A sound wave travels at a speed of `339 m s^-1`. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?

A bob of mass 0.1 kg hung from the ceiling of a room by a string 2 m long is set into oscillation. The speed of the bob at its mean position is 1 m s^1. What is the trajectory of the bob if the string is cut when the bob is (a) at one of its extreme positions, (b) at its mean position.

The bQB of a pendulum is released from a horizontal position. If the length of the pendulum is 1.5 m, what is the speed with which the bQB arrives at the lowermost point, given that it dissipated 5% of its initial energy against air resistance?

How are the wavelength and frequency of a sound wave related to its speed?

A radio signal has wave length 300 m and speed 3 xx 10^8 m//s . Find out the frequency of the signal.

A train approaching a hill at a speed of 1 Km a minute blows a whistle of frequency 480 Hz.Calculate the frequency which will be recorded byan instrument on the top of the hill.[Velocity of sound = 330 m/s]

A jet airplane travelling at the speed of 500 km h-1 ejects its products of combustion at the speed of 1500 km h-1 relative to the jet plane. What is the speed of the latter with respect to an observer on ground?

Rain is falling vertically with a speed of 30 m s^-1 . A woman rides a bicycle with a speed of 10 m s^-1 in the north to south direction. What is the direction in which she should hold her umbrella?

The equation of a wave is y = 3 cospi(100t-x) cm.its wavelength is

An object moves along a straight line with an acceleration of 2 m/s2. If its initial speed is 10 m/s, what will be its speed 2 s later?