A vibrating tuning fork is held at the mouth of a cylindrical tube in which water is poured gradually. Then for a certain height of water-level in the tube, an intense sound is heard. What is the reason behind it?

A U-tube is partly filled with water. A liquid, immiscible in water, is poured into one arm until the level of the liquid comes to a height h above the water level in the other arm. The water in the second arm is at a height d above its previous level in this arm. Calculate the density of the liquid.

A tuning fork of frequency 256 Hz is held over the open upper end of a 200 cm long vertical tube filled with water. Then water is allowed to escape gradually through the lower end. Find out the positions of the water surface at the 1st and 2nd resonances. Neglect the end error. The velocity of sound in air = 320 m * s^(-1) .

A vibrating tuning fork of frequency 340 Hz is held over a cylindrical pipe. The length of the pipe is 120 cm . Now water is slowly poured into it. What should be the water level at which resonance will occur ? Velociy of sound in air = 340 m*s^(-1) .

A student is performing the experiment of resonance column. The diameter of the column tube is 4cm . The frequency of the tuning fork is 512 Hz . The air temperature is 38^(@) c in which the speed of sound is 336 m /s . The zero of the meter scale coincides with the top end of the resonance column tube. When the first resonance occurs, the reading of the water level in the column is