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quester [9]
3 years ago
9

9. m+3 ]=7 How do you do this

Mathematics
1 answer:
LekaFEV [45]3 years ago
4 0

Answer:

m=4

Step-by-step explanation:

7-3=4................

hope that helps

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A pipe that is 120 cm long resonates to produce sound of wavelengths 480 cm, 160 cm, and 96 cm but does not resonate at any wave
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Answer:

A Pipe that is 120 cm long resonates to produce sound of wavelengths 480 cm, 160 cm and 96 cm but does not resonate at any wavelengths longer than these. This pipe is:

A. closed at both ends

B. open at one end and closed at one end

C. open at both ends.

D. we cannot tell because we do not know the frequency of the sound.

The right choice is:

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Step-by-step explanation:

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Length of the pipe, L = 120 cm

Its wavelength \lambda_1 = 480 cm

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So,

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It seems that the pipe is open at one end and closed at one end.

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For one side open and one side closed pipe:

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⇒  \lambda_2=\frac{4L}{3}                                   ⇒  \lambda_3=\frac{4L}{5}

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⇒ \lambda_2=\frac{480}{3}                                  ⇒  \lambda_3=\frac{480}{5}

⇒ \lambda_2=160\ cm                           ⇒   \lambda_3=96\ cm  

So the pipe is open at one end and closed at one end .

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Answer:

In picture...

Step-by-step explanation:

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✌️

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