Apolice car on the side of the road (at rest) uses a radar gun to catch speeders as they approach it. the frequency the radar gun emits is 8 x 109 hz and the speed limit is 65 mi/hr. what is the difference in frequency of the emitted and returned radar wave

Explanation:

Apparent frequency that is received to the speeder is given as

here we know that

now we have

now the frequency that is received back from the speeder is given as

So difference is the frequency is given as

33: i think it’s b

pe = weightxheight = 2000x1000=2,000,000joules