Which describes Einstein’s second postulate about the special theory of relativity? The speed of light in a vacuum is constant,
2 answers:
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Answer:
Emitted power will be equal to
Explanation:
It is given factory whistle can be heard up to a distance of R=2.5 km = 2500 m
Threshold of human hearing
We have to find the emitted power
Emitted power is equal to
So emitted power will be equal to