When you hear the horn of a car that is approaching you, the frequency that you hear is larger than that heard by a person in the car because for the sound you hear A the speed of sound in air is increased by the speed of the car. (B) the car gets ahead of each wave crest before it emits the next one. a speeding car emits more wavecrests in each period. D wave crests are closer together by the distance the car travels in one period. E wave crests are farther apart by the distance the car travels in one period.

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Q: Derive equation.

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Q: 60v R₁ = 62 W R3 = 100 -W- R₂= 1492

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Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.