Draw and find the frequencies of first 2 harmonics for following tubes a. A tube open at both ends (tube length is L) b. A tube open at one end (tube length is L) c. You blow into an open tube and produce a tone. What happens to the frequency of the tone if you close to it again?

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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.