A mass of an apple
Question:

Shlomi is an agricultural researcher in an experimental farm in Malkiya. He is developing a new species of apple, and he mannaged to grow an extraordinary apple. For his research, Shlomi needed to measure the apple`s mass. Unfortunately, a gready worm ate her way through the apple and made holes in it.

How can Shlomi calculate the original mass of the apple, before the worm made holes in it?

0 People tried to answer this question

Shlomi can fill the wormholes with hot paraffine, and let it solidify. Then he can measure the mass of the apple, with the holes filled.

Shlomi must first weigh the apple. Then he must measure the originalvolumeof the apple. He does it by closingthe wormholes closed by tape, and measuring the volume of water rejected by the apple. Then he can calculate the density of the apple by dividing the mass by the volume.

After Shlomi discovered the density, he must measure the volumeof the apple with the wormholes open. He will then be able to calculate the original mass (before the worm ate it), by multiplying the density by thisvolume.

Shlomi must first measure the originalvolume of the apple. He does itby closing the wormholes with tape, and mesuring the volume of the water regected by the apple.

Then he mustcalculate the density of the apple by measuring the mass of a 1 cm3 piece.

Then he must multiply the density and the volume, and he will discover the original mass of the apple.

Shlomi must firstcalculate the density of the apple by measuring the mass of a 1 cm3 piece.

Then he must measure the volume of what is left of the apple.

Then he must multiply the density and the volume, and he will discover the exact mass of the apple.



Comments:
1.  Goldik Rivka (2007-12-20 15:00:00)
Density
I think that is a very clever question. I think  yo have to give more information regarding density and mass as in the following animation from Phet

<iframe src="http://phet.colorado.edu/sims/density-and-buoyancy/density_en.html" width="800" height="600" scrolling="no" allowfullscreen></iframe>

https://phet.colorado.edu/en/simulation/legacy/density

2.  Goldik Rivka (2007-12-20 15:00:00)
another point on your qustion
I add the Manara Kibbutz as another point in your map along a short movie of a worm eating an apple. (the least disgusting one I found)
3.  Baburin Lera (2007-12-20 15:00:00)
Thank you Rivka!
Your comments are very helpful!
4.  asbe riwaa (2013-12-20 15:00:00)
very intresting question
the question is very interesting 
i dont have any comment about the text 
i think that you have to make name of your point at the map and to write more about it
and another thing is the arrangment of the answers 
5.  Baburin Lera (2014-12-20 15:00:00)
Dear riwaa,
Thank you for the comment. I didn`t understand what you meant by aragment of the answers, could you explain? 


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