Hydrostatics and fluid mechanics

[Lorna18]

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

 

[tiny-tim]

Welcome to PF!

Hi Lorna18! Welcome to PF!

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?