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 1.5*v*.

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 1.5*v*? 1.5*v* 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 .