00:01
All right.
00:01
So in this question, we basically have a situation where pressure that you experience underwater increase as you go deeper underwater, which makes sense because there's even at surface level you're being, you have air pressure bearing down on you.
00:17
And then as the deeper you go, the more water above you and you get more even more pressure.
00:24
So in part a, you're supposed to write an equation that relates to this relationship between.
00:30
Pressure and depth.
00:32
So i have to first and foremost, you know, assign a variable for each of those quantities, p for pressure and y for depth.
00:41
Pressure being pounds per inch squared and depth being in feet.
00:45
We don't usually write the units in the equations themselves, so it's nice and neat.
00:53
But anyway, pressure is dependent on depth here, so we write p of y equals some expression.
01:00
In this case, p of y equals 15 plus 4 .34 over 10 y.
01:06
15 is there because that's the pressure when there's zero depth.
01:12
That's why it's a constant term.
01:15
And then the slope is given by the increase in pressure per increase in depth.
01:19
We have 4 .34 pounds per inch squared increase for every 10 feet in descent...