Mathematics, 05.05.2020 09:35 quaseabrough1
The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a source or a receiver. If an emergency vehicle approaches Bob and moves away from Jill, how does the frequency of the siren change?
A) Neither Bob or Jill perceive any change in the frequency of the siren.
B) As an emergency vehicle approaches Bob the frequency appears to increase.
C) As an emergency vehicle moves away from Jill the frequency appears to increase.
D) Bob does not notice any change until the vehicle passes him and the siren increases.
Answers: 1
Mathematics, 21.06.2019 13:00
Use the diagonals to determine whether a parallelogram with vertices u(2,β2), v(9,β2), w(9,β6), and x(2,β6) is a rectangle, rhombus, or square. give all the names that apply.
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Mathematics, 21.06.2019 16:00
Asegment in the complex plane has a midpoint at 7 β 2i. if the segment has an endpoint at 11 β 3i, what is the other endpoint?
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Mathematics, 21.06.2019 17:30
(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .
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