A 20g string is used to create a standing wave. The frequency of the 4th harmonic is 300 Hz and the wavelength of the 2nd harmonic is 2.3m.  a. What is the speed of the wave? b. What tension force was required to produce the standing wave?

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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.