How Does Fluid Velocity Compare at Different Points in a Siphon Tube?

  • Thread starter Thread starter nath_quam
  • Start date Start date
  • Tags Tags
    Tube Velocity
AI Thread Summary
In a siphon, the fluid's velocity at the top of the tube is related to the velocity of the exiting fluid at the bottom. Since no fluid is lost or created, the volume flowing in equals the volume flowing out, implying that the velocities must be equal if the tube's diameter remains constant. The discussion suggests that the term "velocity" may have been misused in the question, leading to confusion. The conclusion drawn is that the velocity at the top and bottom of the siphon tube is the same. Understanding these principles is crucial for accurately answering questions about fluid dynamics in siphons.
nath_quam
Messages
13
Reaction score
0
A siphon has been started, fluid is now flowing through it. What is the velocity at the top
of the tube in relation to the velocity of the exiting fluid:
(a) The velocity is greater at the top
(b) The velocity is less (but not zero) at the top
(c) The velocity is zero at the top
(d) The velocity is the same at the bottom

i'm not sure about this question...would anyone be able to explain the answer to me

Nath
 
Physics news on Phys.org
No fluid is lost or created in the tube so the volume flowing in must equal the amount flowing out. If the size of the tube doesn't change what does this mean for the speed.

Unless this is a trick question - velocity is a vector it has magnitude and direction so walking north has a velocity of say 4mph north or -4mph south. I suspect that the word velocity was just misused in the question.
 
Therefore that makes the answer d then ?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Does Poiseuille's Law apply for vertical motion of fluids down a tube?
Replies
2
Views
2K
The Pressure Distribution in a Narrowing Tube with Increasing Fluid Velocity
Replies
10
Views
4K
How Does Air Pressure Affect Fluid Levels in a U-Shaped Tube?
Replies
5
Views
3K
How to determine air velocity in open ended tube?
Replies
9
Views
2K
Velocity of fluid in venturi tube
Replies
1
Views
2K
Askew Pitot tube, airplane velocity measurement
Replies
1
Views
2K
Does Fluid Dynamics Explain Pressure Gradients in a Frictionless Tube?
Replies
48
Views
5K
Picking up on the discussion "Air build-up in a siphon system"
Replies
6
Views
3K
How Does a Siphon Work with Different Liquid Heights and Pressures?
Replies
1
Views
3K
The location of the point with lowest kinetic energy
Replies
9
Views
2K

Hot Threads

Recent Insights

Back
Top