Velocity of water in water hose

In summary, the author assumes that the velocity inside the hose is close to 0, even though it is not explicitly stated in the question. This is based on their analysis of the problem and the fact that the hose is mainly closed, leaving only a thin jet. By applying the continuity equation, it can be determined that the velocity in the hose must be close to 0 if the jet outlet area is much smaller than the hose area.
  • #1
foo9008
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4

Homework Statement


in this problem , the author assume that velocity inside the hose is very low , near to 0 . but , it's not stated in the question , it's the anaylsis of the author . How do we know that the velocity of water in hose is close to 0 , if it is not mentioned earlier?

Homework Equations

The Attempt at a Solution

 

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  • #2
foo9008 said:
in this problem , the author assume that velocity inside the hose is very low , near to 0 . but , it's not stated in the question , it's the anaylsis of the author . How do we know that the velocity of water in hose is close to 0 , if it is not mentioned earlier?
Because the question implies it. Draw a diagram and it should show itself.
 
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  • #3
billy_joule said:
Because the question implies it. Draw a diagram and it should show itself.
i still don't understand , can you explain ?
 
  • #4
The question states the hose is mainly closed and only a thin jet remains. Apply the continuity equation, if the jet outlet area is much smaller than the hose area then velocity in the hose must be close to zero.
 
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1. What is the velocity of water in a water hose?

The velocity of water in a water hose can vary depending on factors such as the water pressure, hose diameter, and any obstacles or kinks in the hose. However, on average, the velocity is typically between 5-10 feet per second.

2. How does the velocity of water in a water hose affect its spray distance?

The velocity of water in a water hose directly affects its spray distance. The higher the velocity, the farther the water will travel. This is because the force of the water pushing through the hose creates a stronger stream that can travel a greater distance.

3. Can the velocity of water in a water hose be increased?

Yes, the velocity of water in a water hose can be increased by either increasing the water pressure or using a narrower hose. However, it is important to note that increasing the velocity too much can cause the hose to become unstable and potentially burst.

4. Why is the velocity of water in a water hose important to know?

Knowing the velocity of water in a water hose is important for various reasons. It can help determine the efficiency of the hose in delivering water to a specific location, the potential spray distance, and whether or not the water flow is sufficient for a certain task.

5. How can the velocity of water in a water hose be measured?

The velocity of water in a water hose can be measured using a flow meter or by timing how long it takes for a certain amount of water to flow through the hose. However, it is important to note that these methods may not be completely accurate due to factors such as friction and changes in water pressure.

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