Fluids (part 11)

[LNasterio]

You solved a question of mine that my lecturer couldn't answer. (I am from a really high world ranking Uni)

Really Well done.

One thing though, you keep calling "rho G H" "P G H" which is not right. Can you please address that.

Again, Thank you so much for your video!

[kristenicole1982]

I can't thank you enough for these tutorials! Now I understand! You're amazing!

[seanplaysmusic]

that first point you made is exactly what I wanted to be clarified, so thanks!

[ppapimara]

Because the Areas being analyzed vary (the cross section), the velocity varies and therefore the pressure changes as well. (Pressure depends on height as well as speed flow). Because there is a variation in velocity, there is acceleration- and the force present causing this acceleration is applied by the surrounding fluid- therefore the pressure must vary when A varies, even if there is no variation in height.

[slmUSA]

Thank you!

[shiza223]

You are a real life hero!!!

[99miyah]

If there was a vacuum inside the cup but not outside, would P1 equal zero and P2 equal 1atm?

[7025Nikhil]

wonderfull

[Oh4Chrissake]

@Froody1911 Hey, I was just going to say that!

[onlyAerik]

aha. Another guy and I were discussing the problems with this situation if the vacuum only existed in the canister. If that were true, you'd have 1atm external pressure at A2. The situation was more analogues to soda held in the tip of a straw then a pipe.

[julberry1]

so how do you explain the trick they do with the bottle of water, they turn it upside down and the water doesnt fall... it doesnt comes out? i tryied it but it doesnt work :)

[patilnikh]

Centripetal acceleration, if the acceleration @ which the person is speeding the bucket (rotation) with water is > than 9.8m/s2 , water won't fall out as the force is towards the centre!!!!

[dst7ssa]

A few more examples with numbers other than zero will be great. Thanks a lot.

[Laminaricflow]

These Bernoulli's principle vids are very clear and bright teachings, worth all 5 stars!

When you put an example of a principle, I would like to see some numbers also instead of zeros, like pressures in a vacuum. So could you put a few more fluid flow examples with numbers greater than zero. Thanks.

[anava84]

Answered my questions from the last video. Thanks!