|
OrgoneConclusion
Blue Fish Group



Registered: 04/01/07
Posts: 45,414
Loc: Under the C
|
Most pi digits recited
#27060315 - 11/27/20 02:36 PM (3 years, 2 months ago) |
|
|
Rajveer Meena set the Guinness record of most pi digits memorized when he recited 70,000 digits in 9 hours, 7 minutes, while blindfolded, on March 21, 2015. Meena is the officially recognized world record-holder by Guinness World Records.
OK, but why? A great pick-up line at the singles bar? (Hey, where are you ladies going? I still have 69,943 more to go!) Looks good on your resume? Staves off boredom?
3.14 is close enough!
--------------------
|
Grapefruit
Freak in the forest


Registered: 05/09/08
Posts: 5,744
Last seen: 3 years, 1 month
|
|
I guess it's a nobler pursuit than masturbation at least.
-------------------- Little left in the way of energy; or the way of love, yet happy to entertain myself playing mental games with the rest of you freaks until the rivers run backwards. "Chat your fraff Chat your fraff Just chat your fraff Chat your fraff"
|
Buster_Brown
L'une


Registered: 09/17/11
Posts: 11,364
Last seen: 1 hour, 8 minutes
|
|
Quote:
OrgoneConclusion said:
OK, but why?
I ask myself the same thing about trigonometry. Just what is the point?
|
DividedQuantum
Outer Head


Registered: 12/06/13
Posts: 9,825
|
|
Humans and pointless activities have gone together a long time.
-------------------- Vi Veri Universum Vivus Vici
|
Rahz
Alive Again



Registered: 11/10/05
Posts: 9,248
|
|
Quote:
OrgoneConclusion said: Staves off boredom?
He is the Arnold Schwarzenegger of the nerd world.
Remember when I said I would count you last? I lied.
-------------------- rahz comfort pleasure power love truth awareness peace "You’re not looking close enough if you can only see yourself in people who look like you." —Ayishat Akanbi
|
redgreenvines
irregular verb


Registered: 04/08/04
Posts: 37,704
|
Re: Most pi digits recited [Re: Rahz]
#27061100 - 11/28/20 05:35 AM (3 years, 2 months ago) |
|
|
i got 3.14159 and never required more accuracy in my life as far as I know, but I have used some objects that may have required a system with more accuracy, like a camera lens.
--------------------
_ 🧠 _
|
Ferdinando


Registered: 11/15/09
Posts: 3,678
|
|
nice! it's important to know it puts a thing in the mind like an upgrade like a shield like a pusher I just learned it
it's how many % meditation is invaluable or it's 0,3% almost anything! I get 0,13 % as good as redgreenvines lsd
-------------------- with our love with our love we could save the world
Edited by Ferdinando (11/28/20 06:51 AM)
|
redgreenvines
irregular verb


Registered: 04/08/04
Posts: 37,704
|
Re: Most pi digits recited [Re: Ferdinando]
#27061347 - 11/28/20 09:43 AM (3 years, 2 months ago) |
|
|
not only that, PIZZA, circles within circles everyone loves Pizza, no?
--------------------
_ 🧠 _
|
Ferdinando


Registered: 11/15/09
Posts: 3,678
|
|
yes I love time and reality
-------------------- with our love with our love we could save the world
|
bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,890
Loc: Milky way
|
Re: Most pi digits recited [Re: Ferdinando]
#27061516 - 11/28/20 11:50 AM (3 years, 2 months ago) |
|
|
Quote:
Earlier this week, we received this question from a fan on Facebook who wondered how many decimals of the mathematical constant pi (π) NASA-JPL scientists and engineers use when making calculations:
Does JPL only use 3.14 for its pi calculations? Or do you use more decimals like say: 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360
We posed this question to the director and chief engineer for NASA's Dawn mission, Marc Rayman. Here's what he said:
Thank you for your question! This isn't the first time I've heard a question like this. In fact, it was posed many years ago by a sixth-grade science and space enthusiast who was later fortunate enough to earn a doctorate in physics and become involved in space exploration. His name was Marc Rayman.
To start, let me answer your question directly. For JPL's highest accuracy calculations, which are for interplanetary navigation, we use 3.141592653589793. Let's look at this a little more closely to understand why we don't use more decimal places. I think we can even see that there are no physically realistic calculations scientists ever perform for which it is necessary to include nearly as many decimal points as you present. Consider these examples:
The most distant spacecraft from Earth is Voyager 1. It is about 12.5 billion miles away. Let's say we have a circle with a radius of exactly that size (or 25 billion miles in diameter) and we want to calculate the circumference, which is pi times the radius times 2. Using pi rounded to the 15th decimal, as I gave above, that comes out to a little more than 78 billion miles. We don't need to be concerned here with exactly what the value is (you can multiply it out if you like) but rather what the error in the value is by not using more digits of pi. In other words, by cutting pi off at the 15th decimal point, we would calculate a circumference for that circle that is very slightly off. It turns out that our calculated circumference of the 25 billion mile diameter circle would be wrong by 1.5 inches. Think about that. We have a circle more than 78 billion miles around, and our calculation of that distance would be off by perhaps less than the length of your little finger.
We can bring this down to home with our planet Earth. It is 7,926 miles in diameter at the equator. The circumference then is 24,900 miles. That's how far you would travel if you circumnavigated the globe (and didn't worry about hills, valleys, obstacles like buildings, rest stops, waves on the ocean, etc.). How far off would your odometer be if you used the limited version of pi above? It would be off by the size of a molecule. There are many different kinds of molecules, of course, so they span a wide range of sizes, but I hope this gives you an idea. Another way to view this is that your error by not using more digits of pi would be 10,000 times thinner than a hair!
Let's go to the largest size there is: the visible universe. The radius of the universe is about 46 billion light years. Now let me ask a different question: How many digits of pi would we need to calculate the circumference of a circle with a radius of 46 billion light years to an accuracy equal to the diameter of a hydrogen atom (the simplest atom)? The answer is that you would need 39 or 40 decimal places. If you think about how fantastically vast the universe is — truly far beyond what we can conceive, and certainly far, far, far beyond what you can see with your eyes even on the darkest, most beautiful, star-filled night — and think about how incredibly tiny a single atom is, you can see that we would not need to use many digits of pi to cover the entire range.
https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/
|
OrgoneConclusion
Blue Fish Group



