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Natalka [10]
3 years ago
13

What is the speed of light​

Physics
2 answers:
Hunter-Best [27]3 years ago
6 0
299 792 458 m/s. Unit of speed
Rainbow [258]3 years ago
3 0
The speed of light is......299 792 458 m / s
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A train station bell gives off a fundamental tone of 500 Hz as the train approaches the station at a speed of 20 m/s. If the spe
Brut [27]

Answer: 529.9 Hz

Explanation:

Here we need to use the Doppler equation, so we have:

f' = f*(v + v0)/(v - vs)

Here, f is the frequency = 500Hz

v is the velocity of the wave, = 334m/s

v0 is the velocity of the observer = 20m/s

vs is the velocity of the source = 0m/s

Then we have:

f' = 500Hz*(334m/s + 20m/s)/(334m/s) = 529.9 Hz

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What is it that makes a magnet different from a piece of iron that is not mangetic?​
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Answer:

Under normal conditions, a magnetic material like iron doesn't behave like a magnet because the domains don't have a preferred direction of alignment. On the other hand, the domains of a magnet (or a magnetized iron) are all aligned in s specific direction.

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That's efficiency. There's no law that it must be stated in percent.
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