Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Foo Off-Topic chit chat with no general subject.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 02-04-09, 12:08 AM   #1
RubenX 
Look! My Spine!
Thread Starter
 
RubenX's Avatar
 
Join Date: Apr 2008
Location: Kissimmee, FL
Bikes:
Posts: 619
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Foo MythBusting Thread

This is simple, if you know of a myth that could possibly get busted, post it here and suggest some kind of test. If some other Fooster can test it, please do and post the results here. I'll start:

Antigravity fields & Magnets

The myth says that you can create a simple contraption that will create some kind of antigravity field, canceling some of the earth's gravity forces on it. To make the contraption:

1) Get 2 big speaker magnets.
2) Get a screw and some washers and nuts.
3) Use the screw, washers and nuts to force the 2 magnets together, with the repelling poles facing each other (the 2 south or the 2 north).

Now go to a high place and let it fall. Science says that every object falls at the same rate regardless of weight, with an acceleration of 9.8ms^2. The myth says that this antigravity contraption will fall at a measurable slower rate.

Anybody wanna test this? Any other myth you want some other Fooster to test?
RubenX is offline   Reply With Quote
Old 02-04-09, 12:20 AM   #2
cal_gundert05
My name is Mike, not Cal
 
Join Date: Jul 2006
Bikes:
Posts: 474
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ha, cool. I don't have a myth to bust, but I just want to say how creepy the Google ads in the OP are--all nuts and screws and stuff. I know I'm a bit late, but I stopped visiting BF shortly after the ads appeared and just came back.
cal_gundert05 is offline   Reply With Quote
Old 02-04-09, 12:23 AM   #3
Tex_Arcana
Lone Star
 
Tex_Arcana's Avatar
 
Join Date: Feb 2008
Location: Houston, Tx.
Bikes:
Posts: 561
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What about using those rare earth magnets advertised next to your post?
Tex_Arcana is offline   Reply With Quote
Old 02-04-09, 12:27 AM   #4
UnsafeAlpine
Domestic Domestique
 
UnsafeAlpine's Avatar
 
Join Date: Dec 2007
Location: Michigan
Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso
Posts: 1,742
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't believe it. I have, however, made an "anti-gravity" machine.

You'll need:

a copper pipe and a pvc pipe both of the same diameter roughly 6 feet long.
two magnets that fit into the pipes.

Copper is great for this, but you should be able to do it with aluminum or some other non-ferrous material.

What you do:

Drop both magnets down the tubes at the same time. Every time you do it, the magnet in the copper pipe will come out slower than the pvc pipe.

Why does this happen:

Copper is non-ferrous meaning it is non-magnetic. The magnet is not slowed by some sort of attraction between the copper and the magnet, so what makes it work?
UnsafeAlpine is offline   Reply With Quote
Old 02-04-09, 12:33 AM   #5
KrisPistofferson
Immoderator
 
KrisPistofferson's Avatar
 
Join Date: Oct 2004
Location: POS Tennessee
Bikes: Gary Fisher Simple City 8, Litespeed Obed
Posts: 7,630
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Armor All on the rims makes caliper brakes quit sqeaking.
__________________
Quote:
Originally Posted by Bikeforums
Your rights end where another poster's feelings begin.
KrisPistofferson is offline   Reply With Quote
Old 02-04-09, 12:37 AM   #6
RubenX 
Look! My Spine!
Thread Starter
 
RubenX's Avatar
 
Join Date: Apr 2008
Location: Kissimmee, FL
Bikes:
Posts: 619
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Children weight more when sleeping.
RubenX is offline   Reply With Quote
Old 02-04-09, 12:40 AM   #7
Michigander
Senior Member
 
Michigander's Avatar
 
Join Date: May 2005
Bikes: Giant ATX 1200, Schwinn Peleton
Posts: 1,724
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 54 Post(s)
You can plug a bunch of wound up wire into the wall and it will lift off the ground, but heat up very quickly. That's the simplest, but most dangerous method. Youtube has a lot of instructional videos to make safer versions.
__________________
Bring back the Sig Test!


