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Otrada [13]
3 years ago
10

Light waves

Physics
2 answers:
irga5000 [103]3 years ago
7 0

Answer:

a

Explanation:

Because I searched it up

agasfer [191]3 years ago
3 0

Answer:a

Explanation:

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https://gml.noaa.gov/education/info_activities/pdfs/LA_radiation.pdf

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The cheetahs in Kenya and the cheetahs in Tanzania make up separate _____.
Andreyy89
C. Populations. 
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A book is sitting on a table. Which of the following is true about the table? O A. It is pushing up on the book. O B. It exerts
777dan777 [17]

Answer:

yes it does exert a force, it pushes it up

Explanation:

this is called normal force

if it didn't exert a force the book would keep going down

according to newton every force has an equal amd opposite reaction

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3 years ago
As the drawing illustrates, a siren can be made by blowing a jet of air through 20 equally spaced holes in a rotating disk. The
Aneli [31]

Answer:

ω = 630.2663 = 630[rad/s]

Explanation:

Solution:

- We can tackle this question by simple direct proportion relation between angular speed for the disk to rotate a cycle that constitutes 20 holes. We will use direct relation with number of holes per cycle to compute the revolution per seconds i.e frequency of speed f.

                                  1rev(20 hole) -> 20(cycle)/rev  

                                        2006.2(cycle) -> f ?  

                              f = 2006.2/20 = 100.31rev at second  

- The relation between angular frequency and angular speed is given by:

                                 ω = 2πf

                                 ω = 2*3.14*100.31

                                 ω = 630.2663 = 630[rad/s]

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3 years ago
What types of sound waves diffract more than others
cricket20 [7]

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Infrasound

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