0:00
Hello.
00:02
So since we want to find time, energy consumed in this concept or in this context is going to be the power times the time.
00:16
But from electricity, power is iv.
00:19
And so we can say ivt.
00:23
Right.
00:23
And so if you isolate time, you're going to have e over iv.
00:30
Okay.
00:31
So that's going to be our first step.
00:33
Now, what is e? so that's the energy required to raise the temperature of the tissue and ball the water.
00:41
So that energy is going to be equal to mc changing temperature plus so that's m1 and then it's m2 lv to latent heat of vaporization.
01:06
Okay, so here m1 is going to be the mass of the tissue, right? then m2 the mass of the water so this one right here is the mass of water okay and then m1 is the mass of t -sheet and so if you bring that back into this formula we're going to have t equals m1 c changing temperature plus you have m2 lv is a little heat of vaporization.
02:00
Then the current times the potential difference.
02:06
So at this point, we are ready to substitute for, to get our time.
02:19
So let's see.
02:26
So the mass of the tissue is one gram.
02:33
You want this in two grams, so you're 1 .5 times 10 to the negative 3.
02:38
Okay.
02:39
Okay, that's a kilogram.
02:41
The specific heat capacity is 300 plus the mass of the water is 0 .5 grams.
03:00
We want that in kilograms.
03:02
We're going to matter by 10 to the negative 3...