The phenomenon where the sound of a whistle increases as a train approaches and decreases as it moves away is an example of Doppler effect. It occurs due to the relative motion between the source (train) and the observer (listener), ...
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The source that causes the most noise pollution among the options provided is Airplane taking off. Aircraft taking off produce extremely high decibel levels, affecting large areas around airports. This surpasses the noise generated by motor vehicles, railway engines, and ...
If the horse starts moving suddenly, the reason for the possibility of the rider falling is due to inertia. When the horse accelerates, the rider tends to remain at rest due to inertia, causing them to lean backward or fall ...
The working system of a rocket is based on the principle of conservation of momentum. This principle states that the total momentum of a system remains constant if no external forces act upon it, which enables rockets to propel forward ...
When a moving bus suddenly applies brakes, the passengers sitting in it fall forward. This can be explained by Newton’s first law. This law states that an object in motion tends to stay in motion unless acted upon by an ...