A: Yeah, that's an interesting question. So generally speaking when you're using the Bernoulli or modified Bernoulli equation, a lot of times what we're after, why we're using it, is we're trying to figure out the pressure that's being added by a pump, the delta P, and that can be in PSI, or we may be looking for the head added by a pump, so we may be treating that as H sub A, so we're looking for that in feet, but either way we're talking about how much pressure is being added by a pump. But the vapor pressure, right, which is the function of the temperature as you've stated in your question, is present on both sides of the pump.