- #1

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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