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05/26/2008 09:47:18 PM · #276 |
Originally posted by Bear_Music:
Originally posted by ellamay:
geese fly in a V shape so the tired ones fly at the back and are carried on the currents, the strong ones fly at the front of the V, thus all working with perfect teamwork. |
It's a popular theory, but far from a proven one. Another theory that has a lot of credibility has to so with communication. Interesting little article here.
Excerpt:
Scientists have tried to find the reason geese fly in vees, so far not successfully. There are two theories on the table - aerodynamic efficiency and ease of communication.
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Observations of actual flights, however, show that geese are seldom in optimum position for maximizing lift. This has led other researchers to suggest that geese fly in vees to keep each other in view and optimize communication.
R. |
I was recently watching a science show and they actually showed that geese fly in a V formation because aerodynamics prevents them from flying in a single file line. They showed actual video of geese flying and the wind currents coming off the front one disrupts the next bird in line and makes it fly all crazy. They put two models in a wind tunnel and sure enough, the next bird (model) in line always went astray and wouldn't stay on course. When they off centered the two models and turned on the fan they "flew" perfect.
Message edited by author 2008-05-26 21:47:31. |
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05/26/2008 09:53:26 PM · #277 |
Originally posted by sabphoto:
Originally posted by Bear_Music:
Originally posted by ellamay:
geese fly in a V shape so the tired ones fly at the back and are carried on the currents, the strong ones fly at the front of the V, thus all working with perfect teamwork. |
It's a popular theory, but far from a proven one. Another theory that has a lot of credibility has to so with communication. Interesting little article here.
Excerpt:
Scientists have tried to find the reason geese fly in vees, so far not successfully. There are two theories on the table - aerodynamic efficiency and ease of communication.
.....
Observations of actual flights, however, show that geese are seldom in optimum position for maximizing lift. This has led other researchers to suggest that geese fly in vees to keep each other in view and optimize communication.
R. |
I was recently watching a science show and they actually showed that geese fly in a V formation because aerodynamics prevents them from flying in a single file line. They showed actual video of geese flying and the wind currents coming off the front one disrupts the next bird in line and makes it fly all crazy. They put two models in a wind tunnel and sure enough, the next bird (model) in line always went astray and wouldn't stay on course. When they off centered the two models and turned on the fan they "flew" perfect. |
Interesting, I figured they flew in a V so they could shit on as much area as possible, who knew. |
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05/26/2008 10:35:39 PM · #278 |
| As bad as that way Trev, I laughed my arse off |
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05/26/2008 10:45:51 PM · #279 |
Originally posted by JulietNN:
As bad as that way Trev, I laughed my arse off |
:) |
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05/26/2008 11:54:24 PM · #280 |
On a moon or planet without "air"......put yourself on a straight rail car, train etc...
...mount a rifle at 90 degrees. Get up to speed...say....90mph...
...fire the rifle and keep the same speed on the car....when the bullet comes back to the "ground" say in 15 seconds, where does it land in relation to the car you fired it from?
The bullet lands back in the barrel of the gun...(or at least hits the barrel!)
Message edited by author 2008-05-26 23:55:05.
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05/27/2008 12:01:28 AM · #281 |
Originally posted by BeeCee:
Originally posted by Sugarpie:
baby crows have blue eyes that turn to brown as they become juveniles |
Caucasian baby humans have blue eyes at birth too, though it might change later. |
I know a lot of dogs also have blue eyes when born. I didn't know that about caucasian human babies. I was born with grey eyes, and I thought I was caucasian, what am I? |
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05/27/2008 12:03:29 AM · #282 |
If you aim a rifle level to the ground and fire the rifle while dropping a bullet from the same height as the barrel(same caliber and weight), both bullets will hit the ground at the same time, one just hits the ground much further away then the other. Velocity has no bearing on gravity.
Message edited by author 2008-05-27 00:04:21. |
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05/27/2008 12:09:53 AM · #283 |
Originally posted by trevytrev:
Velocity has no bearing on gravity. |
Umm... escape velocity? |
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05/27/2008 12:21:22 AM · #284 |
Originally posted by scalvert:
Originally posted by trevytrev:
Velocity has no bearing on gravity. |
Umm... escape velocity? |
Don't muddy up my facts with physics Shannon:) I was refering to gunfire moving parrell to the earth, though my physics is not so hot so I would have failed that anyway. Thanks for the lesson. |
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05/27/2008 12:31:11 AM · #285 |
Originally posted by trevytrev:
Originally posted by scalvert:
Originally posted by trevytrev:
Velocity has no bearing on gravity. |
Umm... escape velocity? |
Don't muddy up my facts with physics Shannon:) I was refering to gunfire moving parrell to the earth, though my physics is not so hot so I would have failed that anyway. Thanks for the lesson. |
Your example *might* be true on a flat earth, but cannot be on our home spheroid, as the earth drops away as the bullet travels laterally, so it has farther to fall than the one being dropped vertically. In fact, "being shot parallel (actually on a tangent) to the earth" at the correct speed is exactly what keeps satellites in orbit.
Message edited by author 2008-05-27 02:03:09. |
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05/27/2008 02:02:20 AM · #286 |
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05/29/2008 11:02:12 PM · #287 |
Originally posted by Man_Called_Horse:
Originally posted by Mr_Pants:
Originally posted by Man_Called_Horse:
Originally posted by Mr_Pants:
Originally posted by Man_Called_Horse:
Electricity will jump 1 inch per 1000 volts.
