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"Close enough for government work..."etotheipi said:No need! Just remember the fundamental theorem of Physics,$$\pi \approx e \approx \sqrt{g}$$
The units on this one bother me... And no, before you ask, I never got used to Gaussian units either!etotheipi said:$$\sqrt{g}$$
Tell us about those rare occasions !Filip Larsen said:rarely need more than that as an engineer
BvU said:Tell us about those rare occasions !
Sounds like your like me and you know the button you want is somewhere on the calculator, but you can't find it, so you just use another function. I never, ever, ask for "e", I find "e^{1}" a much easier way to do it.BvU said:I use 2*arccos(0)
I seriously question any circumstance in engineering where you need 18 digits. How accurately do you know the yield strength of the steel your using, the value of the capacitor in your circuit, the fuel flow rate in your engine? Can you really measure your distances in meters to 1/100 the size of a proton?Filip Larsen said:Perhaps https://en.wikipedia.org/wiki/Piphilology has a useful sequence?.
As a young mind I was able to do around 50 decimals if I trained often enough (that was without any particual memo-technique). Now, all those years later, the first 18 has somehow gotten stuck in memory and since I rarely need more than that as an engineer I'm quite happy I put in the effort back then
They got Buzz and Neil to the moon and back. Lots of impressive stuff was built with 3 significant digits, back in the day. Granted not as impressive as what consumers can buy today. No LHC or LIGO in 1970.BvU said:Engineers use slide rules
Just slide on out before you break a rule...DaveE said:Uh oh. I've hijacked anther thread, haven't I? Sorry, I'll shut up now.
DaveE said:I seriously question any circumstance in engineering where you need 18 digits.
Ah ! Figure of speech, not to be taken literallyFilip Larsen said:since I rarely need more than that
No they didn't. There is a good account of the pre-flight computations as well as the real time actions and post-flight analysis at https://history.nasa.gov/afj/index.html.DaveE said:[Slide rules] got Buzz and Neil to the moon and back. Lots of impressive stuff was built with 3 significant digits, back in the day.
etotheipi said:No need! Just remember the fundamental theorem of Physics,$$\pi = e = \sqrt{g}$$
e is the Euler number, the base of the natural logarithmgary350 said:e = energy?
g = gravity?
Pie is a circular dessert, and pi is a mathematical constant that represents the ratio of a circle's circumference to its diameter. Both involve circles, making pie a fun and memorable way to remember pi.
Studies have shown that associating information with a pleasurable experience, such as eating pie, can improve memory retention. By creating a positive association with pi, you are more likely to remember it.
No, any type of pie can help you remember pi. However, some people find it helpful to use a fruit pie, as the number of letters in the name of the fruit can correspond to the digits in pi (e.g. apple pie for 3.14).
Pie is a fun mnemonic device for remembering pi, but it is not a substitute for learning and understanding the concept of pi. It can help you remember the digits in pi, but it is important to also understand what pi represents and how it is used in mathematics.
Yes, there are many other mnemonic devices and tricks that can help you remember pi. Some people use songs, poems, or visual aids to remember pi. The key is to find a method that works for you and helps you remember pi accurately.