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Pressure Problem

  1. Nov 6, 2007 #1
    A small quanitity of water is poured into a can, the water is brought to a boil. Then the can is sealed with a rubber stopper. As you watch, the can is slowly crushed with sounds of metal bending. Assuming the dimensions of the can are 0.24m x 0.16m x 0.10m and the inside of the can is in a perfect vacuum, what is the total force exerted on the can by the air pressure?

    Now I don't just need the answer i need to know how to solve it. Thanks in advance !
     
    Last edited: Nov 6, 2007
  2. jcsd
  3. Nov 6, 2007 #2

    learningphysics

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    what is the pressure outside the can? what is the surface area of the can. I assume the can is a cube given the dimensions...

    what is the relationship between force, pressure and area?
     
  4. Nov 6, 2007 #3
    That's all the question gives me. I'm guessing 1 atm pressure and the area is .00384 m from the given dimesions? I'm not completely sure
     
  5. Nov 6, 2007 #4

    learningphysics

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    you calculated the volume of the cube... you need the surface area. so the sum of the areas of the 6 sides. convert 1 atm to pascals...
     
    Last edited: Nov 6, 2007
  6. Nov 7, 2007 #5
    I still dont know how to do this problem can some1 give me formulas?
     
  7. Nov 7, 2007 #6

    learningphysics

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    length = 0.24m
    width = 0.16m
    height = 0.10m

    can you find the area of the 6 sides of the cube?

    side 1 and 2... length*width
    side 3 and 4... width*height etc...
     
    Last edited: Nov 7, 2007
  8. Nov 7, 2007 #7
  9. Nov 7, 2007 #8

    learningphysics

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    exactly. And what's the pressure outside the can in Pa?
     
  10. Nov 8, 2007 #9
    1.01 KPa so you just multiply them together correct?
     
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