Answer:
The frequency shift detected is
Explanation:
From the question we are told that
The normal frequency of the state highway patrol radar guns
The speed of approach is
Now the frequency measure by the the state highway patrol radar guns as your car approaches is mathematically represented as
Where c is the speed of light which a has constant value of
Now
=>
substituting values
To solve this problem it is necessary to apply the concepts related to intensity as a function of power and area.
Intensity is defined to be the power per unit area carried by a wave. Power is the rate at which energy is transferred by the wave. In equation form, intensity I is
The area of a sphere is given by
So replacing we have to
Since the question tells us to find the proportion when
So considering the two intensities we have to
The ratio between the two intensities would be
The power does not change therefore it remains constant, which allows summarizing the expression to
Re-arrange to find
Therefore the intensity at five times this distance from the source is
Explanation:
It is given that,
Radius of the circular orbit,
Speed of the electron,
Mass of the electron,
(a) The force acting on the electron is centripetal force. Its formula is given by :
(b) The centripetal acceleration of the electron is given by :
Hence, this is the required solution.