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inysia [295]
3 years ago
5

A piano tuner strikes a tuning fork at the same time he strikes a piano key with a note of a similar pitch. If he hears 3 beats

per second, and the tuning fork produces a standard 440 Hz tone. Then what was the frequency produced by the struck piano string? a 434Hz or 446Hz b 437 Hz c 437Hz or 443 Hz d 443 Hz
Physics
1 answer:
DaniilM [7]3 years ago
7 0
The frequency produced by the string could be 437 Hz or it could be 443 Hz.

The frequency of the beats ... 3 Hz ... tells the piano tuner that
the difference between the fork and string frequencies is 3 Hz,
but it doesn't tell her which one is higher or lower.
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A force of 140 140 newtons is required to hold a spring that has been stretched from its natural length of 40 cm to a length of
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Answer:

The work done in stretching the spring is 0.875 J.

Explanation:

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On integration

W=700\times(\dfrac{x^2}{2})_{0}^{0.05}

W=700\times(\dfrac{(0.05)^2}{2}-0)

W=0.875\ J

Hence, The work done in stretching the spring is 0.875 J.

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What is the difference between output and input forces
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