Acoustics Answers

in an experiment involing an ideal gas the pressure (p) of the gas is plotted against the reciprocal of the volume ( 1/v ) of the gas at constant temperature.

A sound wave propagates in an open tube of length L = 10 cm. Find the frequency f2 of the second harmonic (n=2) and the angular frequency ω4 of the fourth harmonic (n=4). (Vsound= 340 m/s)

a siren paced at a railway platform is emitting sound of frequency 5000 hz . a passenger sitting in a moving train A records a frequency of 5.5 khz while train approaches the sirens .during his return journey in a different train B he records a frequency of khz while approaching the same siren . the ratio of the velocity of train B to that of train A is??

A body hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of
3ms−2
and the balance reads 50 N, what is the true weight of the body?

A 150-kg ladder leans against a smooth wall, making an angle of 30 degrees with the floor. The centre of gravity of the ladder is one-third the way up from the bottom. How large a horizontal force must the floor provide if the ladder is not to slip?

A rope suspended from a ceiling supports an object of weight W at its opposite end. Another rope tied to the first at the middle is pulled horizontally with a force of 30N. The junction P of the ropes is in equilibrium. Calculate the weight W and the tens

A 50kg boy suspends himself from a point on a rope tied horizontally between two vertical poles. The two segments of the rope are then inclined at angles 30 degrees and 60 degrees respectively to the horizontal.The tensions in the segments of the rope in

Calculate the work done against external atmospheric pressure when 1 g of water changes to
1672cm3 of steam. Take the atmospheric pressure as 1:013×105Nm−2