00:01
In this question here, e equals to 142 of e knot.
00:06
So here, let's see first part.
00:09
So here, the equation for total energy is e equals to e node plus kinetic energy.
00:17
So substitutes the value of e in our equation is.
00:20
So here, 142 of e node is equals to e node plus kinetic energy.
00:27
So here, kinetic energy will come 142.
00:30
Of e node.
00:34
So here kinetic energy is equals to 141 of e0.
00:42
So this is our answer for first part.
00:45
So here the kinetic energy therefore the kinetic energy of the electron is 141 times larger than its rest energy.
01:01
So this is our answer for first.
01:03
Now let's let's see second part.
01:05
So here the kinetic energy of electron is 141 of e node.
01:14
So here 141 of mc square.
01:20
So here 141 multiply by 9 .1 multiplied by 9 .1, multiply by 10 power 31, multiply by 3 multiply by 10 power 8 whole square.
01:36
So here when we calculated we get kinetic energy is equals to 1 .15 multiply by 10 power minus 11 jule...