00:01
Hello students, the question first of all we need to find the internal radius of the tank.
00:07
Now we know that the outer radius is 600 nanometer.
00:11
So, calculate the inner radius.
00:18
The inner radius is half of the outer radius that is equals to 584 upon 2 which is equals to 292 nanometer.
00:34
Now we use the formula for circumferential stress in the thin walled cylinder that is sigma theta equals to d upon 2 t where rho is internal pressure, d is the internal diameter and t is the thickness.
00:57
Putting the values for all this we get it 2 into 584 upon 2 into 8 we get the value of sigma theta equals to 146 mega pascal.
01:16
Now finally we need to find the longitudinal stress at the bottom of the tank.
01:22
So, we use the formula sigma z is equals to p r upon t where r is the radius of the tank, t is the thickness.
01:34
We need to find the pressure at the bottom of the tank which is actually the weight of the water above it...