[1kWh=..........J],[0.3.6times10-6J],[013.6times106J],[0.6times106J],[0.6times10-6J]

The average thermal energy of oxygen at a temperature of 27C (А) 6.2times10^(-21) J (В) 4.5times10^(-21) J (C) 3.5times10^(-21) J (D) 1.2times10^(-21) J

Show that kWh=3.6 times 10^5 J

1 KWh=_______ A. 36xx10^6J B. 3.6xx10^6 J C. 0.36xx10^6 J D. 3.6 J

" Wavelength associated with a Helium atom moving with a velocity of "10^(5)cms^(-1)" is (Atomic mass of "He=4amu;N=6times10^(23);h=6.625times10^(-34)J_(8)" ) "

The photoelectric threshold wavelength for Potassium having work function of 2eV is.......... (Take h= 6.6 xx 10^(-34) J s. 1 eV = 1.6 xx 10^(-19) J , C = 3 xx 10^8 Ms^(-1) )

True or false 1kWh=3.6xx10^9 J

The frequency of a Photon having energy 100 eV is ...... Hz. (take h = 6.62 xx 10^(-34) Js, 1eV = 1.6 xx 10^(-19) J)

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