Originally Posted by

**adam0321**
I have come up with the idea of using a seal a meal in class to show them how a bag(lungs) filled with marshmellows(gas) is full on the surface but at depth becomes compressed and therfore alowing more room for more marshmellows. and how at surface the preasure the marshmellow exerts on the bags(lungs) is not that great but how at depth they are pushing harder on the bag therfore becoming absorbed into the tissues more rapidly. this way I cover boyles.henerys,and daltons law all at once.

I am having a hard time showing how 32% nitrox is .76ppo2 at 45' but 1.58ppo2 at 130'. so 32%on surface is like 132% at 100'(just an estimate not actualy doing the math) I can do the equation and show them but its hard to explain and visualize why it is