View Full Version : Ok, just a little math - Pi day tomorrow 3.1415926535...
3/14/15
:hurray:
Pi Day 2015: Ten digits represented on March 14 at 9:26:53. (http://www.slate.com/articles/health_and_science/science/2015/03/pi_day_2015_ten_digits_represented_on_march_14_at_9_26_53.html)
NeedSpeed
03-13-2015, 12:57pm
http://blog.quicktapsurvey.com/wp-content/uploads/2014/03/pi-day-quicktapsurvey.jpg
:dance:
I have a friend that is getting married tomorrow morning at that date :seasix:
NeedSpeed
03-13-2015, 2:39pm
I have a friend that is getting married tomorrow morning at that date :seasix:
Wedding Pie I hope :D
I have a friend that is getting married tomorrow morning at that date :seasix:
Pie bride - YouTube
Cybercowboy
03-13-2015, 3:16pm
You only need 39 digits of pi to accurately calculate the spherical volume of the universe.
NeedSpeed
03-13-2015, 3:27pm
You only need 39 digits of pi to accurately calculate the spherical volume of the universe.
How do you know it's a sphere? :D
Cybercowboy
03-13-2015, 3:37pm
How do you know it's a sphere? :D
Doesn't matter. The spherical volume of the observable universe is a thing that can be adequately quantified using 39 digits of pi, to the accuracy known. All the rest are a waste.
Trust me. (http://gizmodo.com/5985858/how-many-digits-of-pi-do-you-really-need)
NeedSpeed
03-13-2015, 3:50pm
Observable is a big word here. :shots:
Cybercowboy
03-13-2015, 3:52pm
Observable is a big word here. :shots:
Even if you assume the observable is less than 1% of the total (about what is currently conjectured) it would still be good within the size of a volume smaller than the orbital of a sodium atom.
NeedSpeed
03-13-2015, 3:52pm
Trust me. (http://gizmodo.com/5985858/how-many-digits-of-pi-do-you-really-need)
From the comments
Civil Engineer- 2 significant digits
Mechanical Engineer- 3 significant digits
Aerospace Engineer- 4 significant digits
Materials Science Engineer- 5 significant digits
Physicists- 39 significant digits
Social Scientist- what's a significant digit? That sounds like a penis. It must be a White Patriarchal conspiracy. Let's divert funds from your silly science and study how people feel.
:funnier:
Cybercowboy
03-13-2015, 3:53pm
For all practical purposes, using the square root of 10 suffices to any matter of calculation you're going to run into, and 3.14 is positively overkill most of the time.
NeedSpeed
03-13-2015, 4:02pm
I'm partial to 2.718. It gets no respect :(
355/113= 3.14159292...
accurate to 6 decimals
:type:
Cybercowboy
03-13-2015, 4:53pm
A famous mathematician said that 1 is a close enough approximation of pi for somewhat small circles. :D
Burro (He/Haw)
03-13-2015, 7:37pm
I'm not smart enough to understand this Pi day thing but I do have nice hair.
JRD77VET
03-13-2015, 7:41pm
I'm not smart enough to understand this Pi day thing but I do have nice hair.
As a machinist, I use Pi at work. I'm happy to have hair :hurray:
Burro (He/Haw)
03-13-2015, 7:47pm
As a machinist, I use Pi at work. I'm happy to have hair :hurray:
I actually use it too.
10" pipe is 10-3/4" outside diameter. 10.75" x Pi = 33.77". Therefore, one pass around a 10" pipe is 33.77 inches of weld. A 10" pipe weld is 3-4 passes. That's 135" of weld. Or about 11'.
I like pie. I have hair. But I'm more of a geometry guy. :seasix:
JRD77VET
03-13-2015, 7:56pm
I actually use it too.
10" pipe is 10-3/4" outside diameter. 10.75" x Pi = 33.77". Therefore, one pass around a 10" pipe is 33.77 inches of weld. A 10" pipe weld is 3-4 passes. That's 135" of weld. Or about 11'.