Registered: 04/01/07
Posts: 45,414
Loc: Under the C
|
Re: Most pi digits recited [Re: bodhisatta]
#27061693 - 11/28/20 02:13 PM (3 years, 2 months ago) |
|
|
I demand perfection!
--------------------
|
ch0ppie


Registered: 11/18/20
Posts: 593
|
Re: Most pi digits recited [Re: bodhisatta]
#27062364 - 11/29/20 02:06 AM (3 years, 2 months ago) |
|
|
Quote:
bodhisatta said:
Quote:
Earlier this week, we received this question from a fan on Facebook who wondered how many decimals of the mathematical constant pi (π) NASA-JPL scientists and engineers use when making calculations:
Does JPL only use 3.14 for its pi calculations? Or do you use more decimals like say: 3.141592653589793238462643383279502884197169399375105820974944592307816406286208998628034825342117067982148086513282306647093844609550582231725359408128481117450284102701938521105559644622948954930381964428810975665933446128475648233786783165271201909145648566923460348610454326648213393607260249141273724587006606315588174881520920962829254091715364367892590360
We posed this question to the director and chief engineer for NASA's Dawn mission, Marc Rayman. Here's what he said:
Thank you for your question! This isn't the first time I've heard a question like this. In fact, it was posed many years ago by a sixth-grade science and space enthusiast who was later fortunate enough to earn a doctorate in physics and become involved in space exploration. His name was Marc Rayman.
To start, let me answer your question directly. For JPL's highest accuracy calculations, which are for interplanetary navigation, we use 3.141592653589793. Let's look at this a little more closely to understand why we don't use more decimal places. I think we can even see that there are no physically realistic calculations scientists ever perform for which it is necessary to include nearly as many decimal points as you present. Consider these examples:
The most distant spacecraft from Earth is Voyager 1. It is about 12.5 billion miles away. Let's say we have a circle with a radius of exactly that size (or 25 billion miles in diameter) and we want to calculate the circumference, which is pi times the radius times 2. Using pi rounded to the 15th decimal, as I gave above, that comes out to a little more than 78 billion miles. We don't need to be concerned here with exactly what the value is (you can multiply it out if you like) but rather what the error in the value is by not using more digits of pi. In other words, by cutting pi off at the 15th decimal point, we would calculate a circumference for that circle that is very slightly off. It turns out that our calculated circumference of the 25 billion mile diameter circle would be wrong by 1.5 inches. Think about that. We have a circle more than 78 billion miles around, and our calculation of that distance would be off by perhaps less than the length of your little finger.
We can bring this down to home with our planet Earth. It is 7,926 miles in diameter at the equator. The circumference then is 24,900 miles. That's how far you would travel if you circumnavigated the globe (and didn't worry about hills, valleys, obstacles like buildings, rest stops, waves on the ocean, etc.). How far off would your odometer be if you used the limited version of pi above? It would be off by the size of a molecule. There are many different kinds of molecules, of course, so they span a wide range of sizes, but I hope this gives you an idea. Another way to view this is that your error by not using more digits of pi would be 10,000 times thinner than a hair!
Let's go to the largest size there is: the visible universe. The radius of the universe is about 46 billion light years. Now let me ask a different question: How many digits of pi would we need to calculate the circumference of a circle with a radius of 46 billion light years to an accuracy equal to the diameter of a hydrogen atom (the simplest atom)? The answer is that you would need 39 or 40 decimal places. If you think about how fantastically vast the universe is — truly far beyond what we can conceive, and certainly far, far, far beyond what you can see with your eyes even on the darkest, most beautiful, star-filled night — and think about how incredibly tiny a single atom is, you can see that we would not need to use many digits of pi to cover the entire range.
https://www.jpl.nasa.gov/edu/news/2016/3/16/how-many-decimals-of-pi-do-we-really-need/
Very interesting, kudos
|
laughingdog
Stranger

