00:01
Okay, so the question is asking about thermal energy.
00:07
And there's three parts to it.
00:09
The first part asks what the thermal energy is at room temperature.
00:14
So let's define that where the thermal energy is given by kt.
00:24
Okay.
00:28
And what is k? k is the boltzman's content.
00:32
And that is given by 8 .62 times 10 to the minus 5 electron volts per kelvin.
00:49
Okay, not to be confused with, let's just call this, we'll call this kb.
00:54
Okay, so we don't get the units mixed up there, or the symbols mixed up.
01:00
Okay, so the first part, room temperature.
01:04
What is room temperature? room temperature is usually taken to be 20 degrees celsius okay and in kelvin that would be 293 kelvin kelvin being celsius plus 273 so all we have to do is is calculate kbt okay and that's 8 .62 times 10 to the minus 5 electron volts per kelvin times 293 kelvin.
01:50
And that works out to roughly 0 .025 electron volts.
02:00
And that's equal roughly to 1 over 40 electron volts.
02:08
Okay.
02:08
Okay...