1very easy for first u just have to apply the condition of resonance in an closed organ pipe, and for second just subtract a factor of Vpg from the weight of the stone
Q Atuning fork of frequency 340 Hz is sounded above a cylindrical tube 1m high. water is slowly poured into the tube . if the speed of sound is 340m/s at what levels of water in the tube will the sound of fork be appreciably intensified?
ANS:25cm, 75cm
Q a stone hangs from the freee end of a sonometer wire whose vibrating length when tuned to a tuning fork is 40 cm . when the stone hangs wholly immersed in water the resonance length is reduced to 30cm. the relative density of the stone is_________
ANS: 16/7
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