Another Water Experiment

Pretty cool :)

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-16 1. kozy commented 14 years ago

this can't be serious :(
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+2 2. SilverPT commented 14 years ago

I need someone to explain this lol
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+14 3. Salem commented 14 years ago

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-2 4. Voutelamberopipi commented 14 years ago

disclaimer: only try this with bowls of water
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+3 5. kainim commented 14 years ago

pepper floats because of the surface tension (same way water striders can walk on water)
soap breaks the surface tension so the pepper sinks (if there were water striders in the bowl, they would drown too)
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0 6. Crash0 commented 14 years ago

#1 and #2, didn't you learn anything in school?
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-1 7. shayangx commented 14 years ago

Ok going to do that right now..!
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+6 8. dvh commented 14 years ago

Don't try this at home!
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+4 9. CrackrJak commented 14 years ago

It all has to do with Surface Tension.

Soap makes water 'Wetter', Allows it to break up into much smaller particles. This is way soapy water gets your clothes clean, It allows the water to soak through instead of beading up.

The pepper is floating on the outside 'skin' of the water, Initially, The soap destroys that 'skin' and then because the top of the surface of the water is curved the pepper slides down the sides till it reaches the rim of the bowl.

This is not magnetic or electric repulsion.
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+1 10. Maffis commented 14 years ago

do not try this at home. it's very dangerous and might explode.
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+19 11. TheProfessor commented 14 years ago

Thank you for those words of caution from Maffis. Experiments such as this ought to be perfectly safe, but please remember to follow the instructions precisely. Any deviation might prove disasterous.

Do NOT use petrol instead of water!
Do NOT sprinkle on granules of gunpowder instead of pepper!
Do NOT insert a lighted match intead of your finger!

Remember. Safety first!
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0 12. JamMan commented 14 years ago

Just tried this and it didn't work cos the bits of pepper were too big :( Need really fine pepper for success!
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+2 13. shayangx commented 14 years ago

I tried it and it works!
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-4 14. spetzialist commented 14 years ago

Seriously this is soooooooooo old..
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-1 15. Usdevildoggmc commented 14 years ago

#3 explains it pretty well but I think it could of been explained with half the text =D
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+1 16. BMX_Tavi commented 14 years ago

#6 maybe they are americans :))))))
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+1 17. erg5hp commented 14 years ago

that happens when I walk into a room full of people . . .
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+1 18. Noobeater commented 14 years ago

Used to do this with ants when I was a kid. Sorry ants.
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0 19. nooitaf (admin) commented 14 years ago

#12 It doesn't have to be pepper. Any dark fine powder would do it.
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0 20. eNdEmiOn06463 commented 14 years ago

There are tons of little experiments you can do with surface tension. Just look 'em up. I like the one with the little boat being propelled by a drop of soap.
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0 21. kutless429 commented 14 years ago

I don't know what that is, thus I rather not stick my finger in it...
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-1 22. kainim commented 14 years ago

#15, mine was the shortest :D
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0 23. m3a9m commented 14 years ago

You must had been bored much that u started fingering the water >:)
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0 24. NathaneM commented 14 years ago

it is very common scheme used by dish washing liquid products. >:)