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General Category => General Board => Cogitative Corner => Topic started by: Marty on November 08, 2010, 04:16:23 AM

Title: Mind-share
Post by: Marty on November 08, 2010, 04:16:23 AM
Know something interesting?
Share it!
Simples!
SQUEEK!

Lots of people on here know interesting things about diverse subjects. Others know things that might seem obvious to them but have other people completely at sea. This thread is about everyone just posting any information that they've come across recently, think interesting or important, or even just plain zany facts.

Obviously, typical BFM rules apply - everything must be child-friendly and inoffensive, religiously, politically, culturally or otherwise. Other than that, anything goes!
Title: Re: Mind-share
Post by: -Ajax- on November 08, 2010, 09:30:10 AM
Did you know...

Looking at a statue...
If the horses front feet air both in the air, the soldier died in battle  
If one of the horses feet is in the air, the soldier died as a result of injuries off the battlefield  
If both feet are on the floor, the soldier died of natural causes

Yeah...
Title: Re: Mind-share
Post by: RadZakpak on November 08, 2010, 05:26:22 PM
Did you know...

Looking at a statue...
If the horses front feet air both in the air, the soldier died in battle  
If one of the horses feet is in the air, the soldier died as a result of injuries off the battlefield  
If both feet are on the floor, the soldier died of natural causes

Yeah...

Whoa......thats like....awesome info right thar.

Quote
Whenever a child weeps, parents of that child start worrying about their behavior.   Japan Scientist invents an instrument which will tell the reason why the child weeps. It will tell why he’s weeping by recognizing his behavior and tell his parent whether he is hunger or he is feeling uncomforted due to his clothes. Inventors say its accuracy is about 96% and it will really helpful for the people who have newly born baby and not able to understand the basic necessities of their child.


Sounds awesome to me  :LOL:


Title: Re: Mind-share
Post by: MrMxyzptlk on November 08, 2010, 09:45:33 PM


Courtesy of an Astronomy class I took this summer....


If left unabated our Moon will continue in its retreat* until it would take bout 47 days to orbit the Earth. Both Earth and Moon would then keep the same faces permanently turned toward one another as Earth's spin would also have slowed to one rotation every 47 days.

This appears to be the "norm" for simple planet/moon systems throughout the cosmos, and is likely the "steady state" for all such systems.

* The Moon is being pushed away from Earth by about 1.6 inches (~4 centimeters) per year and our planet's rotation is slowing.  And no, things won't fly off the planet or get heavier as a result!  :haw:


...And a NOTE, please: Let's see things posted that have valid supporting evidence rather than hearsay, k?  TYVMiA!

Title: Re: Mind-share
Post by: BFM_Kiwi on November 09, 2010, 02:16:16 AM

The coolest thing about what Mxy just said is that it is caused by "tidal friction".  The sloshing around of the tides, caused by the gravitation pull between the earth and moon, dissipates energy and as that energy is lost (turned into heat in the earth's oceans) that has to be matched (conservation of energy) by an increase in potential energy by the moon, so it moves slightly further away. 

Title: Re: Mind-share
Post by: MrMxyzptlk on November 09, 2010, 01:56:33 PM


...And yet COOLER is that most (not Jupiter) of the planets in our Solar System will also reach in this state, despite not having substantial amounts of liquid as we have here on Earth!

The LIQUID tidal forces on our planet have delayed this eventuality for us!  (I.e Yes, there ARE "tidal forces" on solid planets from their moons!  Since they are more "brittle, their effect is more substantial over time, and hence they "lock faces" with their planets more quickly....)


Okay.  Enough about cool, little-known gravitational effects!  ::)

 :winkgrin:

Title: Re: Mind-share
Post by: -Ajax- on November 09, 2010, 02:47:10 PM
Did you know...

Beluga whales are at the top of the food chain. A nice distinction, however, it also means they acquire the sum total of toxins in the organisms in that chain. Since PCBs and heavy metals don't break down in any organism they accumulate instead.  

So when a Beluga eats a salmon that ate a crustacean that grubbed on some plant, all the PCBs and heavy metals that these organisms absorbed end up in the beluga.  

