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levitating PingPong ball

Blogs > evanthebouncy!
Post a Reply
evanthebouncy!
Profile Blog Joined June 2006
United States12796 Posts
September 28 2009 20:47 GMT
#1


This is pretty cool video, I've been doing it for awhile now but I really wanted an explanation why it worked and this video shows why.
It's a cool trick to pull off, I normally use the tube of a pen with ends unscrewed. I also have a water version where I direct the water from the faucet with a rubber pipe. It is mad fun but you get water all over the place.

Well try it out haha.

Life is run, it is dance, it is fast, passionate and BAM!, you dance and sing and booze while you can for now is the time and time is mine. Smile and laugh when still can for now is the time and soon you die!
EsX_Raptor
Profile Blog Joined February 2008
United States2801 Posts
September 28 2009 20:55 GMT
#2
i used to do this all the time with a blow dryer hahaha

i think the ball stays in its place because of the high speed winds that blow past it, same effect you feel when a car runs by you while you're stopped and you feel your car move towards it. the wind blows all around the ball creating a difference in pressure in the center of the blow dryer which keeps the ball in its place.

but i could be wrong ofc

my 2c
andiCR
Profile Blog Joined March 2008
Costa Rica2273 Posts
September 28 2009 21:12 GMT
#3
haha will do

would like to see the water version :O
Nightmare1795 wrote: I played a guy in bronze who said he was Japanese. That was the only game I ever dropped a nuke, which was purely coincidental.
micronesia
Profile Blog Joined July 2006
United States24673 Posts
September 28 2009 21:18 GMT
#4
evanthebouncy!, that explanation in the video was actually pretty good. In addition to the koanda effect, the magnus effect applies to the ping pong ball example. The air does not flow symmetrically around the ping pong ball. It 'chooses' a direction and flows around the ball with one general orientation. As a result, the ball does not sit perfectly in the center of the jet of air... it is actually off center.

I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...
ModeratorThere are animal crackers for people and there are people crackers for animals.
Klockan3
Profile Blog Joined July 2007
Sweden2866 Posts
September 28 2009 21:24 GMT
#5
On September 29 2009 06:18 micronesia wrote:
I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...

Did you know that it is the bernouli effect that causes the universe to accelerate its expansion? Since the stars are moving faster the further away they are, then the pressure must be lower according to the bernouli effect and thus we will have a net force in those directions creating the accelerating effect.
evanthebouncy!
Profile Blog Joined June 2006
United States12796 Posts
September 28 2009 22:00 GMT
#6
On September 29 2009 06:18 micronesia wrote:
evanthebouncy!, that explanation in the video was actually pretty good. In addition to the koanda effect, the magnus effect applies to the ping pong ball example. The air does not flow symmetrically around the ping pong ball. It 'chooses' a direction and flows around the ball with one general orientation. As a result, the ball does not sit perfectly in the center of the jet of air... it is actually off center.

I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...


huh I was gonna use Bernuli to explain lol, what's wrong with it >_>
Life is run, it is dance, it is fast, passionate and BAM!, you dance and sing and booze while you can for now is the time and time is mine. Smile and laugh when still can for now is the time and soon you die!
kekekekyle
Profile Blog Joined October 2007
Canada32 Posts
September 28 2009 22:02 GMT
#7
On September 29 2009 06:24 Klockan3 wrote:
Show nested quote +
On September 29 2009 06:18 micronesia wrote:
I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...

Did you know that it is the bernouli effect that causes the universe to accelerate its expansion? Since the stars are moving faster the further away they are, then the pressure must be lower according to the bernouli effect and thus we will have a net force in those directions creating the accelerating effect.


I don't quite understand this. Isn't Bernoulli's principle only valid for fluids? What does the velocity of stars have to do with anything? And isn't the pressure in space close to zero?
micronesia
Profile Blog Joined July 2006
United States24673 Posts
September 28 2009 22:28 GMT
#8
On September 29 2009 07:00 evanthebouncy! wrote:
Show nested quote +
On September 29 2009 06:18 micronesia wrote:
evanthebouncy!, that explanation in the video was actually pretty good. In addition to the koanda effect, the magnus effect applies to the ping pong ball example. The air does not flow symmetrically around the ping pong ball. It 'chooses' a direction and flows around the ball with one general orientation. As a result, the ball does not sit perfectly in the center of the jet of air... it is actually off center.

I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...


huh I was gonna use Bernuli to explain lol, what's wrong with it >_>

It is often used to explain things incorrectly. The Effect in and of itself is fine and valid, but it's easy to confuse how it can be applied to situations.
ModeratorThere are animal crackers for people and there are people crackers for animals.
Chill
Profile Blog Joined January 2005
Calgary25980 Posts
September 28 2009 22:39 GMT
#9
On September 29 2009 07:02 kekekekyle wrote:
Show nested quote +
On September 29 2009 06:24 Klockan3 wrote:
On September 29 2009 06:18 micronesia wrote:
I'm surprised they didn't fuck this up with attempts to use the bernouli effect to describe this...

Did you know that it is the bernouli effect that causes the universe to accelerate its expansion? Since the stars are moving faster the further away they are, then the pressure must be lower according to the bernouli effect and thus we will have a net force in those directions creating the accelerating effect.


I don't quite understand this. Isn't Bernoulli's principle only valid for fluids? What does the velocity of stars have to do with anything? And isn't the pressure in space close to zero?

Seriously. I don't understand this explanation at all. Since when is the universe pressurized?
Moderator
micronesia
Profile Blog Joined July 2006
United States24673 Posts
September 28 2009 22:40 GMT
#10
I think Klockan3 was just sympathizing with my complaints about how people use the Bernoulli Effect. Klockan3, has anyone ever actually fed you that explanation?
ModeratorThere are animal crackers for people and there are people crackers for animals.
GreEny K
Profile Joined February 2008
Germany7312 Posts
September 29 2009 01:31 GMT
#11
Fun trick, now i have to go try it ^^
Why would you ever choose failure, when success is an option.
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