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poizon [28]
3 years ago
14

1. Which of the following materials would likely create the strongest, most stable slope?

Physics
2 answers:
defon3 years ago
4 0

Answer:D

Explanation:

ValentinkaMS [17]3 years ago
4 0

Answer:

The answer is D

Explanation:

Mudstone is not stable enough, sandstone is a little more but not enough, unconsolidated sediment just won't, out of the four granite works best. :)

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A spherically spreading EM wave comes from an 1800-W source. At a distance of 5.0 m, what is the intensity, and what is the rms
Aleonysh [2.5K]

Explanation:

It is given that,

Power of EM waves, P = 1800 W

We need to find the intensity at a distance of 5 m. Also, the rms value of the electric field.

Intensity,

I=\dfrac{P}{4\pi r^2}\\\\I=\dfrac{1800}{4\pi\times (5)^2}\\\\I=5.72\ W/m^2

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I=\epsilon_o cE^2_{rms}

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So,

E_{rms}=\sqrt{\dfrac{I}{\epsilon_o c}}\\\\E_{rms}=\sqrt{\dfrac{5.72}{8.85\times 10^{-12}\times 3\times 10^8}}\\\\E_{rms}=46.41\ V/m

Hence, this is the required solution.

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3 years ago
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