(\__/)
(='.'=)
(")_(")
Michigander is offline   Reply With Quote
Old 02-04-09, 01:19 AM   #8
Buglady
Senior Member
 
Buglady's Avatar
 
Join Date: Apr 2007
Location: Calgary
Bikes: 2013 MEC Col Ltd. road bike; 2012 MEC Silhouette hybrid; 2001 Specialized Allez (too small); 1984 Raleigh 5-speed city bike; 1985 Boyes-Rosser tourer; 1976 Raleigh Twenty folding bike; 1988 (?) Kuwahara "Blaze" mountain bike
Posts: 2,303
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by RubenX View Post
Children weight more when sleeping.
So do cats. It's the damndest thing.
Buglady is offline   Reply With Quote
Old 02-04-09, 01:40 AM   #9
SingingSabre 
BF's Level 12 Wizard
 
SingingSabre's Avatar
 
Join Date: Feb 2006
Location: Tucson, AZ
Bikes: Diamondback Sorrento turned Xtracycle commuter
Posts: 1,425
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by KrisPistofferson View Post
Armor All on the rims makes caliper brakes quit sqeaking.
__________________
Shameless plug (my sites):
Work
Photography
Vanity
Quote:
Originally Posted by Bklyn
Obviously, the guy's like a 12th level white wizard or something. His mere presence is a danger to mortals.
SingingSabre is offline   Reply With Quote
Old 02-04-09, 01:53 AM   #10
mlts22 
Senior Member
 
Join Date: Aug 2006
Bikes:
Posts: 998
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
5 foot high spoilers on Civics make them go faster. Even when the engine isn't running.
mlts22 is offline   Reply With Quote
Old 02-04-09, 04:27 AM   #11
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
pcad goes faster on a cervelo
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 02-04-09, 05:08 AM   #12
ehidle
T-Shirt Guy
 
ehidle's Avatar
 
Join Date: Jul 2008
Location: Lansdale, PA
Bikes: 2005 Fuji Team Issue, 2007 Fuji SL-1
Posts: 464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by KrisPistofferson View Post
Armor All on the rims makes caliper brakes quit working.
De-Mythed it for you...
__________________
Yellow + Blue Jerseys!

Get your Cranky T-Shirt!
Men's
and Women's designs available
ehidle is offline   Reply With Quote
Old 02-04-09, 05:11 AM   #13
ehidle
T-Shirt Guy
 
ehidle's Avatar
 
Join Date: Jul 2008
Location: Lansdale, PA
Bikes: 2005 Fuji Team Issue, 2007 Fuji SL-1
Posts: 464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Myth: Wearing a Team Discovery kit and riding a Tre..... oh nevermind...
__________________
Yellow + Blue Jerseys!

Get your Cranky T-Shirt!
Men's
and Women's designs available
ehidle is offline   Reply With Quote
Old 02-04-09, 05:15 AM   #14
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't know about you, but my trek team discovery jersey was $20. and I ride cannondale and rossin.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 02-04-09, 11:08 AM   #15
DannoXYZ 
Senior Member
 
DannoXYZ's Avatar
 
Join Date: Jul 2005
Location: Saratoga, CA
Bikes:
Posts: 11,600
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by UnsafeAlpine View Post
Why does this happen:

Copper is non-ferrous meaning it is non-magnetic. The magnet is not slowed by some sort of attraction between the copper and the magnet, so what makes it work?
A moving magnetic field (falling magnet) will induce an electric current at right-angles to its direction of travel. In this case, around the circumference of the pipe. The moving electric current will then generate a magnetic-field at right-angles to ITS direction of travel. This mag-field will oppose the original mag-field of the falling magnet and resist its movement. However, since we don't have 100% efficient conversion of magnetism-to-electricity-to-magnetism, the generated opposing field is less than the original, thus only slowing the magnet's travel.

