Interesting fact
07-11-2009, 07:00 PM
#243
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07-11-2009, 07:20 PM
#245
Not so still working on the goldfish 
While it is possible for elephants to "fall" with all four feet off the ground simultaneously, the construction of their legs (and massive body size) preclude a "jump."
Elephants cannot jump. It is physiologically impossible for them to do so, because of their weight. You asked how come I see them jump down off platforms, stand on their front legs, and do all kinds of other tricks at the circus, they will step down from a platform, but will not jump.
While it is possible for elephants to "fall" with all four feet off the ground simultaneously, the construction of their legs (and massive body size) preclude a "jump."
Elephants cannot jump. It is physiologically impossible for them to do so, because of their weight. You asked how come I see them jump down off platforms, stand on their front legs, and do all kinds of other tricks at the circus, they will step down from a platform, but will not jump.
similar to the rules for "running" as per the rules for speed walking, you must have at least one foot on the flor at any time otherwise it constitues "running"
- FACT
07-11-2009, 08:03 PM
#248
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07-11-2009, 08:50 PM
#249
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08-11-2009, 01:58 AM
#264
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This appears to confirm the suspicion that pholcids can penetrate human skin, but that their venom is practically harmless to humans. Additionally, recent research by Alan Van Dyke has shown that pholcid venom is actually relatively weak in its effects on insects as well.
Ginge
08-11-2009, 09:43 AM
#268
PassionFord Post Troll
this freezeing and boiling of water is also a bit mute.
you can only assume the freezing and boiling, 0 to100c theory really if:
the water is at true netural pH of 7.7
a specfic gravity of 1.000
and completly free of any impurites
and at a 1 atmospheric bar
iirc, submarines use to boil the water instantly with thier propellors, at water levels of 125' +, i think the process is called cavitation.
(you can see this process with old war films with torpedos, running below the surface, though most torpedos at the time were oxygen propelled !)
08-11-2009, 10:27 AM
#270
In 2004, the Discovery Channel show MythBusters set out to test the daddy long-legs myth (Season 1, Episode 13 "Buried in Concrete"). After measuring the spider's fangs at approximately 0.25 mm (average human skin thickness varies from about 0.5mm to 4mm), the show's host was apparently bitten, although the bite produced little more than a mild short-lived burning sensation.
This appears to confirm the suspicion that pholcids can penetrate human skin, but that their venom is practically harmless to humans. Additionally, recent research by Alan Van Dyke has shown that pholcid venom is actually relatively weak in its effects on insects as well.
Ginge
This appears to confirm the suspicion that pholcids can penetrate human skin, but that their venom is practically harmless to humans. Additionally, recent research by Alan Van Dyke has shown that pholcid venom is actually relatively weak in its effects on insects as well.
Ginge
08-11-2009, 10:30 AM
#271
1 atmospheric bar can only be achieved at sea level!
this freezeing and boiling of water is also a bit mute.
you can only assume the freezing and boiling, 0 to100c theory really if:
the water is at true netural pH of 7.7
a specfic gravity of 1.000
and completly free of any impurites
and at a 1 atmospheric bar
iirc, submarines use to boil the water instantly with thier propellors, at water levels of 125' +, i think the process is called cavitation.
(you can see this process with old war films with torpedos, running below the surface, though most torpedos at the time were oxygen propelled !)
this freezeing and boiling of water is also a bit mute.
you can only assume the freezing and boiling, 0 to100c theory really if:
the water is at true netural pH of 7.7
a specfic gravity of 1.000
and completly free of any impurites
and at a 1 atmospheric bar
iirc, submarines use to boil the water instantly with thier propellors, at water levels of 125' +, i think the process is called cavitation.
(you can see this process with old war films with torpedos, running below the surface, though most torpedos at the time were oxygen propelled !)
but i'm right about it not being prooved to be a linier rate yes?
assuming all the above condition were met in the testing there is no way to translate them acros to every other envoroment yes?
08-11-2009, 10:51 AM
#272
PassionFord Post Troll
this as in a physiscs lessons over 20 years ago so you'll have t ogive me some credit for rememebring it at all
but i'm right about it not being prooved to be a linier rate yes?
assuming all the above condition were met in the testing there is no way to translate them acros to every other envoroment yes?
but i'm right about it not being prooved to be a linier rate yes?
assuming all the above condition were met in the testing there is no way to translate them acros to every other envoroment yes?
your exaclty right
08-11-2009, 04:34 PM
#277
Incorrect, depending on the weather it may be that just above sea level on some days.
If the way is completely free of any impurities, then its pH doesnt vary anyway so you have essentially specificed that twice, the same is true of its specific gravity, which is 1.000 by definition.
as mentioned previously
Yes thats true, its part of the noise that can give subs away IIRC
As a result they have two propellers as one unit with different prime numbers for the numbers of blades on each one to minimise constructive interference in the wave forms created by the pressure spots generated by the cavitation.
Richie or Rob can no doubt give a more accurate description than I just have though.
this freezeing and boiling of water is also a bit mute.
you can only assume the freezing and boiling, 0 to100c theory really if:
the water is at true netural pH of 7.7
a specfic gravity of 1.000
and completly free of any impurites
you can only assume the freezing and boiling, 0 to100c theory really if:
the water is at true netural pH of 7.7
a specfic gravity of 1.000
and completly free of any impurites
and at a 1 atmospheric bar
iirc, submarines use to boil the water instantly with thier propellors, at water levels of 125' +, i think the process is called cavitation.
(you can see this process with old war films with torpedos, running below the surface, though most torpedos at the time were oxygen propelled !)
(you can see this process with old war films with torpedos, running below the surface, though most torpedos at the time were oxygen propelled !)
As a result they have two propellers as one unit with different prime numbers for the numbers of blades on each one to minimise constructive interference in the wave forms created by the pressure spots generated by the cavitation.
Richie or Rob can no doubt give a more accurate description than I just have though.
Last edited by Chip; 08-11-2009 at 04:35 PM.
08-11-2009, 04:54 PM
#278
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