00:01
We'd like to determine the pressure at the elbow inlet section.
00:06
So to determine this pressure, we're going to want to first calculate our flow rate, our calculator velocity.
00:15
We have q is equal to pi over 4 d1 squared times v1.
00:19
So we can plug in our values to solve for v1.
00:23
V1 is 2 .25 meters per second and v2 is 20 .3 meters per second.
00:30
Now we can apply bernoulli's equation between the elbow entrance and the exit.
00:38
So we want to find our pressure.
00:40
We can write pressure 1 divided by density times gravity plus v1 squared over 2g plus z1 equal to pressure 2 over density times gravity plus v2 squared over 2g plus z2.
00:57
So we have our pressure.
00:59
We don't know what pressure 1 is.
01:00
We want to calculate that.
01:02
We have v1.
01:03
Our density is 1000...