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Homework Help: Volume based on depth

  1. Apr 30, 2010 #1
    An air bubble has a volume of 1.75 cm3 when it is released by a submarine 125 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume that the temperature of the air in the bubble remains constant during ascent.

    P= a+h*g*density

    a=101325Pa
    h=125m
    g=9.8
    density of freshwater=1000kg/m^3

    P1*V1=P2*V2
    1326325Pa*1.75cm3=101325*V2

    V2=22.90cm3?

    when calculate the initial pressure i get 1326325Pa so that would be the pressure under the water and the pressure above the water would just be 101325Pa?

    Am i doing this right?
     
  2. jcsd
  3. May 1, 2010 #2

    kuruman

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    Looks right to me.
     
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