00:01
Okay, so to solve for this, we're going to use this equation.
00:05
The formula for work done.
00:06
Work is equivalent to negative p that's pressure multiplied by the change in volume.
00:13
So that means this is change in volume is v2 minus v1.
00:19
We need to calculate first for v1, v1, v1.
00:24
Since we have here a sphere, okay, so formula for a sphere, 4 3rd, 5 .1.
00:31
Our cube right so we have four thirds by we have diameter so that's 0 .5 divided by 2 then don't forget the resistor part of 3 and you should get 0 .0 6 5 4 this is cubic there's that's v1 and then for b2 we need to find first for the radius right so it is stated here that the pressure inside the balloon is directly proportional to the square of the diameter.
01:06
Alright? so pressure will be equivalent to a diameter squared.
01:11
So we know that pressure is 5.
01:14
Okay, that's 5 bar and then here in the square.
01:18
So taking the square with both sides of the equation, we've got the diameter is 2 .2361, right? and then you can now solve for v2...