here's the first part but for the 2nd one all I know is that the word "compression" goes on the spirals that are closer together.
hope this helps!
C., used in power plants I think.
Answer and Explanation:
Limitation of Doppler shift :
The Doppler impact is relevant when the speeds of the wellspring of sound and spectator are considerably less than the speed of sound. The movement of both the spectator and the source is along a similar straight line.When movement is not in straight line or velocity is not much less than speed of light then we can not use Doppler shift
This is the limitation of Doppler shift to determine the object distance
Answer:
27.82 m/s
Explanation:
The radius of the hose is half of its diameter

So its area must be

The speed of water coming out of the hose is its flow rate divided by the cross-section area of the hose