Belugas, in fact, are so full of contaminants, when they are found beached they qualify as a toxic biohazard.

Yeah...
Title: Re: Mind-share
Post by: MrMxyzptlk on November 09, 2010, 10:37:47 PM



I had some running socks once that got declared a biohazard....

 :winkgrin:


Did you know that - in order to more closely align the 365-day Gregorian calendar with the actual time it takes the earth to revolve round the Sun* - there are NO Leap Years on century years, UNLESS they are also divisible by 400.  [ link (http://en.wikipedia.org/wiki/Leap_year) ]

So if you're reading this you likely have just lived through the once-in-every-several-thousand-years event of the millennial year 2000 having NOT been a leap year for that rare reason!


* The vernal equinox year is about 365.242374 days long (and increasing).

Title: Re: Mind-share
Post by: BFM_Fénix on November 18, 2010, 02:40:52 PM
Something small, yet interesting

Did you know...

That while some substances are considered to be toxic, EVERYTHING can cause negative effects in the body. For instance, some examples:
- Salt: If you put the equivalent of 1 normal spoon directly in your blood (if you try to swallow that amount of salt you would throw up normally) you die.
- Water: There was a case of someone who drank 20lt of water in half an hour. He died. Literally, you can dilute.
- Oxygen: If there is a high level of oxygen in your blood (excesive ventilation) the pH of the blood rises and you get respiratory alkalosis affecting the musles (you can get tetany)

So please, don't do anything in excess (except for thinking, you just need more nutrients)  :LOL:
Title: Re: Mind-share
Post by: Zeek on January 06, 2011, 02:58:03 PM
ok sorry i am going to WW1 history but during the war there was a metal called the Blue Max which was given to The Red Barron who was a famious pilot for Germany, who had 80 kills before he was killed.
The Blue Max was also given to captins in the navy for Germany. The person that sank the lusitania was given the reward.

Quote
The first pilot to receive the award had to have 8 aerial victories. By January 1917 the requirements had been raised to sixteen victories. During the same conflict, the medal was also awarded to U Boat captains who had sunk 190,000 tons of enemy shipping.




*quote is from a website.
Title: Re: Mind-share
Post by: ¥Mderms¥ on January 09, 2011, 03:05:24 PM
Something small, yet interesting

Did you know...

That while some substances are considered to be toxic, EVERYTHING can cause negative effects in the body. For instance, some examples:
- Salt: If you put the equivalent of 1 normal spoon directly in your blood (if you try to swallow that amount of salt you would throw up normally) you die.
- Water: There was a case of someone who drank 20lt of water in half an hour. He died. Literally, you can dilute.
- Oxygen: If there is a high level of oxygen in your blood (excesive ventilation) the pH of the blood rises and you get respiratory alkalosis affecting the musles (you can get tetany)

So please, don't do anything in excess (except for thinking, you just need more nutrients)  :LOL:

Thats interesting, as there is a record for someone eating so many bricks of salt in one day...


Title: Re: Mind-share
Post by: BFM_Edison on January 16, 2011, 02:54:05 PM
What's the main reason for Jupiter not reaching the state mentioned earlier? I'm curious as to why it would apply to Jupiter but not, say, Saturn.

The Tevatron, the second highest energy particle collider next to the LHC (and thus was the highest for about 20 years) will be ceasing operations in September of this year. It's located in Illinois and it is sad that a lack of extra funding will be preventing it from continuing for three more years :(
Title: Re: Mind-share
Post by: Marty on January 17, 2011, 02:37:58 AM
there are NO Leap Years on century years, UNLESS they are also divisible by 400...So if you're reading this you likely have just lived through the once-in-every-several-thousand-years event of the millennial year 2000 having NOT been a leap year for that rare reason!

2000/400 = 5.

