Hey everyone, this is my first post here, I hope this is a good place to put it. I take HL physics for my IB program and thinking of doing the EE on physics. I looked into Bernoulli's principle and thought this would be interesting. A good experiment is having a ping pong ball hover over a stream of air and see at what angle the ball falls off the stream. I then can change the velocity of the air which should change the pressure, ∴ changing the angle. My problem is that I don't know how to find the dynamic pressure because to find that, you need density, but density also changes with velocity and to find density you need pressure. So I'm stuck at this point and don't know what to do!