Find de-Broglie wavelength of neutron at `127^@ C`. `(Given Boltzman constant = K =1.38 xx 10^-23 J molecule^-1 K^-1, h = 6.63 xx 10^-34 Js, Mass of neutron = 1.66 xx 10^-27 kg)`

Calculate the value of Bohr Magneton (Given: Charge on electron = 1.6xx10^-19 C, h (Planck's) constant = 6.63xx10^-34Js, mass of electron m_e = 9.1xx10^-31 kg)

A planet with the diameter and mass, both one third of those of the earth has surface temperature around 1000 K. Is it possible to find oxygen molecules around the atmosphere of the planet? (Given: Boltzmann constant = 1.38 xx 10^-23 J/K , Mass of oxygen molecule = 5.3 xx 10^-26 kg )

Calculate the de Broglie wavelength of proton, if its speed is 10^7 cm//s . Given: mass of proton = 1.67 xx 10^-27 kg .

If wavelength of photon is 2.2 xx 10^-11m , h = 6.6 xx 10^-34 Js , then momentum of photon is_____.

Find the wavelength for a beam of neutrons, whose kinetic energy is 100 eV. Given mass of neutron = 1.676 xx 10^-24g .

Show that (1 kWh = 3.6 xx 10^6J ).

The radius of the second Bohr orbit for hydrogen atom is________. [Plank's constant, h = 6.6262 xx 10^-34 Js mass of electron = 9.109 xx 10^-31 kg charge on electron, e = 1.602 xx 10^-19 C]

Find the de-Broglie wavelength associated with an electron moving with velocity 0.3 c. rest mars of electron, m0 = 9.1 ×10–31 (k/s) h = 6.63 × 10–34 Js)

Calculate the de Broglie wavelength of an electron moving with (1/3)rd of the speed of light in vacuum.(Neglect relativistic effect) (Planck's constant : h = 6.63 xx 10^-34 js , Mass of electron : m = 9.11 xx 10^-28 g )

Calculate the average molecular K.E:- per molecule of oxygen at 127^@C given that molecular weight =32, R = 8.31 J mol^-1 K^-1 , N_A = 6.02 xx 10^23 , T =127^@C