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Archimedis Principal

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1212617.  Mon Nov 21, 2016 4:30 pm Reply with quote

In the second book of general ignorance on page 66 its headed "Whats the best way to weigh your own head".

It mentions Archimedis and how he discovered the volume of irregular objects by seeing how much water they displaced.

The volume displaced is equal to the weight of the object, but only if allowed to float unaided in the water, if you immerse your head, it will only displace the volume of the head, not the weight, it will only weigh the head if it alone was placed in the water and allowed to float, or sink as the case may be.

Consider a ping pong ball placed in a bowl of water will float and displace a small amount of water. If you held it under the water forceable it would displace the volume of the ping ball, and give a false displacement based on the volume.

1212627.  Mon Nov 21, 2016 5:19 pm Reply with quote

Hi Vipers. I had the same thought - that it was a flawed exercise.

1212633.  Mon Nov 21, 2016 5:31 pm Reply with quote

Thanks for that, nevertheless a very interesting publication.

1212635.  Mon Nov 21, 2016 5:36 pm Reply with quote

Haven't read it. I am a lapsed member of the QI Coven.

1212649.  Mon Nov 21, 2016 6:04 pm Reply with quote

I'm still not sure why you can't just lay on your back with your head on a set of bathroom scales. Take a selfie while doing it to see the result.

If this becomes a new Facebook trend, I demand recognition as it's inventor!!!!!


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