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Mathematics 7 Online
OpenStudy (anonymous):

The heat H in watts generated by an electric heating element varies directly as the square of the current i in amperes. A heating element produces thermal energy at a rate of 648 watts when the current is 0.9 amperes. What rate of heating in watts will be generated by a current of 1.4 amperes?

OpenStudy (anonymous):

\[H=ki ^{2}\] substitute H = 648 and i = 0.9. find k use i and k to find H for i=1.4A

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