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Sedaia [141]
3 years ago
12

The Doppler effect suggests that sound waves are relative to the observer. You know if an object is coming or going from the sou

nd it makes. Light waves follow the Doppler effect also. However, instead of sound changing, you know if an object is coming or going _____.
a-from the brightness of the light
b- from the color of the light
c- from the twinkle of the light
d- from the sound of the light
Physics
2 answers:
mrs_skeptik [129]3 years ago
5 0
A. Form the Brightness of the light
Serhud [2]3 years ago
3 0

a.....................

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Calculate the work done by an applied force of 76.0 N on a crate for the following. (Include the sign of the value in your answe
telo118 [61]

Answer:

a) 400.4Joules

b) 262.69Joules

Explanation:

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Workdone = Force × Distance

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Force = 76N

Distance= 5.2m

Work done = 77 × 5.2

Work done = 400.4Joules

b) If the force is exerted at an angle of 41°

Work done = Fdsin theta

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