Velocity of Liquid: Pressure & Density Factors

  • Thread starter Thread starter jonnyr
  • Start date Start date
  • Tags Tags
    Liquid Velocity
AI Thread Summary
To determine the velocity of a liquid with a density of 0.885 g/cm³ and a total pressure of 17236.89 kPa, the relevant formula is V² = 2P/D. The area of the nozzle is not required for this calculation, as the focus is on the relationship between pressure, density, and velocity. The nozzle in question has a diameter of 0.16 mm and consists of eight holes. Understanding these parameters allows for accurate calculations of liquid velocity under varying conditions.
jonnyr
Messages
2
Reaction score
0
I am trying to determine the velocity of a liquid. The density of the liquid is .885 g/cm3. The pressure at which it is being forced is 17236.89 kpa. What else do I need to know? I am looking for a formula to help me in other calculations with different pressures and densities. Thanks in advance for any help.
 
Physics news on Phys.org
I assume it is being forced out of a nozzle or hole at that pressure. (Is that the total pressure or pressure above atmospheric?) The main other detail you need is the area of the hole/nozzle, though there is a difference between the measured area and the 'effective' area. That difference can depend on the internal geometry of the container.
 
Yes it is being sprayed from a nozzle in this case which is .16mm per hole and a total of 8 holes. The pressure is total.
 
Correction, you don't need the area - was thinking of a different problem.
Pressure P, velocity V, density D, area A. Power = P.A.V = A.V.D.(V2/2), V2 = 2P/D.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Average velocity as a weighted mean'

Hello everyone, Consider the problem in which a car is told to travel at 30 km/h for L kilometers and then at 60 km/h for another L kilometers. Next, you are asked to determine the average speed. My question is: although we know that the average speed in this case is the harmonic mean of the two speeds, is it also possible to state that the average speed over this 2L-kilometer stretch can be obtained as a weighted average of the two speeds? Best regards, DaTario
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »

Similar threads

B Resnick Halliday Krane: Venturimeter formula mistake?
Replies
4
Views
986
How much liquid water do I need to get a relative humidity of 10%?
Replies
9
Views
2K
Pressure in Liquid: Why Height Doesn't Matter
Replies
5
Views
2K
Contradicting values of pressure for liquid cross-sections
Replies
17
Views
2K
Velocity of liquid from bottom pinhole of closed container
Replies
33
Views
5K
How does pressure act in all directions if gravity is downward only
Replies
4
Views
1K
How Does Pressure Affect the Boiling Point of Water?
Replies
2
Views
7K
A Pressure on a Capsule within an Enclosure (Underwater @ 500m)
Replies
5
Views
1K
Estimation and validation of water pressure at nozzle
Replies
3
Views
2K
How to Calculate Underwater Force for Displacement?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top