There was a question on a quiz I just took and I want to make sure I got it right. Something like: "A beaker filled with to [itex]2/3[/itex] its height with a fluid of density ρ = 1500kg / m3. You place a straw in the fluid such that the fluid in the straw is at a height equal to that of the fluid prior to having a straw put in (i.e., the height of the fluid is still [itex]2/3[/itex] of the max height). You suck the fluid in the straw up 25cm. What is the pressure in your mouth?" After a good while of trying to overthink it (using Bernoulli's principle) I figured that it would just be ρgh = (1500kg / m3)(9.81m / s2)(0.25m). Is it right or wrong? It may very well be the difference between an A and a B so it'll just kill me to not know 'til I find out my grade Monday.