Algebra

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The power in an electric circuit varies inversely with the resistance. If the power is 1200 watts when the resistance is 12 Ohms, find the power when the resistance is 6 Ohms.

  • Algebra -

    A taxi company charges riders a fixed charge of $2.30 plus $1.20 per mile. How many miles must a rider go to have an average cost per mile of $1.30?

  • Algebra (Anon.) -

    First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.

    Let n= # miles

    2.30 + 1.20n = 1.30n

  • Physics Ashley needs help -

    Indicate your subject in the "School Subject" box, so those with expertise in the area will respond to the question.

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  • Algebra actually :) -

    p = k/R
    1200 = k/12
    k = 14400
    so
    p = 14400/6
    p = 2400 Watts

  • Algebra Anon -

    c = 1.2 m + 2.3
    c/m = 1.2 + 2.3/m = 1.3
    2.3/m = 0.1
    m = 23 miles

  • Algebra -

    when P=1200W , R=12Ù
    the current is I^2=P/R=100 , I=10A
    So the power P=? R=6Ù I=10A
    P=I^2R= 100*6=600W

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