3 ms·
That's basically saying that it's sucking air from all directions, not predominantly from the direction the pipe is facing. Counterintuitive to say the least.
by jojobas 3y ago
That's basically saying that it's sucking air from all directions, not predominantly from the direction the pipe is facing. Counterintuitive to say the least.
- snewman 3y agoMy understanding here is shallow, but I think you are correct. Here's a simple exercise to help your intuition: open your hand up flat, and hold it facing your mouth, a few inches away. Blow, and you can easily feel the air pressing on your palm. Now inhale sharply; your hand will feel no suction at all.
- jojobas 3y agoThat's true, but all the air molecules entering a tube aligned with X axis have negative momentum along X. You'd think this means the total X momentum of all molecules become more positive.