The kinetic energy of an electron is 4.55×10−25 J. The mass ofelectron is 9.1×10−31kg. Calculate velocity of the electron.
103 ms-1
Calculation of the velocity of energy:
Kinetic energy =12mv2=4.55×10−25 J
=4.55×10−25k gm2s−2
Or v2=2×KEm=2×(4.55×10−25kg m2S−2)(9.1×10−31kg)
=106m2s−2
Or velocity (v)=(106m2s−2)12=103ms−1