Answer:
Explanation:
Let the velocity of observer the driver be V₀ and the velocity of police car the source be. Let V be the velocity of sound in air.
The apparent frequency f is given by the following relation
F is real frequency.
Now F = 2600,
Putting these values in the equation
f = 3146 Hz.
b ) After the police passes , the sign of velocity of observer and source get reversed.
f = 2175 Hz
c ) When the police car is also going northward and trying to overtaking the driver the frequency is calculated as follows .
f = 2799 Hz
When the policy car already crosses the drives the frequency will be as follows
f = 2445 Hz
According to newton's first law of motion, friction is required to make an object slow down. It <span>is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. It opposes the force being applied in an object. Hope this answers the question.</span>
Answer:
We conclude that star moving toward observer.
Explanation:
According to the theory of doppler effect of light.
There are two kind of shift 1 ) Blue shift 2 ) Red shift, in which
1 ) if source of light moving toward observer so the apparent frequency of light increase( wavelength decrease ). This is which we call blue shift
2 ) if the distance between source and observer is increase, so the apparent frequency of light decrease ( wavelength increase ). This is which we call red shift.
Here, in our case wavelength of H-star is decrease so we can say that star moving toward observer ( Blue shift ).