What is the Law of Length and its significance?

  • Thread starter Thread starter 29 clicks
  • Start date Start date
  • Tags Tags
    Law Length
AI Thread Summary
The discussion centers on the "Law of Length," which participants find difficult to define or locate in resources. One suggestion links it to the concept of elasticity in technology, where standardized lengths can be extended. Another interpretation relates to the brevity of news reports, emphasizing concise communication. A more scientific perspective connects the law to the relationship between a pendulum's period and its length, suggesting a proportionality that is not commonly referred to as a "law." Overall, the term appears to be ambiguous and may not have a widely accepted definition.
29 clicks
Messages
15
Reaction score
0
Can someone explain to me what Law of Length because I have tried to look for it in my textbook and the Internet but have been unsuccessful, so if someone can give me a link to finding what Law of Length is or tell me what it is, it would really help.
 
Physics news on Phys.org
"Law of Length"?? Never heard of it. Where did you hear the phrase?

I just googled on "Law of Length" and now I know too much!

Here is one possibility:
http://www.pcmech.com/show/editorial/173/
which says
"Law III: Law of Length/Duration Elasticity
Standardized lengths for things like cables can be extended by the sheer presence of a tech. Ex: in the presence of a tech, 18" IDE cables can reach lengths of at least 21", if not more. Also, routines with standard time lengths, like a boot, can be accelerated or delayed as necessary by the will of the tech. "

Hmmm, I think that's a joke!

Another:
http://www.aapspharmaceutica.com/about/press/aapsexpertsdatabase/index.asp
which says:
"Law of Length
News reports are usually brief. Keep your responses short and to the point."
Not sure whether that's a joke or not but not likely to be what you are looking for!

I think it most likely what you are looking for is one of these:
http://www.cic.nic.in/cicmanipur/html/hr_c&syll_phy.asp
or
http://www.msu.edu/user/sellmerr/measuring_time_accurately_and_na.htm
which assert that the period of a pendulum is proportional to the square root of the length of the pendulum. Never thought of calling that a "law" myself!
 
Last edited by a moderator:
I tried to combine those 2 formulas but it didn't work. I tried using another case where there are 2 red balls and 2 blue balls only so when combining the formula I got ##\frac{(4-1)!}{2!2!}=\frac{3}{2}## which does not make sense. Is there any formula to calculate cyclic permutation of identical objects or I have to do it by listing all the possibilities? Thanks
Essentially I just have this problem that I'm stuck on, on a sheet about complex numbers: Show that, for ##|r|<1,## $$1+r\cos(x)+r^2\cos(2x)+r^3\cos(3x)...=\frac{1-r\cos(x)}{1-2r\cos(x)+r^2}$$ My first thought was to express it as a geometric series, where the real part of the sum of the series would be the series you see above: $$1+re^{ix}+r^2e^{2ix}+r^3e^{3ix}...$$ The sum of this series is just: $$\frac{(re^{ix})^n-1}{re^{ix} - 1}$$ I'm having some trouble trying to figure out what to...
Back
Top