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Aluminium Block immersed in water beaker

  1. Oct 15, 2013 #1
    1. The problem statement, all variables and given/known data
    physical reasons for the relationship between weight change(100CC beaker with water and when you dip aluminum block in water ) and apparent loss in weight of the aluminium (Aluminium block weight using spring balance and when that block immersed in water)



    2. Relevant equations
    what is the physical reason for the relationship?
    As my lab suggest that both magnitudes are same.


    3. The attempt at a solution
    I think because they both work in gravity.. the relationship will be same.
     
  2. jcsd
  3. Oct 15, 2013 #2

    Simon Bridge

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    You have a system consisting of a block of metal and a tub of water.
    The weight of the system in air is the same when the block is outside the water as when it is submerged in the water - all else remaining equal.

    If you weigh the metal block by itself - it should appear lighter in water than out of water.

    Which situation did you do?

    For the situation - consider all the forces that could act on the system being studied.
    Hint: how does buoyancy work?
     
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