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

A source oscillates 50 times in 5 s. If the distance between compression and rarefaction of the medium is 10m, find out the frequency, wavelength and speed of the wave.

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 wire is under tension of 32N and the length between the two bridges is 1 metre.A 10 metre length of the sample has a mass of 2g.Deduce the speed of transverse waves on the wire and the frequency of the fundamental.

A ball is projected vertically upward with a speed of 50 m/s. Find the time to reach the maximum height,

A monochromatic source of light operating 200W emits 4xx10^(20) photons/sec. Find the wavelength of the light. Given h=6.63xx10^(-34)J-S,C=3xx10^8m//s .

A person has a hearing range from 20 Hz to 20 kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344 m s^-1 .

A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10^- 5 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10^-5 m^2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?