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REY [17]
3 years ago
7

Prettiest of pleasese please help me

Mathematics
2 answers:
yan [13]3 years ago
8 0

Answer:

180 degree rotation

Step-by-step explanation:

This a parallelogram, thus a 180 degree rotation would make the figure appear to be the same.

Dafna11 [192]3 years ago
8 0

Answer:

D. 180° rotation

Step-by-step explanation:

Alright, since you said prettiest of please.

The figure reflected across any vertical or horizontal line will not fold completely over itself. If rotated 90° either way (clockwise or anticlockwise) it would still not cover itself completely. But if rotated 180° either way (clockwise or anticlockwise), then it would cover itself completely and congruently.

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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
erma4kov [3.2K]

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:

B. open at one end and closed at one end .

Step-by-step explanation:

Given:

Length of the pipe, L = 120 cm

Its wavelength \lambda_1 = 480 cm

                         \lambda_2 = 160 cm and \lambda_3 = 96 cm

We have to find whether the pipe is open,closed or open-closed or none.

Note:

  • The fundamental wavelength of a pipe which is open at both ends is 2L.
  • The fundamental wavelength of a pipe which is closed at one end and open at another end is 4L.

So,

The fundamental wavelength:

⇒ 4L=4(120)=480\ cm

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

Now lets check with the subsequent wavelengths.

For one side open and one side closed pipe:

An odd-integer number of quarter wavelength have to fit into the tube of length L.

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

⇒ \lambda_2=\frac{4(120)}{3}                              ⇒  \lambda_3=\frac{4(120)}{5}

⇒ \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 .

6 0
3 years ago
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podryga [215]
11 Is the answer I think
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3 years ago
A particular type of cell triples in number every hour. Write a function that models
GREYUIT [131]

Answer:

part 1: white blood cells

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Step-by-step explanation:

I hope this is correct pls let me

know in the comments below if i am correct

6 0
3 years ago
Volume: The base of a pyramid is a rectangle with a length of 3 centimeters and a width of 6 centimeters. If the height of the p
il63 [147K]

Answer:

72 cm³

Step-by-step explanation:

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3 0
2 years ago
Plz complete the table.
Tresset [83]

Answer:

32

Step-by-step explanation:

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