4 years ago

Which of the following might be the material list for an experiment?

1 answer:

8 0

Answer:

Explanation:

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dusya [7]

Answer:

C sedimentary rocks is the answer.

Explanation:

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4 years ago

Marianna [84]

C!!!+37,500 is the answer

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4 years ago

dlinn [17]

Answer:

Hey mate hope its help you....

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3 years ago

Natasha2012 [34]

A

because waves need air or something else to travel through

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4 years ago

enyata [817]

Answer:

Emitted power will be equal to $7.85\times 10^{-5}watt$

Explanation:

It is given factory whistle can be heard up to a distance of R=2.5 km = 2500 m

Threshold of human hearing $I=10^{-12}W/m^2$

We have to find the emitted power

Emitted power is equal to $P=I\times A$

$P=I\times 4\pi R^2$

$P=10^{-12}\times 4\times 3.14\times 2500^2=7.85\times 10^{-5}watt$

So emitted power will be equal to $7.85\times 10^{-5}watt$

4 0

3 years ago