Water passes along the hose of diameter 2.5 cm and out through nozzle of end diameter
Water passes along the hose of diameter 2.5 cm and out through nozzle of end diameter 1 cm at a rate of 2kg/s. Density of water is 1000Kgm-3 (a) Calculate volume flow rate (b) Find speeds of water as it passes through pipe and out of nozzle? (c) calculate rate of change of momentum of water along the nozzle
Comment on jcaron2's post
But the question doesn't state that the nozzle's volume is 0.002 m3
Comment on jcaron2's post
So you are saying that water takes 1 second to move along nozzle?
Comment on jcaron2's post
The fact that 2 Kg of water are being replaced every second doesn't mean that every second 2kg are having their momentum change from M*4.07ms-1 to M*25.5ms-1
Comment on jcaron2's post
So MY reputation gets negatively impacted because YOU don't get it? Thanks.
Comment on jcaron2's post
Sorry I didn't know it worked like that - but I cannot understand it if you have 2kg of water passing through nozzle per second it doesn't mean that it takes 1 second for momentum to change
Comment on jcaron2's post
I am starting to understand now - thanks for your patience I just didn't know that by saying no I would be harming your reputation
As I am understanding it if the nozzle has a volume of x this is being filled with water and water is getting removed from it at a time y. The volume doesn't count since it is the ratio of x on y which is always constant.
Comment on jcaron2's post
Yes, you've got it! I'm glad it's making a little more sense now. No problem about the "not helpful" rep. I didn't mean to sound so snarky about it.
Comment on jcaron2's post
By the way, I noticed the rep changed from a No to a Yes. Thanks, if you were the one that changed it. (I didn't know you could do that). Otherwise, if one of the admins changed it after seeing your reaction, thanks to them.
Either way, it's no big deal and perfectly understandable that you didn't know the implications of a "No".
I'm glad I was able to help. If you still have any more questions about it or need further clarification, don't hesitate to ask.