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Ludmilka [50]
2 years ago
9

I don’t know this one I need help

Physics
1 answer:
nikdorinn [45]2 years ago
4 0
D
Using the kinetic energy 1/2mv^2 formula
5*10^5 is the answer
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How does momentum conservation work for a rocket firing its engines to speed up in deep space?
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Select all the correct answers.
amid [387]

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Matter comprises all of them and among them are independent. what are they
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Read 2 more answers
A 40-cmcm-long tube has a 40-cmcm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. A
Licemer1 [7]

Answer:

1070 Hz

Explanation:

First, I should point out there might be a typo in the question or the question has inconsistent values. If the tube is 40 cm long, standing waves cannot be produced at 42.5 cm and 58.5 cm lengths. I assume the length is more than the value in the question then. Under this assumption, we proceed as below:

The insert in the tube creates a closed pipe with one end open and the other closed. For a closed pipe, the difference between successive resonances is a half wavelength \frac{\lambda}{2}.

Hence, we have

\dfrac{\lambda}{2}=58.5-42.5=16 \text{ cm}

\lambda=32\text{ cm}=0.32 \text{ m}.

The speed of a wave is the product of its wavelength and its frequency.

v=f\lambda

f=\dfrac{v}{\lambda}

f=\dfrac{343}{0.32}=1070 \text{ Hz}

7 0
3 years ago
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