Recent content by gamz95

Yes it is indeed frictionless. Therefore, when normal energy equation constructed the KE1=KE2(Since it says that velocities are the same). However, how is this physically possible? And question gives a changing velocity profile(not a constant velocity).

In the example, is it possible to have same velocities at the two ends of the tube? How would you construct energy conversation equation?

Thank you for your understanding Sir. But why writer referred to the gravity, instead of saying the friction?:)

There is friction forces also?

In that case, gravity forces(weights) and pressure forces acts. Assume that fluid stands still at vertical position.Let's also say that the top of the tube has a pressure of P2, and the bottom has P1, and P1>P2 ; since it is deeper than top. Then, assume now fluid starts to move downward; so...

No sir. I am okay with that pressure can vary with the height. But what I don't understand is how pressure only affected due to gravity. I had wanted to say gravity, but incidentally I wrote rho. My problem is with :"by the pressure gain due to gravity" .

Pressure= rho*g*h; that is okay. But, rho doesn't change with the height, so how is it possible gaining by gravity?

"For a particular flow rate, the pressure drop due to the downward flow of the fluid is balanced by the pressure gain due to gravity—that is, at this flow rate, the static pressure in the pipe is independent of the distance along the pipe." Book says this. Can you explain how the pressure...

Thank you. I kind of understand now. It would be perfect if I can see these relationships drawn in a paper though:)

Yes, in this case makes sense. But, then we couldn't say that drag is opposite of the motion, right? Because we think aeroplane as fixed? Aha! So, we are saying that wind speed and the drag in the same direction, right? When we run with wind, drag is with us? When we run towards the wind, drag...

In the aeroplanes, the drag is in the opposite way of the direction of the aeroplane. My questions for wind turbine: 1) Why "wind speed" and "the drag on the blade" is in the same direction? Shouldn't be the opposite? 2) Are freestream velocity and the wind speed same thing? 3) Are the drag...

Dear Chet, Thank you very very very much. Gamze.

I completely understand Chet. What about case 2? Would you give the same plan like the Case 1: ("If you hold the pressure constant and add heat, The temperature and pressure will not change as long as liquid water remains present The volume of liquid and vapor in the cylinder will increase...

Chet and riggs, thank you very much to you. By the way, I am from Turkey, and we share very different time zone:) One question though; also piston won't go upward before liquid starts to transform, right?

Thank you very and very much Chet. Case 1: *Pressure will not change, okay; but, temperature should rise, because we are giving heat into system (Q=m*c*DT ?). *The volume of vapor increases, okay; but, volume of liquid should be constant as long as liquid remains or decreases as long as there...