- On A basic 4’X 8’ (22" r.) loop has anyone figured out the actual length of track being travelled? CC., not OD. or ID. 2. I think I remember ‘Pie-R-squared’ was AREA. What was CIRCUMFERENCE.? Dumb and getting dumber, Plus I don’t have the PIE cymbal - or is it 'symble? - on my computer. Frankly, when it comes ‘pie’ I prefer Pecan.
Hi Don! Darn I thought you knew everything! [:D] If memory serves me right Circumference is πD (Pi times Diameter). It can also be figured as 2πR.
Oh, and a cymbal is half an orchestral instrument that from time to time goes CRASH! I think you meant Symbol…[;)]
To respond in order of importance:
Pecan is my favorite followed by cherry.
Pi (from the old engineer’s football cheer) is 3.14159… (don’t remember the rest, 3.14 is plenty “good enough”, I’ve been guilty of rounding to 3 when doing calcs in my head!)
Formula for cirucmference is 2Piradius (2PiR). Circumference of 22" radius circle = 23.1422 = 138 inches. Add 2 * 48 inches (straight sections on 4x8) = 234 inches total or 19.5ft.
Fred W
I’m most partial to sugar cream myself, but I really only like 2 kinds of pie, hot and cold!
The formaulas you have are right, both 2 x pi x radius or pi x diameter = circumference of a circle. If you are trying to figure an oval with circular ends, then add the lengths of the 2 straight sections to the circumference of the circle to get your actual length. Good luck!
The formula for the circumference of a circle is 2 * Pi * R where R= radius. The circumference of a 22" curve is 138.12 inches (rounded to nearest 1/100 inch). The diameter of a 22" radius circle is 44", which will fit on a 4x8 leaving 2" (from track center) to the edge of the table on either side. 8’ = 96 inches. Subtracting 2" from each end for clearance allows 92" for track. Subtract the 44" for the curve leaves 48" allowed for tangent track. This can be done with 5 9" pieces of straight on each side plus 1 3" piece on each side.
Putting it all together, you have 48" + 48" for the 2 tangent sides plus 138" for the curve. this creates a length of 234" or 19 feet 6 inches.
Oh yeah, curve radius is figured from the center of the track.
Now for your next exercise, what’s the volume of a cylinder 3 feet in diameter and 8 feet high?
Give your answer both in cubic feet and liters (hint: a liter is 1000 cubic centimeters).[:D]
Andre
And when you have that figured, calculate the pressure on a 1 square foot plate on the wet side of a dam, 300 feet below the surface.
And then use the Poisson Distribution to calculate the probability density function of finding anywhere from no fish to 20 fish with-in ten feet either side of that depth out to a distance of 10 yards from the face of the dam if 3,400 fish are randomly distributed in the lake. The lake has a total volume of 4.6 billion liters.
I don’t know if this will help, but 4.6 billion liters is equal to 3729.28 acre feet so there’s roughly .911 fish per acre foot.
Andre
I Thanks to those who aswered (and some of you that didn’t). “calculate the pressure on a 1 square foot plate on the wet side of a dam, 300 feet below the surface” Chip Mouse - Glad your still with us - I think. You probably want ‘Specific Gravity’ next? Frankly my dear, I don’t give a dam. “A cymbal is half an orchestral instrument that from time to time goes CRASH! I think you meant Symbol…” - Ray And here I thought "Symbol’ was the name of Patti Hearst’s Lebanese army. I won’t ask you the circumference if the orchestra or the maestro’s er- baton. Selecror and Adre C. “And then use the Poisson Distribution to calculate the probability density function of finding anywhere from no fish to 20 fish with-in ten feet either side …(etc.)” Too ‘fishy’ for me to ‘tackle’ (sorry) Fred W - You are always RIGHT. “Give your answer both in cubic feet and liters (hint: a liter is 1000 cubic centimeters”. I’ll drink to that … Cheers
Pi are not square…pi are round…
Pi should always be round, never square, unless it is deep dish or Pizza. No other exceptions!!
How many times did we sit in class and say “I will never use this stuff”, only to have a hobby question come along to challenge us beyond that very “practical” application today! I wonder if the curiosity has to precede the learning readiness? A better question is the sucess of oriental Americans in the sciences including math, does it come from culture or from the genes?
Pecan pie is still my all time favorite, but a good apple will make an excellent close to a meal!
Will
There are no fish within that area on the face side of the dam. All of the fish are in the water (on the back side of the dam).
How do you put an elephant in a refrigerator?
At my favorite local impoundment facility the fish answer would be, “You’ve got to be kidding!” The concrete between there and the water is a couple of hundred feet thick.
Of course, the lake volume is a little low, too, even at its present meager level
(The lake is Mead, and the dam is Hoover.)
As for stowing an elephant, all you need is a REALLY BIG refrigerator.
Chuck
“How do you put an elephant in a refrigerator?” tusk tusk. OK, I’ll bite. How DOES one “put an elepfant in a refrigerator?”
OK; open door,
put elephant in,
close door…
I’m not really sure if the light will go out or not, maybe ask the elephant?
ROFLMAO! This has turned out to be the best thread around here in months!
BTW, for those of you that have an elephant in your refrigerator, you should cook it soon as an elephant only keeps for a few days. Therefore I am enclosing one of my favorite Boy Scout recipes for Elephant Stew. I am confident that Don can figure out the circumference of the pot you will need for this by now.
Elephant Stew
1 Elephant 2 Rabbits (optional)
Carrots Salt and Pepper
Celery Brown Gravy
Onions
Cut Elephant into small bite size pieces. (this will take about 2 months.) Add enough brown gravy to cover. Cook over kerosene fire for about 4 weeks at 465 degrees. On the last day lower heat and add chopped up vegetables and simmer for 10 more hours. This will feed about 3,800 people. If more are expected the 2 rabbits may be added, but only if necessary as most people don’t like to find hare in their stew!
Something’s missing…I know, bay leaves. They’re a must for hefelump stew.[:D]
As far as pie, I only like it either when I’m by myself or with somebody. Pecan is my favorite.
As far as the other wild geometric calculations, don’t forget to convert to HO scale.
Brad
Absolutely! Actually I like to put in a touch of fresh Basil as well.
The follow up to this is “How do you put a hippopotamus in the refrigerator?”