A barrel holds 750 pounds of gasoline. The same barrel holds 1100 pounds of water when full. What is the density of gasoline? [Hint : when volume is constant, d ~ m]
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Expert's answer
2012-09-18T10:55:10-0400
When the volume is constant, density is proportional to mass: d ~ m. Set up a proportion:
750 pounds of gasoline - x 1100 pounds of water - 1 g/cm^3
Then from the proportion we can get the unknown value x: x = (750 * 1) / 1100 = 0.6818 g/cm^3 Thus, the density of gasoline is 0.6818 gram per cubic centimeter.
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