I followed your same reasoning. It is obvious that they subtracted out the rivet diameter, but my guess is that they should do it for each side. I think it's just a poorly-written problem.
Homework Statement
My professor has given us the solutions to the problem, but I am having a hard time decoding what exactly is going on from the solutions, especially in parts B and C.
For Part B: I understand where the numbers are coming from and that this is a force balance problem...
I hope this question doesn't have too obvious of an answer.
Basically, I still cannot grasp why Bernoulli's equation applies for wind tunnels and pitot-static probes. According to my textbook ("Introduction to Flight" by Anderson), Bernoulli's equation holds only when comparing two points...