In a superconducting scenario, you CAN levitate the magnet...
DannoXYZ is offline   Reply With Quote
Old 02-04-09, 11:10 AM   #16
UnsafeAlpine
Domestic Domestique
 
UnsafeAlpine's Avatar
 
Join Date: Dec 2007
Location: Michigan
Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso
Posts: 1,742
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by DannoXYZ View Post
A moving magnetic field (falling magnet) will induce an electric current at right-angles to its direction of travel. In this case, across the circumference of the pipe. A moving electric current will generate a magnetic-field at right-angles to ITS direction of travel. This mag-field will oppose the original mag-field of the falling magnet and resist its movement. However, since we don't have 100% efficient conversion of magnetism-to-electricity-to-magnetism, the generated opposing field is less than the original, thus only slowing the magnet's travel.

In a superconducting scenario, you CAN levitate the magnet...
Commonly known as eddy currents.
UnsafeAlpine is offline   Reply With Quote
Old 02-04-09, 11:17 AM   #17
jsharr
You Know!? For Kids!
 
jsharr's Avatar
 
Join Date: Apr 2005
Location: Just NW of Richardson Bike Mart
Bikes: '05 Trek 1200 / '90 Trek 8000 / '? Falcon Europa
Posts: 6,157
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Chloroform decreases libido

I have been running field tests for a few years now. I guess I need to pull my notes and see.
__________________
Are you a registered member? Why not? Click here to register. It's free and only takes 27 seconds! Help out the forums, abide by our community guidelines.
Quote:
Originally Posted by colorider View Post
Phobias are for irrational fears. Fear of junk ripping badgers is perfectly rational. Those things are nasty.
jsharr is offline   Reply With Quote
Old 02-04-09, 11:20 AM   #18
ehidle
T-Shirt Guy
 
ehidle's Avatar
 
Join Date: Jul 2008
Location: Lansdale, PA
Bikes: 2005 Fuji Team Issue, 2007 Fuji SL-1
Posts: 464
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by DannoXYZ View Post
A moving magnetic field (falling magnet) will induce an electric current at right-angles to its direction of travel. In this case, around the circumference of the pipe. The moving electric current will then generate a magnetic-field at right-angles to ITS direction of travel. This mag-field will oppose the original mag-field of the falling magnet and resist its movement. However, since we don't have 100% efficient conversion of magnetism-to-electricity-to-magnetism, the generated opposing field is less than the original, thus only slowing the magnet's travel.

In a superconducting scenario, you CAN levitate the magnet...
Let me say that far more succinctly...

From my Masters Thesis of old:



__________________
Yellow + Blue Jerseys!

Get your Cranky T-Shirt!
Men's
and Women's designs available
ehidle is offline   Reply With Quote
Old 02-04-09, 11:25 AM   #19
Wordbiker
Pwnerer
 
Wordbiker's Avatar
 
Join Date: Jun 2005
Location: Pagosa Springs, CO, USA
Bikes: Road, MTB, Cruiser, Chopper, BMX
Posts: 2,907
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
jsharr is a witch.

Test: Build a bridge out of him.
__________________
Quote:
Originally Posted by ahsposo View Post
Ski, bike and wish I was gay.
Wordbiker is offline   Reply With Quote
Old 02-04-09, 04:48 PM   #20
skinnyone
Dude wheres my guads?
 
skinnyone's Avatar
 
Join Date: May 2005
Location: Guess
Bikes: Not enough
Posts: 2,680
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ehidle View Post
Let me say that far more succinctly...

From my Masters Thesis of old:



Dude don't tell me you have one of those t-shirts!
skinnyone is offline   Reply With Quote
Old 02-05-09, 09:56 AM   #21
ModoVincere
Riding Heaven's Highways on the grand tour
 
ModoVincere's Avatar
 
Join Date: Aug 2006
Bikes:
Posts: 1,675
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
X has brain!
UA uses a brain!
__________________
1 bronze, 0 silver, 1 gold
ModoVincere is offline   Reply With Quote
Old 02-05-09, 10:07 AM   #22
UnsafeAlpine
Domestic Domestique
 
UnsafeAlpine's Avatar
 
Join Date: Dec 2007
Location: Michigan
Bikes: Brand New Old Catamount! Schwinn Homegrown, Specialized FSR, Salsa Vaya, Salsa Chile Con Crosso
Posts: 1,742
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ModoVincere View Post
X has brain!
UA uses a brain!
I have to use x's brain... Mine's been melted.
UnsafeAlpine is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:49 PM.