00:01
Okay, we have an alpha particle that's moving in a magnetic field.
00:05
The magnetic field has a magnitude of 1 .8 tesla.
00:10
The velocity of the alpha particle is 3 .56 times 10 of the 4 meters per second.
00:16
It's given to us as 35 .6 kilometers, but we automatically convert to meters.
00:22
The mass is 6 .64 times 10 to the minus 27 kilograms.
00:27
The charge is basically twice an electron charge, but positive.
00:33
So it's 3 .6 times 10 of the minus 19 kouloms.
00:37
And i'm going to point out that the diameter of a circle is twice the radius.
00:43
Okay.
00:45
So for part a, we want to find the diameter.
00:49
It's easiest to find the radius.
00:53
We can use the formula because we know it's moving in a circle...