Part A A student uses a 2.00-m-long steel string with a diameter of 0.90 mm for a standing wave experiment. The tension on the string is tweaked so that the second harmonic of this string vibrates at 26.0 Hz. (p -7.8-10' kg/m) Calculate the tension the string is under. Express your answer using two significant figures. Fr Submit Beauest Answer Part B Calculate the first harmonic frequency for this string Express your answer using three significant figures. Hz fi=

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