1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Hydrostatics and fluid mechanics

  1. Jan 18, 2009 #1
    1. The problem statement, all variables and given/known data

    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

    2. Relevant equations

    3. 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
  2. jcsd
  3. Jan 18, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Lorna18! Welcome to PF! :smile:
    You seem to have a surface tension force of 0.2 gm wt …

    how did you get that? :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook