Answer:
c is the answer because it i in a series not a parallel circut.
Explanation:
Answer:
c. 337
Explanation:
can someone answer my question
The answer that you are looking for is D.
Answer:
Explanation:
In the first case you can use the expression for the Doppler effect when the source is getting closer and getting away
( 1 )
( 2 )
f' = perceived frequency when the source is getting closer
f'' = perceived frequency when the source is getting away
f = source frequency
v = relative speed
vs = sound speed
by dividing (1) and (2) you have

but this is the relative velocity, you have that

a. hence, the speed of the police car is 102.5m/s