00:01
Okay, so we know the total energy is equal to 6 .5 mega -electron 4.
00:04
And we also know that based on the equation, the total energy square is equal to the rest energy square plus momentum times speed of light square.
00:14
Therefore, pc is equal to e total square minus e square.
00:17
P is equal to square root e, square total minus e square.
00:21
Therefore, p is equal to 1 over 3 times e total square minus e square.
00:26
And if we expand the rest energy turns, you give us p is equal to 1.
00:31
Over c times e total square minus mc squared square square.
00:35
We know the mass of electrons 9 .11 times 10 to power negative 31 kilograms.
00:39
And c is equal to 3 times 10 to power of 8 meters per second...