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True facts (Read 2433 times)
Nov 5
th
, 2012 at 5:18pm
Webb
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Colonel
Go 'Noles!
Morningwood Golf Resort
Posts: 1068
The "Mach" measurement is based on the speed of sound. Mach 2 is twice the speed of sound, mach 3 is tree times the speed, etc. However, sound will travel at different speeds depending on the medium it is passing through. Due to this, the "Mach" number is based on the speed of sound in a vacuum.
A bad day at golf is better than a good day at work.
Jim
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Reply #1 -
Nov 5
th
, 2012 at 6:50pm
Fozzer
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Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Speed of sound in a vacuum:
...."In space, no one can here you scream!"...
...!
Paul...
...!
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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Reply #2 -
Nov 5
th
, 2012 at 7:05pm
wahubna
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WMU Bronco
Michigan
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I am a little confused here because having just finished a year of aerodynamics we never discussed it being defined in a vacuum....or maybe the joke is that this is completely false anyways?
"At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation."- Igor Sikorsky
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Reply #3 -
Nov 5
th
, 2012 at 9:08pm
Webb
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Colonel
Go 'Noles!
Morningwood Golf Resort
Posts: 1068
While most people associate spaghetti with Italy, the spaghetti tree is actually an invasive species originally from China.
A bad day at golf is better than a good day at work.
Jim
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Reply #4 -
Nov 5
th
, 2012 at 9:21pm
Steve M
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Cambridge On.
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Webb wrote
on Nov 5
th
, 2012 at 9:08pm:
While most people associate spaghetti with Italy, the spaghetti tree is actually an invasive species originally from China.
Still waiting for the seeds I ordered.
Flying with twins is a lot of fun..
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Reply #5 -
Nov 5
th
, 2012 at 10:06pm
Ang2dogs
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No matter where you go,
there you are.
black mountain hills of Dakota
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Webb wrote
on Nov 5
th
, 2012 at 9:08pm:
While most people associate spaghetti with Italy, the spaghetti tree is actually an invasive species originally from China.
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Reply #6 -
Nov 6
th
, 2012 at 1:27am
COBS
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F-111 Pig HUD Project
Australia
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Careful when you order the seeds , I wanted tubular spaghetti ,my tree only produces Fettucine .
That's probably why they say the Chinese are inscrutible , of course I couldn't read the label , so perhaps I planted the seed upside down .
Karol
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Reply #7 -
Nov 6
th
, 2012 at 7:34pm
Webb
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Colonel
Go 'Noles!
Morningwood Golf Resort
Posts: 1068
The historical consensus is that the Battle of Chickamauga never occurred. Due to poor quartermastering, both armies found they were missing a substantial amount of ammunition and couldn't account for its loss. Concerns about being held liable led to a series of covert communications between Generals Bragg and Rosecrans. They agreed to file reports that they had fought a battle, which would account for the missing ammunition. Support for the deception was achieved by various means: reporters wanted an opportunity to file stories, subordinate officers wanted chances for promotions, and the soldiers were bought off with a lottery which allowed several thousand of them to leave the army on the pretense that they had been casualties. The actual outcome of the supposed battle was decided by a coin toss.
A bad day at golf is better than a good day at work.
Jim
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Reply #8 -
Nov 7
th
, 2012 at 6:33pm
Webb
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Colonel
Go 'Noles!
Morningwood Golf Resort
Posts: 1068
The inventor of Kleenex called it "tissue" because it sounds like the noise of a sneeze.
A bad day at golf is better than a good day at work.
Jim
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Reply #9 -
Nov 8
th
, 2012 at 4:58am
COBS
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Colonel
F-111 Pig HUD Project
Australia
Gender:
Posts: 33
Ah .. tissue !
That's what I love about aviation , you learn something new every day .
Now all I have to do is find a use for all that knowledge.
I did notice with my last sneeze one thing :
1. No double sonic booms , therefore sneeze velocity was sub sonic.
If the speed of sound varies depending on the medium it travels through , I can't help but wonder if it has an affect on the fortune as told by that Fortune teller (medium) , also
if the sonic boom shock wave is greater than M 1.0 would it crack the fortune teller's crystal ball ?
Supersonics could eventually put Fortune tellers out of business and replace them completely by Fortune cookies.
Karol
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Reply #10 -
Nov 8
th
, 2012 at 4:10pm
EVVFCX
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Been there done it-well
most of it.
Pontefract, West Yorkshire
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The speed of sound in water is approx 5 times what it is at the surface, this is why you see signs on aquariums not to tap the glass as the shock wave can injure the fish etc.
If I'm under water and scream, it means somebody would hear me 5 time quicker than at the surface: but seeing as I've just screamed underwater: I've just drowned
Steve
May the Mynd be with you.
So far my number of landings either passenger or pilot equal my number of takeoffs, but that is due to change
13/07/11 Passed BMFA Fixed Wing 'A' test.
FSX Gold
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Reply #11 -
Nov 8
th
, 2012 at 6:07pm
Webb
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Colonel
Go 'Noles!
Morningwood Golf Resort
Posts: 1068
Benjamin Franklin invented not only bifocals, but also toast, Christmas socks, the word "has," and those large wooden spoons people hang on their walls.
A bad day at golf is better than a good day at work.
Jim
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Reply #12 -
Nov 9
th
, 2012 at 6:18pm
Webb
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Go 'Noles!
Morningwood Golf Resort
Posts: 1068
Johannes Kepler was inspired by his mistresses' ample bosom to describe the orbital mechanics of the solar system.
A bad day at golf is better than a good day at work.
Jim
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Reply #13 -
Nov 10
th
, 2012 at 2:56am
H
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2003: the year NH couldn't
save face...
NH, USA
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Webb wrote
on Nov 5
th
, 2012 at 5:18pm:
However, sound will travel at different speeds depending on the medium it is passing through. Due to this, the "Mach" number is based on the speed of sound in a vacuum.
So, you're saying sound has a spiritual air about it and an empty-headed medium is a sound trap?
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Reply #14 -
Nov 10
th
, 2012 at 3:32am
Fozzer
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Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Webb wrote
on Nov 9
th
, 2012 at 6:18pm:
Johannes Kepler was inspired by his mistresses' ample bosom to describe the orbital mechanics of the solar system.
They will be carrying out a practical demonstration on the TV science channel tonight*....
...!
Make a note...
...
...!
Paul...
...!
* ...maybe...
Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.
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