0:00
Hello.
00:02
So for this question we're going to be using the concept of mass defect.
00:09
Okay, so we'll get the answer.
00:14
So what we're going to do now is to write down the equation.
00:17
So we have a neutron.
00:20
So when a neutron decays, what you're going to get is a proton plus an electron plus an antinitranor.
00:34
So remember this one is zero.
00:36
This is one, this is one, zero, negative one.
00:39
This is this.
00:39
This is a proton.
00:40
This is a proton.
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This is a electron.
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This is a proton.
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This is a electron.
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This is a electron.
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This is a little.
00:40
This is a has no child it is zero zero okay so it's balanced so we need to get the mass of the neutron the proton and the electron and we're going to get a mass in a mega electron volt per speed squared this is going to look like so for the mass of the neutron that's going to be nine thirty nine point five six five five five five so these are just constants you can look at, okay? that's the mass of the neutron.
01:25
Mass of the proton 3938 -2 -272 -013 omega -electron volt over c squared.
01:41
Then the electron mass is going to be 0 .51099 -891 one electron volt for c squared.
02:00
The mass of the antinitrinal is negligible because it's less than one electron volt, okay? so it's negligible.
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Now when you look at this, you realize that there is a difference, there's a defect.
02:15
Or we can, you know, confirm that...