THE DOPPLER EFFECT
1. TRUE or FALSE:
Ken Fused is standing on a corner when a police car passes by with its siren on. Ken hears a
different pitch when the police car is approaching him than when it is past him. This is
because the siren on the front of the car is set to a higher pitch than the siren on the back of
the car.
2. Describe the real reason Ken Fused observes what he does.
3. TRUE or FALSE:
The Doppler shift is a phenomenon that is observed only of sound waves.
Explain your
4. TRUE or FALSE:
As the source of a sound approaches an observer, the loudness of the sound increases. This
is an example of the Doppler Shift.
Explain your

Explanation:

1 ) False . The reason given in the problem is wrong .

2 ) When a source of sound approaches an observer , the frequency of the sound appears of having higher frequency . When it goes away from the observer , its sound  appears of having lower frequency . This is due to the phenomenon of  Doppler's effect .

3 ) The statement is false.

Doppler shift is a phenomenon which is found in light also . The frequency of light from distant stars coming towards the earth appears to have blue sift signalling increasing frequency . It is similar to doppler shift in sound.

4 ) The statement is true . When the source of sound approaches an observer , its intensity appears to increase due to apparent increase in the frequency due to Doppler's shift.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the closer the planet is to the sun, the larger the gravity