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    Archimedes floating object relating these two expressions?

    I saw someone solve this problem using: ? g v = mg for the problem: a barge with vertical sides 6 m wide and 10 m long is floating.how much deeper does it sink with 15,000 kg of coal added to it. I've never seen the equation they used, the equation my teacher gave is ?obj V obj = ? fl Vfl...
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    Does any cell phone company allow the use of a smartphone (like blackberry or HTC...

    ...ozone) without a data plan? Or do they all require it?? Thanks! Also, if It is possible, will the phone mess up as far as getting a signal goes?? Thanks !!!
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    Hot flashes related to allergies?

    when I walk a lot outside or go into the grocery store I get intense hot flash things and my eyes get dry or just feel bigger or something. This even happens when I'm just sitting around, not even moving.I dont know what this is but it makes it hard to walk, I get really tired because of feeling...
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