Frequency as the third harmonic of the tube
A guitar string of 80.0 cm of mass 1.50 g is positioned near a tube open at one end and as well 80.0 cm long. What must be the tension in the string so its fourth harmonic consists of the same frequency as the third harmonic of the tube?
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A laser beam in air is incident on the liquid at an angle of around 38.0 degrees with respect to the normal. The angle of the laser beam in the liquid is 27.0 degrees. Find out the liquid's index of refraction?
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