In nuclear reactors,neutrons travel withenergies of` 5xx 10^-21 J`. Find their speed and wavelength.

The energy of a photon is 10 xx 10^-19J .Calculate its wavelength.

The work function of silver is 5.26 xx 10^-19J . Calculate its threshold wavelength.

If the energy of a photon corresponding to a wavelength of 6000 Å is 3.2 xx 10^(-19) J , the photon energy for a wavelength of 4000 Å will be

An electron travelling with a speed of 5 xx 10^3 m/s passes through an electric field with an acceleration of 10^12 ms^-2 . How long will it take for electron to double its speed?

An electron travelling with a speed of 5x 10^3 m/s passes through an electric field with an acceleration of 10^12 m/s^2 . How long will it take for electron to double its speed?

A sound wave of frequency 8000Hz travels with a speed of 340 m//s in air. Find its wavelength.

The photoelectric work function of a photo-sensitive metal is 3 xx10^-19 J. Calculate the threshold wavelength.

A bob a simple pendulum performs S.H.M. of amplitude 2 cm. If the mass of the bob is 100 gram and its total energy is 32 xx 10^-5 J . Find the periodic time of S.H.M.