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Alekssandra [29.7K]

3 years ago

13

According to the Droppler effect, what appears to happen when a light source moves further away from an observer? (20pts)

2 answers:

sukhopar [10]3 years ago

8 0

THE CORRECT ANSWER IS (A) @SOPHIAM3347 HAS GIVEN THE CORRECT ANSWER ALL CREDIT TO THEM :)

sweet-ann [11.9K]3 years ago

4 0

I think so not take my answer because I think the answer is b

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Complete Question

The complete question is is shown on the first uploaded

Answer:

The elastic potential energy at point B is $PE_{elastic} = 50J$

The kinetic energy at point D is $KE = 75J$

Explanation:

Looking at the given point we can observe that mechanically energy(i.e potential and kinetic energy ) is conserved and it value is $E_ {m} = 100J$

So at point B

$E_{m} = PE_{elastic} +KE$

$100 = PE_{elastic} + KE$

KE at point B is 50J

So $PE_{elastic} = 100 - 50 = 50J$

Now at point D

$E_{m} = PE_{elastic} +KE$

$PE_{elastic}$ at point D is 25J

So $KE = 100 - 25 = 75J$

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