Magic trick?
Air plus 'something' equals magic?
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9
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2. jesus commented 16 years ago
I do this when I'm bored.
Jesus out.
Jesus out.
9
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3. jesus commented 16 years ago
I do this when I'm bored.
Jesus out.
Jesus out.
23
5. NucleoVega commented 16 years ago
there's probably air blowing upwards from below where we can't see.
5
7. jej_knowles commented 16 years ago
use your brains you numpties! the air flowing over the top of the roll creates a vacum below the roll in the same way that an aeroplane wing does and creates uplift! so much so that the air flow holds the roll in the air! THE END !
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9. itsSimple7 commented 16 years ago
Basic physics, bernoulli principal, air moving over a wing at a higher pressure than the air under the wing causes lift, (suction upwards), and is the basic principal of flight. A similar class room experiment is done with a vacuum cleaner and an egg.
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10. jej_knowles commented 16 years ago
nothing to do with vacuum's?
Hold a playing card infront of your mouth directly in front of a burning candle! when you blow you will find that the flame will be sucked towards the back of the card due to the created suction! what is sucction? read it and weep!
Suction is the flow of a fluid into a partial vacuum, or region of low pressure. The pressure gradient between this region and the ambient pressure will propel matter toward the low pressure area. Suction is popularly thought of as an attractive effect, which is incorrect since vacuums do not innately attract matter. Dust being "sucked" into a vacuum cleaner is actually being pushed in by the higher pressure air on the outside of the cleaner.
Hold a playing card infront of your mouth directly in front of a burning candle! when you blow you will find that the flame will be sucked towards the back of the card due to the created suction! what is sucction? read it and weep!
Suction is the flow of a fluid into a partial vacuum, or region of low pressure. The pressure gradient between this region and the ambient pressure will propel matter toward the low pressure area. Suction is popularly thought of as an attractive effect, which is incorrect since vacuums do not innately attract matter. Dust being "sucked" into a vacuum cleaner is actually being pushed in by the higher pressure air on the outside of the cleaner.
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11. BombDiggady commented 16 years ago
Obviously explained.
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12. f2ip commented 16 years ago
jej, you almost have it right...
"The speed of a moving fluid has an effect on the pressure exerted by the fluid. Bernoulli's Principal is the concept that as the speed of a moving fluid (liquid or gas) increases, the pressure within that fluid decreases. The principle states that the total energy in a steadily flowing fluid system is a constant along the flow path. An increase in the fluids speed must be matched by a decrease in it's pressure."
taken from http://www.k12.nf.ca/gc/scienceweb/physicsweb/Physics3204/studentprojs/Project04/Principal.htm
"The speed of a moving fluid has an effect on the pressure exerted by the fluid. Bernoulli's Principal is the concept that as the speed of a moving fluid (liquid or gas) increases, the pressure within that fluid decreases. The principle states that the total energy in a steadily flowing fluid system is a constant along the flow path. An increase in the fluids speed must be matched by a decrease in it's pressure."
taken from http://www.k12.nf.ca/gc/scienceweb/physicsweb/Physics3204/studentprojs/Project04/Principal.htm
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15. duck_dodgers commented 16 years ago
wtf???
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21. shavedfish commented 16 years ago
#9 i did an experiment with a vacuum cleaner and an egg once
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25. Hellion1982 commented 13 years ago
Heck, I was ready to rate it down when it started. Couldn't wait to rate it up when it ended.
-1 1. wdwakwwa1 commented 16 years ago