Copper coins made before 1990 (1p and 2p's) aren't magnetic. Ones made after that are. I've tested this thoroughly.
Bumblebees shouldn't be able to fly according to the laws of physics. I think an advert prompted this one.
And look at that post count, it's an omen I tell you, a winning post..
QuoteOriginally posted by Benny@Mar 22 2005, 10:47 AM
Copper coins made before 1990 (1p and 2p's) aren't magnetic. Ones made after that are. I've tested this thoroughly.
[post=80154]Quoted post[/post]
Does that mean that Bank heists won't require the robbers to have guns anymore then?.....just a Bl**dy big magnet to attract he dosh and as a by product they can disarm the Police as well!!
Youv'e a genius Criminal mind Benny :D
The bumble bee one doesn't work anymore, as they now know how bees do it. They have special glands in their heads that create a helium type gas. This gas is pumped into small chambers behind their wings. The furious beating of their little wings creates heat which is passed into the chambers through tiny blood vessels, and this in turn warms the helium gas up. Helium being lighter than air adds lift and so the bee can fly.
Bees therefore are in fact little hot air balloons. Amazing eh.
QuoteOriginally posted by smilodon@Mar 22 2005, 01:06 PM
The bumble bee one doesn't work anymore, as they now know how bees do it. They have special glands in their heads that create a helium type gas. This gas is pumped into small chambers behind their wings. The furious beating of their little wings creates heat which is passed into the chambers through tiny blood vessels, and this in turn warms the helium gas up. Helium being lighter than air adds lift and so the bee can fly.
Bees therefore are in fact little hot air balloons. Amazing eh.
[post=80158]Quoted post[/post]
Wow, you rock.
Oh and now I've ruined my post count ;)
thats a brilliant fact that i bet not many know...
(notes that one down for the pub)
QuoteOriginally posted by smilodon@Mar 22 2005, 12:06 PM
The bumble bee one doesn't work anymore, as they now know how bees do it. They have special glands in their heads that create a helium type gas. This gas is pumped into small chambers behind their wings. The furious beating of their little wings creates heat which is passed into the chambers through tiny blood vessels, and this in turn warms the helium gas up. Helium being lighter than air adds lift and so the bee can fly.
Bees therefore are in fact little hot air balloons. Amazing eh.
[post=80158]Quoted post[/post]
hmmmmm the hindenburg bumble bee :D
QuoteOriginally posted by Jamoe@Mar 22 2005, 01:23 PM
thats a brilliant fact that i bet not many know...
(notes that one down for the pub)
[post=80168]Quoted post[/post]
Then they'll think you've had helium.
QuoteA long time ago [1989] I wrote an article for the journal American
Scientist entitled: "The Flight of the Bumblebee and Related Myths of
Entomological Engineering" (Am. Sci., Vol. 77, pp. 164-8). In this I
gave what still appears to be a correct account of the "Didn't the
aerodynamicist prove that the bumblebee can't fly ? [sarcastic ha ha]"
story. I too had tried to find the name of "The aerodynamicist" who
did this to us. After a long search I was told by a very reputable
source that he thought that individual (who was badly misrepresented
subsequently by the "press") was the Swiss gas dynamicist Jacob
Ackeret - a famous name in supersonic aerodynamics. It was about the
right vintage, so I wrote that in my article without naming Ackeret
explicitly. Follwoing publication, however, I got mail. Boy did I
get mail - including half a dozen xerox copies of portions of the text
of the book Le Vol Des Insects (Hermann and Cle, Paris, 1934) by the
famous entomologist August Magnan. On page 8 of the introduction, one
finds:
"Tout d'abord pouss'e par ce qui fait en aviation, j'ai applique' aux
insectes les lois de la resistance del'air, et je suis arrive' avec
M. SAINTE-LAGUE a cette conclusion que leur vol es impossible."
Thus the culprit is finally named: Sainte-Lague, Magnan's lab
assistant who was apparently some sort of engineer. Steve Vogel has
correctly added some of the rest of the story and there is more to
come thanks to the miracles of high-speed photography and advances in
computational physics. As an aside, anyone who hasn't read Steve's
wonderful books should. They are classics - all of them.
Share and enjoy.
John McMasters
Technical fellow
The Boeing company
Seattle, Washington
QuoteBumblebees clearly can fly, so either the laws of aerodynamics are wrong or our understanding of them is suspect. There is a problem, however, so long as we think of bumblebees as fixed-wing aircraft: the surface area of the wings relative to the volume and mass of the body would not be capable of lifting the bees off the ground. However, bumblebees are not fixed-wing aircraft: they are helicopters. Each of the two hind wings couples to the forewings by means of a row of tiny hooks or hamuli, which engage with the trailing edge of the forewings. This creates a functional, hinged unit which is very flexible along its longitudinal axis: the wing-tips describe a figure of eight pattern as the wings beat and this creates vortices along the length of the wings which create more than enough lift to facilitate flight. The laws of aerodynamics are thus not compromised and flight engineers can sleep again at night.
QuoteThey have special glands in their heads that create a helium type gas.
:lmfao: :lmfao: :lmfao:
Yep, but he gets them everytime!! :D :D
reel em in smilo :D