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patric44
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Homework Statement
a Basin contains water , a beaker is put upside down to a depth of 3m inside it , if the volume of the beaker
is 250 cm^3 . and its C.S area = 200 cm2 calculate the length of the water column which rises inside the baker , supposed that their is no air leakage from the beaker ?
Homework Equations
the formula of bolye's law : P1V1 = P2V2
The Attempt at a Solution
when i tried to solve it i used that approch :
its in the attachment .( which turns to be more complex that the solution manual )
the solution manual shows that the answer is 0.28 cm the same solution the i got . put the book didn't use
the same approch it states that : the air pressure inside the beaker after being put inside the water
Pg = Pa + ρgh (so his solution becomes significanly easier ) , he didn't take into his account the pressure due to the rising water as i did :
Pg + ρg(Lw ) = Pa + ρgh →→ Pg = Pa + ρgh - ρg(Lw ) .
so my question is : is the solution manual right ? or he had to take into his account the pressure of the rising water ? because i feel that its some how less accurate !
Attachments
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