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qUESTIONS

The equation of a transverse wave travelling on a rope is given by y=10sinπ (0.01x-2.00t) where y and x are in cm and t in seconds. The maximum transverse speed of a particle in the rope is about

An organ pipe is closed at one end has fundamental frequency of 1500 Hz. The maximum number of overtones generated by this pipe which a normal person can hear is

A uniform string of length 20m is suspended from a rigid support. A short wave pulse is introduced at its lowest end. It starts moving up the string. The time taken to reach the support is

While measuring the speed of sound by performing a resonance column experiment, a student gets the first resonance condition at a column length of 18cm during winter. Representing the same experiment during summer, she measures the column length to be x cm for the second resonance.

A source of sound is travelling towards a stationary observer. The frequency of sound heard by the observer is of three times the original frequency. The velocity of sound is v m / sec . The speed of source will be

A train moves towards a stationary observer with a speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f1. If the speed of the train is reduced to 17 m/s, the frequency registered is f2. If the speed of sound is 340 m/s , then the ratio f1/f2 is

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 176 Hz, while both of them move towards a stationary siren of frequency 165 Hz. Calculate the speed of the motorcycle, if it is given that motor cyclist does not observes any beats. (velocity of sound in air = 330 m/s)

A train is moving on a straight track with speed 20m/s. It is blowing its whistle at the frequency of 1000Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is close to:

Two waves y1 =Acos (0.5πx-100πt) and y2=Acos(0.46 πx-92πt) are travelling in a pipe placed along x-axis, where x is in metres and t is in seconds. Find the number of times intensity is maximum in time interval of 1 s

A police car with a siren of frequency 8kHz is moving with uniform velocity 36 km/h towards a tall building which reflects the sound waves. Speed of sound in air is 320m/s. Frequency of siren heard by car driver is

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