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IrinaK [193]
3 years ago
7

According to the inverse square law of light, how will the apparent brightness of an object change if its distance to us triples

?
Physics
1 answer:
aleksley [76]3 years ago
4 0
According to the inverse square law of light, <span>apparent brightness will decrease by a factor of 9. Use the formula </span>B=L/(4*pD^2), to check it.
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You are asked to design a cylindrical steel rod 50.0 cm long, with a circular cross section, that will conduct 170.0 J/s from a
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Answer:

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Explanation:

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Now Area of cylinder is :

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solving for d:

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