Can you do test 4 section 4 number 35 please?
This is a very SAT-ish question: the math is pretty trivial, but conceptually the question is still a bit tricky.
There are a couple things you need to have nailed down to get this one right.
First, you need to recognize that they’re asking you for a ratio of two dynamic pressures, so they’re asking you for a ratio of two q‘s. Let’s call them and . We’ll say is the one that corresponds to a velocity of v and is the one that corresponds to a velocity of 1.5v.
Second, you need to make sure you’re providing the ratio that’s asked for: the q of the faster fluid to the q of the slower fluid. Which fluid is faster—the one with velocity v or the one with velocity 1.5v? 1.5v is always going to be a larger number than v, so that’s the faster fluid. Therefore, we need to calculate the ratio of to .