Hydrostatics and fluid mechanics

Lorna18
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Homework Statement



A glass cube of length 2cm and specific gravity=3 is kept suspended via a spring balance and is kept exactly half immersed in water. surface tension of water is 75 dynes/cm. find the reading shown by the spring balance. (contact angle = 0 degree. g=1000cm/sec^2)
i got 23.8 gm wt but the answer seems to be wrong


Homework Equations





The Attempt at a Solution


vol of glass cube = 8cm^3
vol of the part immersed is 4m^3weight of water displaced = 4*1gm wt
 
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Welcome to PF!

Hi Lorna18! Welcome to PF! :smile:
Lorna18 said:
A glass cube of length 2cm and specific gravity=3 is kept suspended via a spring balance and is kept exactly half immersed in water. surface tension of water is 75 dynes/cm. find the reading shown by the spring balance. (contact angle = 0 degree. g=1000cm/sec^2)
i got 23.8 gm wt but the answer seems to be wrong

You seem to have a surface tension force of 0.2 gm wt …

how did you get that? :smile:
 
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