2 years ago

Which student is doing work?

Physics

2 answers:

Vilka [71]2 years ago

8 0

Answer:

hope this helps

Explanation:

Alja [10]2 years ago

5 0

Answer: C, B

Explanation:

A-Rebecca is just leaning so she isn't doing any work.

B-Marcus is lifting, so that's work.

C-Starr is carrying so that's work too

D-Louis is only studying, he isn't doing nothing that he could make any work

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A 1056-hertz tuning fork is struck at the same time as a note on the piano and you hear 2 beats/second. You tighten the piano st

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Answer:

The frequency of the piano string is <em>1059 Hz</em>.

Explanation:

The frequency beat (fb), 2 beats/second, is the absolute difference between the frequency of the tuning fork (1056 Hz) and the frequency of the piano string.

As the piano string gets tightened, the frequency beat becomes 3 beats/second.

Therefore,

fb = $fb = fpiano - ftuning fork\\ 3 Hz=fpiano-1056Hz\\ fpiano=1056Hz+3Hz\\ fpiano=1059Hz$

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Answer:

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