Why do most coastal regions have two high tides and two low tides?
1 answer:
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Answer: The frequency heard will be f = 275.675Hz
Explanation: When an object emitting sound is moving, it occurs a phenomenon called Doppler shift or Doppler effect. What happens is that the sound gets higher when the moving object comes closer the observer and becomes lower after it passes, This change is due to the quantity of waves that passes through an area in an unit of time.
The formula to calculate the Doppler effect is as follows
f = () · f₀
f is the observed frequency;
c is the speed of sound;
Vs is velocity of the source;
f₀ is the emitted frequency of source;
Substituting and calculating,
f = · 300
f = 275.675 Hz
Thus, the frequency heard by the police officer is 275.675Hz.
Answer:
Explanation:
Given
mass of box
speed of box
distance moved by the box
coefficient of kinetic friction
Friction force
Kinetic Energy of box will be utilize to overcome friction and rest is stored in spring in the form of elastic potential energy