# A level physics mechanics

#1
Stuck on how to calculate area of the pipe
Last edited by Heixi; 1 month ago
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1 month ago
#2
You have the volume flowing into the turbine per second. Volume per second is area times velocity. You know the maximum possible speed of the water as it arrives to the turbine. Volume needs to be conserved (if you assume incompressibility of the fluid, which applies well for water/is assumed.)
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1 month ago
#3
i remember doing this question but can remember where from could you let me know what paper its from?
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1 month ago
#4
(Original post by JinTech)
Attachment 1052665Rate of flow per second divided by the cross sectional area of the intake pipe = v (which you worked out in the previous)
then just re-arrange for the radius.
It's against the guidelines to provide an explicit numerical solution/do someone elses work for them.
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1 month ago
#5
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#6
It’s from a specimen paper
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#7
(Original post by Callicious)
It's against the guidelines to provide an explicit numerical solution/do someone elses work for them.
It’s not homework though ? The markscheme wasn’t clear on how the area was worked out so I was just wondering about that
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1 month ago
#8
(Original post by Heixi)
It’s not homework though ? The markscheme wasn’t clear on how the area was worked out so I was just wondering about that
In general you're not recommended to provide worked solutions and the like- that's just doing the work for someone. Providing guidance and/or helping someone with their solution is the way to go.
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