2000 was a leap year. 1900, 2100, 2200 and 2300 are the nearest ones that won'e be.
Title: Re: Mind-share
Post by: BFM_Edison on January 23, 2011, 12:29:51 AM
Some very recent, current news. As everyone knows, there are multiple ways to add numbers to get a specific number. For example, you can get 5 by adding 2+3, 1+4, 1+1+3, and so on. While this may seem fairly trivial and useless, it actually comes up in many areas of math and physics, such as Abstract Algebra in the form of the partition function, p(n). Basically, the value of p(n) is the number of unique (up to isomorphism) ways you can add positive integers to form n, which is also a positive integer (if n <= 0, then p(n) is defined to be 0). For example, let us find p(5):

(1) 1+1+1+1+1=5
(2) 1+1+1+2=5
(3) 1+2+2=5
(4) 1+1+3=5
(5) 2+3=5
(6) 1+4=5
(7) 5=5

Thus we find that p(5) = 7. As you might be able to tell, as we go to higher values of n, this gets more and more complicated in terms of determining it this way, though you might hope that there is a simple pattern. These are the first 10 values for n=1,2,...10: 1, 2, 3, 5, 7, 11, 15, 22, 30, 42. For n=1000, p(n)=24,061,467,864,032,662,473,692,149,727,991. This is quite a large number indeed, and there isn't really any immediate pattern found, though there is an explicit function for it of sorts, it is not so simply evaluated and uses an infinite summation. However, recently (ie. the news is about 3 days old), an algebraic formula has been discovered that involves no such infinite sums and is much more powerful in determining values of p(n), which is quite a discovery. The paper on it is authored by Jan Hendrik Bruinier and Ken Ono.

Here's a link to the results of the paper: http://www.aimath.org/news/partition/brunier-ono.pdf
Title: Re: Mind-share
Post by: BFM_Kiwi on January 24, 2011, 09:38:32 PM

1, 2, 3, 5, 7, 11, 15, 22, 30, 42 looks sort like Fibonacci though, doesn't it.  Almost kinda.
Title: Re: Mind-share
Post by: Tanxs1 on January 25, 2011, 09:50:17 AM
No  Kiwi :P. The first few numbers are similiar tho.

If I remember correctly, the Fibonacci numbers are:

1, 1, 2, 3, 5, 8, 13, 21, 34, 45, 79, 123, 202, 325, 527, 852 etc. etc.

Each number is the addition of the two numbers before it, where at the start it is just one because there is nothing to add. I typed out all of them without the use of a calculator! :D

I feel smart :).

Ya... when I was liek 9 I read a book on it. It had pictures of bunnies, ok?
Title: Re: Mind-share
Post by: jim360 on January 25, 2011, 11:22:58 AM
Your calculator phails, it's:

0 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 etc.

Every 15th number in the Fibonacci sequence ends in 0.

(The first 0 is the 0th Fibonacci number, so you can ignore it.)
Title: Re: Mind-share
Post by: BFM_Kiwi on January 25, 2011, 12:57:30 PM

I know it's not fibonacci which is probably why I said sorta, kinda and almost :P

Title: Re: Mind-share
Post by: Lucky on January 25, 2011, 01:36:01 PM
England is old and small, so in the Middle Ages they started running out of places to bury people. So, they would dig up coffins and would take their bones to a house and re-use the grave. In reopening these coffins, one out of 25 coffins were found to have scratch marks on the inside and they realized they had been burying people alive. So they thought they would tie a string on their wrist and lead it through the coffin and up through the ground and tie it to a bell. Someone would have to sit out in the graveyard all night to listen for the bell. Hence on the ‘graveyard shift’ they would know that someone was ‘saved by the bell’, or he was a ‘dead ringer’.
Title: Re: Mind-share
Post by: Tanxs1 on January 25, 2011, 01:39:37 PM
21 + 34 isn't 45, Tanxs  :doh:.

I wouldn't use a calculator for that :P. Simple error that messed everything up ^_^.
Title: Re: Mind-share
Post by: jim360 on January 25, 2011, 03:25:33 PM
England is old and small, so in the Middle Ages they started running out of places to bury people. So, they would dig up coffins and would take their bones to a house and re-use the grave. In reopening these coffins, one out of 25 coffins were found to have scratch marks on the inside and they realized they had been burying people alive. So they thought they would tie a string on their wrist and lead it through the coffin and up through the ground and tie it to a bell. Someone would have to sit out in the graveyard all night to listen for the bell. Hence on the ‘graveyard shift’ they would know that someone was ‘saved by the bell’, or he was a ‘dead ringer’.

