Velocity of water in water hose

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Homework Help Overview

The discussion revolves around the velocity of water in a hose, particularly focusing on an assumption made by the author regarding the velocity being close to zero. Participants are examining the implications of this assumption and the context provided in the problem statement.

Discussion Character

  • Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants question the basis for the assumption that the velocity is near zero, noting that it is not explicitly stated in the problem. Some suggest that a diagram might clarify the situation, while others reference the continuity equation to support the assumption based on the hose's configuration.

Discussion Status

The discussion is ongoing, with participants exploring different interpretations of the problem. Some guidance has been offered regarding the application of the continuity equation, but there is still a request for further explanation and clarity on the assumptions made.

Contextual Notes

There is a noted lack of explicit information in the problem statement regarding the velocity of water in the hose, leading to varying interpretations among participants.

foo9008
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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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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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billy_joule said:
Because the question implies it. Draw a diagram and it should show itself.
i still don't understand , can you explain ?
 
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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