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melomori [17]
3 years ago
13

Anyone??????????????????

Physics
2 answers:
nlexa [21]3 years ago
7 0
I was about to say gravity but it’s not on there smh..
yulyashka [42]3 years ago
4 0

Explanation:

I believe it is b or c. most likely b

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You set a tuning fork into vibration at a frequency of 723 Hz and then drop it off the roof of the Physics building where the ac
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Given

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From Doppler effect we can write as

f'=f\cdot \frac{v-v_o}{v+v_s}

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697=723\cdot (\frac{343-0}{343+v_s})

v_s=(\frac{f}{f'}-1)v

v_s=(\frac{723}{697}-1)\cdot 343

v_s=12.79\approx 12.8\ m/s

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distance traveled by fork is given by

v^2-u^2=2as

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v_s^2-0=2\times 9.8\times s

s=\frac{12.8^2}{2\times 9.8}

s=8.35\ m

                                       

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