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polet [3.4K]
3 years ago
10

If you are at a train station and a train comes toward you, the train blows its whistle. as the train comes closer the whistle g

ets louder and as the train gets farther the whistle is quieter. What is this effect called?
Physics
1 answer:
Wittaler [7]3 years ago
4 0
This is called the Doppler Effect.
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It's momentum is twice as much.
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Answer:

2.86×10⁻¹⁸ seconds

Explanation:

Applying,

P = VI................ Equation 1

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From the question,

Given: P = 0.414 W, V = 1.50 V

Substitute into equation 2

I = 0.414/1.50

I = 0.276 A

Also,

Q = It............... Equation 3

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make t the subject of the equation

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From the question,

4.931020 electrons has a charge of (4.931020×1.6020×10⁻¹⁹) coulombs

Q = 7.899×10⁻¹⁹ C

Substitute these value into equation 4

t =  7.899×10⁻¹⁹/0.276

t = 2.86×10⁻¹⁸ seconds

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distance, direction, displacement

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Explanation:

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the answer is C

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