2 years ago

Do natural elements reflect light?

1 answer:

3 0

Isn't it true that most if not all elements reflect light because they have colors and colors let us know that light is being reflected colors are just the light that is reflected<span />

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Preston's clock produces 45 useful energy units for every 100 units of electricity used. What is the efficiency of the clock? 0.

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The correct answer is - 45 percent.

Since the clock produces 45 useful unites energy units for every 100 unites of energy that it uses, than it turns out that the efficiency of the clock is 45 percent.

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Explanation:

The body of water labeled number 3 is Orinoco river.

The body of water labeled number 7 is the Atlantic ocean.

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What are the best example of no point source of pollution

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Answer:

land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification.

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A confined aquifer has a specific storage of 2.4 x 10-S ft and a thickness of 300 ft. How much water (in acre-ft) would it yield

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Answer:

water it yield is 244290.45 ft

Explanation:

given data

specific storage SS = 2.4 × $10^{-5}$ ft

thickness b = 300 ft

water declined ΔH = 4.8 ft

radius r = 1,500 ft

to find out

How much water would it yield

solution

we know that

volume of water is

Vw = S × Area × ΔH ..............1

here S = specific storage × thickness

S = 2.4 × $10^{-5}$ × 300

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area = πr² = π 1,500² = 7068589.471 ft²

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Vw = 7.2 × $10^{-3}$ × 7068589.471 × 4.8

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