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    Is 2+2 considered a mathematic expression?

    I was talking to my friend earlier today, and he was being stupid I don't remember what we were talking about, but he had said "2+2 is 4" I don't know what is wrong with me, but I had noticed that he didn't say "equals 4" so I blurted out, "2+2 is not 4, because without an equal sign, it is...
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    does the playstation 3 use the blu ray lense to play games?

    or does it use another lense to read video games? What if the blu ray part is broken, can I still play video games?
  3. S

    How do you solve for this physics question involving a kid swinging?

    Help with Physics question involving swinging? (formulas used)? A child of mass 26 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and the speed is 12 m/s. At this instant the cord is 3.40 m long. What is the magnitude of the force that...
  4. S

    Help with Physics question involving swinging? (formulas used)?

    A child of mass 26 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and the speed is 12 m/s. At this instant the cord is 3.40 m long. What is the magnitude of the force that the elastic cord exerts on the child? The relaxed length of the...
  5. S

    Physics swinging problem?

    A child of mass 26 kg swings at the end of an elastic cord. At the bottom of the swing, the child's velocity is horizontal, and the speed is 12 m/s. At this instant the cord is 3.40 m long. What is the magnitude of the force that the elastic cord exerts on the child? The relaxed length of the...
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