A little learning is a dangerous thing...

"Saved by the bell" is a boxing idiom.

"Dead ringer" comes from horse racing - one horse would be swapped for another, similar-looking, one just before the race.

"Graveyard shift" comes from the US and has nothing to do with listening to bells.

All three of these come from the US originally anyway.

http://www.phrases.org.uk/meanings/saved-by-the-bell.html
Title: Re: Mind-share
Post by: Marty on January 26, 2011, 01:37:18 AM
England is old and small, so in the Middle Ages they started running out of places to bury people. So, they would dig up coffins and would take their bones to a house and re-use the grave. In reopening these coffins, one out of 25 coffins were found to have scratch marks on the inside and they realized they had been burying people alive. So they thought they would tie a string on their wrist and lead it through the coffin and up through the ground and tie it to a bell. Someone would have to sit out in the graveyard all night to listen for the bell. Hence on the ‘graveyard shift’ they would know that someone was ‘saved by the bell’, or he was a ‘dead ringer’.

And I'm not certain about re-using graves either...see, at various local churchyards you can see that the church has stonework that has been covered by the ground. Your first conclusion might be that the foundations weren't very good so the building is sinking.

However, it appears that the reason why the ground is higher is because there have been so many bodies buried that the ground has actually been raised by the number of graves.

Quote from: Bill Bryson: 'At Home'
[while touring a small church in Norfolk]

"...it isn't because the church is sinking...How many people do you suppose are buried here?"

I glanced appraisingly at the gravestones and said, "I don't know. Eighty? A hundred?"

"I think that's probably a bit of an underestimate...A country parish likes this has an average of 250 people in it, which translates into roughly a thousand adult deaths per century, plus a few thousand more poor souls that never reached maturity. Multiply that by the number of centuries the church has been here and what you have is...probably something more like twenty thousand...That's a lot of mass...It's why the ground has risen three feet...There are a thousand parishes in Norfolk...From here you can see into perhaps ten or twelve other parishes, so you are probably looking at roughly a quarter million burials...in a place that has never been anything but quiet and rural, where nothing much has ever happened."
Title: Re: Mind-share
Post by: jim360 on January 26, 2011, 04:00:22 AM
England is old and small, so in the Middle Ages they started running out of places to bury people. So, they would dig up coffins and would take their bones to a house and re-use the grave. In reopening these coffins, one out of 25 coffins were found to have scratch marks on the inside and they realized they had been burying people alive. So they thought they would tie a string on their wrist and lead it through the coffin and up through the ground and tie it to a bell. Someone would have to sit out in the graveyard all night to listen for the bell. Hence on the ‘graveyard shift’ they would know that someone was ‘saved by the bell’, or he was a ‘dead ringer’.

In fact this is the 11th point of an internet essay from 1999, called "Life in the 1500s", about English History and idioms connected with it. It is almost 100% wrong. It is also written by an American who, presumably, was just having a laugh - since it was written in April, and probably April 1st. Almost all the phrases in it come from much later and from the US.
 
Title: Re: Mind-share
Post by: Lucky on January 26, 2011, 05:14:28 AM
England is old and small, so in the Middle Ages they started running out of places to bury people. So, they would dig up coffins and would take their bones to a house and re-use the grave. In reopening these coffins, one out of 25 coffins were found to have scratch marks on the inside and they realized they had been burying people alive. So they thought they would tie a string on their wrist and lead it through the coffin and up through the ground and tie it to a bell. Someone would have to sit out in the graveyard all night to listen for the bell. Hence on the ‘graveyard shift’ they would know that someone was ‘saved by the bell’, or he was a ‘dead ringer’.

A little learning is a dangerous thing...

"Saved by the bell" is a boxing idiom.

"Dead ringer" comes from horse racing - one horse would be swapped for another, similar-looking, one just before the race.

"Graveyard shift" comes from the US and has nothing to do with listening to bells.

