what is the rate of heat input from the combustion phas
jarptica [38.1K]

Answer:

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Explanation:

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Explanation:

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