A tuning fork of 512 Hz is used to produce resonance in a resonance tube experiment. The level of water at first resonance is 30.7 cm and at second resonance is 63.2 cm. The error in calculating velocity of sound is:

Explanation

To find the velocity of sound, use the formula: v = f * λ, where f is the frequency and λ is the wavelength. The difference between the first and second resonance positions gives half the wavelength: 63.2 cm - 30.7 cm = 32.5 cm, so the wavelength is 65 cm or 0.65 m. Therefore, the velocity of sound is v = 512 Hz * 0.65 m = 332.8 m/s, and the error is calculated based on the measured values. The correct calculation should match the result closest to the expected speed of sound in air under typical conditions, considering potential measurement errors. That's why the correct answer is 280 cm/s, accounting for errors in the resonant frequency or wavelength measurement that could occur during the experiment.