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Homework Help: Its really confusing me alot

  1. Sep 8, 2005 #1
    a block of iron defined by parameters mass,volume and density.when volume is doubled,the mass is also doubled;but the density of doubled volume of iron block remains the same.how do you distinguish the parameters mass and density.give any example (may be 2 or 3),so that i can understand well
    thank u for taking ur valuable time.
     
  2. jcsd
  3. Sep 8, 2005 #2
  4. Sep 8, 2005 #3

    arildno

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    The density is the RATIO between mass and volume, [tex]\rho_{1}=\frac{m_{1}}{V_{1}}[/tex]
    where [tex]\rho_{1}[/tex] stands for density for the first block, [tex]m_{1},V_{1}[/tex] mass and volume for block 1 respectively.
    If we look at a block 2 with twice the mass of block 1, that is [tex]m_{2}= 2m_{1}[/tex], and doubled volume [tex]V_{2}=2V_{1}[/tex], the density of this block is:
    [tex]\rho_{2}=\frac{m_{2}}{V_{2}}=\frac{2m_{1}}{2V_{1}}=\frac{m_{1}}{V_{1}}=\rho_{1}[/tex]
    that is, the densities of the blocks are equal.
     
  5. Sep 9, 2005 #4
    iam speaking statistically

    as per STATISTICAL MECHANICS APPLY UR idea and can u eloborate the physical situation.
    thank u
     
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