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VashaNatasha [74]
1 year ago
12

Which of the following statements about waves are true? Select all that apply.

Physics
1 answer:
vampirchik [111]1 year ago
3 0

Answer:

Sound waves cannot travel through empty space

sound can travel through liqui

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Which theory of the origin of the moon would be most supported if the moon had an irregular shape, like an asteroid? impact theo
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An 800-kHz radio signal is detected at a point 2.7 km distant from a transmitter tower. The electric field amplitude of the sign
dimaraw [331]

Answer:

Option D is correct: 170 µW/m²

Explanation:

Given that,

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The intensity of radial signal is given as

I = c•εo•Eo²/2

Where c is speed of light

c = 3×10^8m/s

εo = 8.85 × 10^-12 C²/Nm²

I = 3×10^8 × 8.85×10^-12 × 0.36²/2

I = 1.72 × 10^-4W/m²

I = 172 × 10^-6 W/m²

I = 172 µW/m²

Then, the intensity of the radio wave at that point is approximately 170 µW/m²

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2 years ago
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Answer:

A true

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