17 November 2007

NaBloPoMo 17

Tonight we had some friends over for a bit of a pot luck dinner (we made the ribs lol) and I'd also bought some lemons and limes to make some nice refreshing water. I sliced the fruit, made some ice and then in went the water. I was quite surprised to see that the limes didn't float! I'd never noticed this before and just had to google a bit:

Stevespanglerscience.com says:
Scientists seem to be infatuated with objects that float and sink. Even non-scientists find great joy in dropping stuff in water to see if it floats or sinks. Fans of David Letterman are quick to point out one of Dave's favorite segments called "Will It Float?" Here's the latest float or sink challenge: Why do lemons float in water but limes sink? .....

......our next step was to weigh the lemon and the lime. Digging through our grocery bag of lemons and limes, we found two that were very similar in size and weight. Both the lemon and the lime weighed exactly 101 grams. If you know the weight, it only makes sense to determine the volume of each fruit. Using displacement of water, we determined that that the lemon had a volume of 99 mL and the lime had a volume of 90 mL.....

....our next step was to weigh the lemon and the lime. Digging through our grocery bag of lemons and limes, we found two that were very similar in size and weight. Both the lemon and the lime weighed exactly 101 grams. If you know the weight, it only makes sense to determine the volume of each fruit. Using displacement of water, we determined that that the lemon had a volume of 99 mL and the lime had a volume of 90 mL. ...

...Since the density of the lemon and lime are very close to water, even very small changes in composition could mean the difference between sinking and floating.


All rather interesting eh?

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