How to find the pressure at a given depth in FRESH water.

Everything I have shown you so far will also work for questions in fresh water.  All you need to do differently is calculate the pressure at the depth in the question differently.

Here is how you do that:

Now lets look at using the First depth / second depth method.

This is a different method to the 1,2,3 approach we have used so far. I actually prefer it, but some people find it more confusing. I think it is quicker.

This method is VERY useful when the question you get has fractions in the question and answer. You will see what i mean when you get to example 4........

Example 2

Example 3

Example 4