Stay away from high tension lines, you will get shocked...to death. |
I thought that that was 10kV per inch, not 1kV. |
Unless I misunderstood the instructor in my Safety and Training class, and my industry certification twords being an Entertainment Certified Electrician and Rigging Gaffer.....maybe. |
Yes, you did. |
Going to look it up...I'll be back to bask in my glorious knowledge from actually paying attention in school, or kneel before the king and send deserving accolades with the occasional victory song around some future camp fire. |
All righty then...
Apparently, the next campfire outing I attend, I will be singing a song in honor of Mr_Pants for his superior knowledge base.
In my defense, I was mislead by a typo in the safety and training classes I have been taking.
I asked my instructor, via the cell phone, what was up?
He explained it like this....
The "skin effect" of a charged cable is what basically can make voltage jump off of cable lines.
Electricity takes the path of least resistance, the core, depending on the circular mills of the cable, has the most resistance, and the skin of the cable has the least resistance.
If ya get too close to a high tension line, chances are that voltage will jump.
And yes, electricity will jump 1 inch per 10Kv.
Now I am off to get my camping gear ready.
Message edited by author 2008-05-29 23:04:32.
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05/30/2008 10:52:15 AM · #288 |
A dimpled golf ball would travel further than a non-dimpled one and a dimpled golf ball would travel further in air than in a vacuum if hit with the same initial velocity. An explaination can be given if needed...
You can ride a bike behind a bus and not have to pedal much at all.
Watertowers don't store water at all, they are used to maintain water pressure throughout the region they service.
Throwing a penny off of the empire state building (or any tall building) would not kill anyone but would hurt a little.
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05/30/2008 11:23:30 AM · #289 |
Just learned this last night:
Wordsworth, the great poet, invented the word "pandemonium"; it's from the Latin for "all the demons", and it is their place in hell. He also coined the phrase "self-esteem", like totally a few hundred years ahead of his time jejeje�
R. |
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05/30/2008 12:11:21 PM · #290 |
Useless, yet highly controversial thinking follows.
I didn't make this up. My college sociology professor told us this...
Human beings have an irresistable urge to pee on fires. Since the mechanics of males allow them to easily pee on fires, men are less capable of maintaining a fire. So, women were given the important role of maintaining 'the home fires'.
(I have remembered this bizarre idea for 20 years.) |
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05/30/2008 12:38:31 PM · #291 |
| A white cedar tree can live to be over a thousand years old. A "sapling" only 20cm high can be as old as one hundred years. (We have many ancient examples where I live, and they are very important in the religion of some of the First Nations people here.) |
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05/30/2008 01:25:58 PM · #292 |
Legend has it that buttons on men's jacket sleeves date back to the time of Napoleon Bonaparte. He wanted the men's uniforms to stay clean, and so to keep the men from wiping their noses on their sleeves he ordered buttons sewn over the top of the cuffs. With time the look became fashionable and carried over to civilians' jackets, with the buttons moved to the side.
The original cast iron Singer sewing machines were built so well that they were handed down to later generations... meaning no repeat customers. The concerned company responded by designing flimsier machines with new features that would break within a few years, and created a buy-back program for the older models. Any of the old machines returned under this program were taken to a dump and beaten with sledgehammers. In 1937, Daisy Singer Alexander (sole heiress to the Singer fortune) tossed a bottle into the Thames with a message that bequeathed her entire $8 million estate to whoever found it. The bottle was discovered by a very lucky San Francisco beachcomber in 1949. |
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05/30/2008 01:31:24 PM · #293 |
Originally posted by scalvert:
In 1937, Daisy Singer Alexander (sole heiress to the Singer fortune) tossed a bottle into the Thames with a message that bequeathed her entire $8 million estate to whoever found it. The bottle was discovered by a very lucky San Francisco beachcomber in 1949. |
That one's an urban legend. No proof of it has ever been found, and if it had happened there would be ample paperwork to prove it.
R.
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05/30/2008 01:33:24 PM · #294 |
| A plastic shopping bag is used for an average of twenty minutes in total, and takes 450 years to decompose. |
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05/30/2008 01:35:01 PM · #295 |
Originally posted by Louis:
A plastic shopping bag is used for an average of twenty minutes in total, and takes 450 years to decompose. |
Time out for smartass remark:
We had plastic shopping bags 450 years ago?
R.
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05/30/2008 01:36:42 PM · #296 |
| During WWII Singer Sewing Machine company was contracted by the US government to make the 1911A1 .45acp Side arm. They made 500 total and if you can find one in original condition it would be worth about $25,000 USD. |
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05/30/2008 01:39:20 PM · #297 |
Originally posted by Louis:
A plastic shopping bag is used for an average of twenty minutes in total, and takes 450 years to decompose. |
I read a statistic that states 9 in 10 plastic bottles are NOT recycled in the US. |
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05/30/2008 03:42:37 PM · #298 |
| A sealed 12oz can of soda can withstand an axial force of over 750lb before rupturing. |
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05/30/2008 03:50:58 PM · #299 |
A dimpled golf ball not only travels further, but straighter too!
Message edited by author 2008-05-30 15:51:35. |
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05/30/2008 03:53:57 PM · #300 |
| There are 293 ways to make change for a dollar. |
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