Derek G.
asked • 09/19/19Having problem with formula
If you drive 30 miles at 25 mpg, how much energy is used in joules?
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1 Expert Answer
Hi Derek,
If you drive 30 mi in a car the 25 mi/gal fuel economy the you would use 30/25=1.2 gallons of gas.
1Gal gas contains1.3 x 108 j ( look this up on google) of energy and we used 1.2 gal so we used 1.56 x 108 J.
Jim
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Mark H.
You can easily calculate the number of gallons of gas used, but what value will you use for the energy content of the gas?09/19/19