10.75 x 3.1415926539 = 33.772121026090277313473416370255 / 360 =0.09381144729469521475964837880626
Every degree on the circumference is .0938 measured radially.
If a bolt pattern was drilled on the OD and had a tolerance of plus or minus1/2 a degree, it would have to be with .0469 for proper location. :D
( all number copied from the calculator )
Burro (He/Haw)
03-13-2015, 8:00pm
If a bolt pattern was drilled on the OD
If a bolt pattern was drilled on the OD you'd have a flange. :D
http://ecx.images-amazon.com/images/I/91Oxv6K57KL.jpg
JRD77VET
03-13-2015, 8:10pm
If a bolt pattern was drilled on the OD you'd have a flange. :D
http://ecx.images-amazon.com/images/I/91Oxv6K57KL.jpg
No, that is a bolt circle on a face.
Think weld fixture for welding titanium. :yesnod: Holes on the outer edge
Milton Fox
03-13-2015, 9:49pm
http://www.iwallpapersfive.com/wp-content/uploads/2013/12/chocolate-bourbon-pecan-pie-sc-to-sf.jpg
DukeAllen
03-13-2015, 10:06pm
Keep the math, I'm more into reproductive biology :lol:
CertInsaneC5
03-13-2015, 11:37pm
I was told by DAB that there would be no math here. I feel betrayed. :skia:
I was told by DAB that there would be no math here. I feel betrayed. :skia:
It's just a little math. Buck up binky, you'll be ok.
It only happens twice. :leaving:
It only happens twice. :leaving:
Two pi!! :hurray:
Two pi!! :hurray:
Pizza & Pumpkin :hurray:
Cybercowboy
03-14-2015, 8:01am
I'm partial to 2.718. It gets no respect :(
Oh, the base of the natural log gets much respect and in fact shares a special partnership with pi. In fact, many mathematicians think this equation is one of the most beautifully simple yet powerful equations there is:
1 + e^i*pi = 0
In this you have five of the most fundamental math elements beautifully tied together.
1 (one is pretty singular)
e (base of the natural log)
i (sqrt of -1)
pi
0 (zero is essential I think)
So there you go!
almost here on the east coast!! :hurray::hurray: :dance::dance: :sneaks:
Cybercowboy
03-14-2015, 9:06am
Oh, and today is Albert Einstein's birthday!
Oh, and today is Albert Einstein's birthday!
e=mc^2
Cybercowboy
03-14-2015, 9:26am
IT'S PI!
NeedSpeed
03-14-2015, 12:21pm
I actually use it too.
10" pipe is 10-3/4" outside diameter. 10.75" x Pi = 33.77". Therefore, one pass around a 10" pipe is 33.77 inches of weld. A 10" pipe weld is 3-4 passes. That's 135" of weld. Or about 11'.
I like hair pi when laying pipe :dance:
Burro (He/Haw)
03-14-2015, 12:23pm
I like hair pi when laying pipe :dance:
Probably what we call "small bore" in your case. :funnier:
NeedSpeed
03-14-2015, 12:27pm
Probably what we call "small bore" in your case. :funnier:
3.14" in fact :leaving:
NeedSpeed
03-14-2015, 12:28pm
IT'S PI!
I'll have to catch the evening edition, I slept thought the first one. :banghead:
Burro (He/Haw)
03-14-2015, 12:32pm
3.14" in fact :leaving:
Where'd you measure from? Just asking. You know, for a friend. :funniest:
Ol Timer
03-14-2015, 6:41pm
As far as I'm concerned, there is hope for this group. A discussion starting with advanced math ends up in a dick discussion.
All is well with the observable universe. :dance:
CertInsaneC5
03-14-2015, 6:45pm
As far as I'm concerned, there is hope for this group. A discussion starting with advanced math ends up in a dick discussion.
All is well with the observable universe. :dance:
:iagree: :rofl:
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