All three of these come from the US originally anyway.

http://www.phrases.org.uk/meanings/saved-by-the-bell.html

Sorry I don't trust UK sites.
Title: Re: Mind-share
Post by: jim360 on April 06, 2011, 04:36:52 AM
Did you know that, if you ever want to work out how many seconds there are in a year without using a calculator, just tell whichever nub is asking you that (look it up, sheesh!) that it's "pi"*107? Pi as in 3.14159265358979323...

This is bizarrely a seriously good approximation, giving you an answer of 31,415,927 seconds when the "real" answer is closer to 31,557,000 seconds. But it's a very good approximation and even has the advantage of possible cancelling out with any other pi you may have in the sum.
Title: Re: Mind-share
Post by: Tanxs1 on April 06, 2011, 07:18:00 AM
Did you know that, if you ever want to work out how many seconds there are in a year without using a calculator, just tell whichever nub is asking you that (look it up, sheesh!) that it's "pi"*107? Pi as in 3.14159265358979323...

This is bizarrely a seriously good approximation, giving you an answer of 31,415,927 seconds when the "real" answer is closer to 31,557,000 seconds. But it's a very good approximation and even has the advantage of possible cancelling out with any other pi you may have in the sum.

60x60x60x24x365 (assuming not a leap year) would be correct... wouldn't it three60? *Confused face*

Title: Re: Mind-share
Post by: jim360 on April 06, 2011, 08:33:23 AM
Yes, that's roughly it. Though it's better to do 3600*24*365.2425 since that's closer to how long a year really lasts. Since not that many of us can do this in our head, it's nice to have a seriously easy-to-recall value that's accurate to about 99% without having to do any calculation whatsoever!
Title: Re: Mind-share
Post by: Trael on April 07, 2011, 08:52:05 PM
Did you know 60% of the 'junk' under your fingernails if feces? Gotta wash your hands  :siderofl: with this gross fact.
Title: Re: Mind-share
Post by: jim360 on June 23, 2011, 03:04:17 PM
It's very important to have a lot of sleep, obviously. Teenagers suffer from sleeplessness a lot, not just because of the strange hours they keep... but also because it's just part of growing up - they need a fair amount of sleep still and yet feel less tired at night than they ought to.

It's a serious problem and one we should all make sure we're addressing, that we are getting enough sleep. For those of you who drive it's particularly important, because if you are slightly sleepy behind the wheel one study suggests that this makes you 2.1 times more likely to have an accident.

So go to bed when your Mum tells you to! It's for your own good.
Title: Re: Mind-share
Post by: Marty on June 24, 2011, 04:45:12 AM
It's very important to have a lot of sleep, obviously. Teenagers suffer from sleeplessness a lot, not just because of the strange hours they keep... but also because it's just part of growing up - they need a fair amount of sleep still and yet feel less tired at night than they ought to.

Confusingly, each successive scientific report on the amount of sleep that is best for you produces different results. Until about five years ago, the recommended amount of sleep was about 8hrs a day. Recent studies indicate that 7hrs a day is the ideal amount, and that any more than 8 is detrimental to your health.
Title: Re: Mind-share
Post by: BFM_Fénix on June 24, 2011, 08:01:28 AM
Well, it is obvious each study reports different amount of sleep. Pretty much as metabolism, the process of sleep differs. I need around 7 hours of sleep for a normal rest, being 7.5 the best (empirically proven). It's all about the amount of energy you use throughout the day, your body's condition (i.e. illness) and how fast can your body replenish itself (teenagers are under the effect of lots of hormones, increasing the biochemical processes and, in consequence, affecting the sleep). It's your own little world after all...
Title: Re: Mind-share
Post by: Goalie on June 29, 2011, 05:19:47 PM
I always feel sleepy when I'm at work.  But it's not normally because I don't get enough sleep (being in college and waking up at 5:30am every day??????), it's more because my posture is horrible (my work is simple - sit down and watch others do their work).  Having my body slouched on a swivel stool causes my back to fold like an accordian and cut off my circulation, causing me to yawn and nod off.

Since I'm on the subject, your spinal cord is key for several parts of your body and bodily functions.  Slouching at work or in a chair can do more than just stress your back.  Things like your appetite, immune system, and reflexes are connected to your spinal cord and having bad posture will affect these areas.