Registered: 03/14/04
Posts: 4,829
|
|
Quote:
OrgoneConclusion said: Rajveer Meena set the Guinness record of most pi digits memorized when he recited 70,000 digits ...
OK, but why? ...
2 answers
1) to get attention
2) because he is compulsive
3) because he actually is a very boring person
I said 2 answers, but gave 3, thats how much accuracy this question needs !
|
OrgoneConclusion
Blue Fish Group



Registered: 04/01/07
Posts: 45,414
Loc: Under the C
|
|
Quote:
I said 2 answers, but gave 3.14, thats how much accuracy this question needs !
--------------------
|
ch0ppie


Registered: 11/18/20
Posts: 593
|
|
Quote:
laughingdog said:
Quote:
OrgoneConclusion said: Rajveer Meena set the Guinness record of most pi digits memorized when he recited 70,000 digits ...
OK, but why? ...
2 answers
1) to get attention
2) because he is compulsive
3) because he actually is a very boring person
I said 2 answers, but gave 3, thats how much accuracy this question needs !
4) because the shrooms told him to do it
|
Loaded Shaman
Psychophysiologist



Registered: 03/02/15
Posts: 8,006
Loc: Now O'Clock
Last seen: 1 month, 15 days
|
|
MULTIPLY EVERYTHING BY ZERO GUYS, TRUST ME.
--------------------
  "Real knowledge is to know the extent of one’s ignorance." — Confucius
|
OutsideOfMyMind
LSD Self Administrative Director



Registered: 10/05/20
Posts: 5,439
Last seen: 12 hours, 43 minutes
|
|
Quote:
Buster_Brown said:
Quote:
OrgoneConclusion said:
OK, but why?
I ask myself the same thing about trigonometry. Just what is the point?
I asked myself the same thing about algebra. But when I took trigonometry, it made algebra make sense. It helped me to see the connection. Now I know that I could actually use algebra for useful things. Trigonometry has quite a bit of uses. First of all it can help you understand your psychedelic hallucinations, but it can also help you figure out the height of buildings based on their shadow, it can help you figure out how to program your car's computer if you change your tire size, and other things. I really love the whole a squared plus b squared equals c squared of a triangle. I love that all the angles of a triangle will always equal 180°. It's really helpful for calculus.
Anyway, when I was taking trigonometry, my favorite pi was pi over 6. I love that pi is equal to 180°. It always made me feel like a math geek writing my answers in radian instead of degrees. Don't get me wrong, degrees is very straightforward but radian just looks really fancy and pretty.
I had a pretty cool trigonometry professor. He was awesome. I got an A in that class and even though math is not my favorite subject I actually love that class. not class sort of made me like math. Now I'm teaching myself calculus before I take the class. I want to know what the professor is talking about. Taking trig with such a cool professor is what gave me more confidence in my math skills. I actually think it's easier to solve trig equations than it is to solve algebra equations. And as difficult as it is I also came to actually enjoy solving trig identities.
Edited by OutsideOfMyMind (12/06/20 01:14 AM)
|
Buster_Brown
L'une


Registered: 09/17/11
Posts: 11,364
Last seen: 1 hour, 8 minutes
|
|
Quote:
OutsideOfMyMind said:
Quote:
Buster_Brown said:
Quote:
OrgoneConclusion said:
OK, but why?
I ask myself the same thing about trigonometry. Just what is the point?
I asked myself the same thing about algebra. But when I took trigonometry, it made algebra make sense. It helped me to see the connection. Now I know that I could actually use algebra for useful things. Trigonometry has quite a bit of uses. First of all it can help you understand your psychedelic hallucinations, but it can also help you figure out the height of buildings based on their shadow, it can help you figure out how to program your car's computer if you change your tire size, and other things. I really love the whole a squared plus b squared equals c squared of a triangle. I love that all the angles of a triangle will always equal 180°. It's really helpful for calculus.
Anyway, when I was taking trigonometry, my favorite pi was pi over 6. I love that pi is equal to 180°. It always made me feel like a math geek writing my answers in radian instead of degrees. Don't get me wrong, degrees is very straightforward but radian just looks really fancy and pretty.
I had a pretty cool trigonometry professor. He was awesome. I got an A in that class and even though math is not my favorite subject I actually love that class. not class sort of made me like math. Now I'm teaching myself calculus before I take the class. I want to know what the professor is talking about. Taking trig with such a cool professor is what gave me more confidence in my math skills. I actually think it's easier to solve trig equations than it is to solve algebra equations. And as difficult as it is I also came to actually enjoy solving trig identities.
Algebra and Trigonometry = the next generation of Crossword puzzles imo.
|
bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,890
Loc: Milky way
|
|
Algebra and trigonometry predate crosswords by centuries
|
Buster_Brown
L'une


Registered: 09/17/11
Posts: 11,364
Last seen: 1 hour, 8 minutes
|
Re: Most pi digits recited [Re: bodhisatta]
#27075183 - 12/06/20 12:08 PM (3 years, 2 months ago) |
|
|
|
|