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Homework Help: [Physical Science] Finding Density, Mass, or Volume

  1. Mar 6, 2005 #1
    Could someone work this problem for me and explain what they did? It's the only one on the worksheet I don't understand...

    "b. A truckload of 2-liter soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What is the mass of the plastic shreds inside one of the drums?"

    I know that the first number in the problem is going to be 55,000 cm^3, because 55 liters = 55,000 milliliters, which is the equivalent of cm^3. I just don't know what the second number would be.

    Thanks in advance for the help!
  2. jcsd
  3. Mar 6, 2005 #2


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    What's the density of plastic...?55liters=55000cm^{3},not milliliters...

  4. Mar 6, 2005 #3


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    In order to do that, you have to know the density of the plastic. Isn't that given in the problem? Different kinds of plastics have different densities.
  5. Mar 6, 2005 #4
    That's basically what I said in my post, yes... ;) I didn't plan on writing out the problem with milliliters. Thank you for pointing that out in case I didn't realize it, though! Usually I'm the first to make simple mistakes like that.

    But yes, I'm sorry! I believe it's referring to the answer to A, which is 0.96 g/cm^3.
    Last edited: Mar 6, 2005
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