Hello,One of my problems just state that the density of aluminum is 2.7 grams per cubic cmDoes that mean that you multiply LWH?!
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Perhaps there is more to the question than what you have givenTry reading it again to see what they are asking you to find Density is defined as mass divided by volumeDensity Mass / Volume or, DM/V _ Density is a material propertyIf you measure the density of an Aluminum door knob at your house, and I measure the density of an Aluminum cooking pot at my house, and an astronaut measures the density of his aluminum boots on the moon, then we all are going to get the same answer: 2.7 g/cm^3If you actually want to do this measurement, it is not hardYou need a piece of AluminumYou need to know its mass (weigh it!)And you need to know the amount of volume it takes up If it is a nice simple geometric shape, then, yes, you are exactly right: you can measure itLWH is exactly right for any squarish (cubical, rectangular, parallelogram) shaped chunks you might haveWhat if it were an Aluminum marble? You could still measure itIt would just be a matter of finding and using the correct mathematical formula for a sphere If it were a bizarre shape, like a small aluminum statue of the Greek philosopher Archimedes, say, then you could still find the volumeUse a measuring cupFill it partway with waterMeasure how much water is in the cupDrop the statue inThe water risesMeasure the total volume in the measuring cup nowThe difference between the before and after readings gives you the volume of the statueNow you would have enough information to calculate the density of the statueThis is a useful technique, say, if someone wanted to sell you a Gold statue of ArchimedesBy measuring the density of the statue you could tell if it was really solid gold or if it was just an aluminum or lead statue that had been painted with gold paint.
