Would the speed of 'push' be equal to the speed of sound?
Is it possible for information (like 1 and 0s) to be transmitted faster than light?   For instance, take a rigid pole of several AU in length. Now say you have a person on each end, and one of them starts pulling and pushing on his/her end.   The person on the opposite end should receive the pushes and pulls instantaneously as no particle is making the full journey.  Would this actually work?
How to create a timeline with LaTeX? sudo apt upgrade error 18.04 (Broken Packages) I have 5 tables and a section after them. After creation of an output file I have two tables on one page, then a section and last 3 tables on next page.  What I want to achieve is to put tables and section below them.  \begin{table}[ht]\footnotesize \centering \begin{tabular}{|ll|} ...... \end{tabular} \label{tab:result} \end{table}  \section{Section below tables} I found two things peculiar in the common style of macro definitions:   Ending lines in macro definitions with '%'; Not wrapping a macro name in braces.   Example:  \newcommand\examplemacro{%     \somecommand%     \othercommand% }   Being a software engineer first and a LaTeX user a distant second, I would expect:  \newcommand{\examplemacro}{     \somecommand{}     \othercommand{} }   Is there a reason for doing it the former way, or is it merely a matter of habit? Negative values for AICc (corrected Akaike Information Criterion) I have calculated AIC and AICc to compare two general linear mixed models; The AICs are positive with model 1 having a lower AIC than model 2.  However, the values for AICc are both negative (model 1 is still &lt; model 2).  Is it valid to use and compare negative AICc values? Not sure if this option ever existed, but the new QGIS version hides a lot of things somewhere else and this seems so simple that I'm kind of convinced it was possible to do this before. I have quite a large data set with ship tracks. I now want to analyse individual ship tracks (made from point layer with  Plugin). However, it is so crowded that it is hard to look at individual tracks. I don't want to save each single track as a new layer, so I wonder if it is possible to select one track in the Attribute table and display only that one on the map/hide the others? Can Freestyle draw lines when an object is behind a transparent plane? Can Freestyle draw lines when an object is behind a transparent plane (or any other transparent object)? The render below shows the issue, the freestyle lines that should be drawn on lower arm and hand don't get drawn. How to get a toddler to start chewing and eating solids? My son is 18 months old and still doesn't want to chew and eat solid foods. We have to blend soups and other food into purée for him to accept it. If there is even a slight solid, he will automatically push it out of his mouth with his tongue.  I have had a breakthrough with breakfast where I don't blend as much and leave it a little chunky. He ate it but still pushed chunks of soft banana that were bigger out.  Some of my friends have kids that are 4-5 months younger, who are eating chicken cutlets.  Any ideas or proven methods for getting a child to start eating solids? I accidentally killed a noble, now every guard wants to kill me. Is there any way I can get rid of the bounty? I have a Multisite Wordpress installation with 7 different blogs. I want to show an aggregate of the summaries of posts from those 7 blogs in the main blog. Do you know a good way to do this? notation of distribution I have a question:      Does  $$N(0, x)$$ mean a normal distribution with mean $0$ and variance $x$? Or standard deviation $x$?   The notation seems ambiguous sometimes. Selecting text in profile activity comments causes unexpected clipping It isn't any of the words on this  and I believe it started with the letter 'e' (though please offer your word even if it doesn't).  Example sentence: Because he researched what he had heard from his friends, he was able to refute many of their _________________.  Factoid seems to be the closest one, but the word I am looking for only refers to a belief that is false. If $\gcd(a,b)=1$, $\gcd(a,y)=1$ and $\gcd(b,x)=1$ then prove that $ax+by$ is prime to $ab$.  I tried assuming Diophantine Equations for all the relations and representing everything in terms of $a$, but that didn't lead me anywhere. There must be an intuitive and elegant approach right? Comments saying "thank you" remind OP to accept answer Subspaces of separable normed spaces Let $X$ be a separable normed space. Is it true that every subspace is separable? If it was Hilbert space I would take the dense set and then their projections.  It sounds trivial but I cannot prove or disprove it...  Thank you. Is my way of solving and my answer correct?  Let $f(x)=x+\frac{x^2}{2}+\frac{x^3}{3}+\frac{x^4}{4}+\frac{x^5}{5}$   And $g(x)=f^{-1}(x)$  Find $g'''(0)$  My attempt:  We know that $g'(x)=\frac{1}{f'(g(x))}$  $f'(x)=1+x+x^2+x^3+x^4=\frac{x^5-1}{x-1}$  $f'(g(x))=\frac{(g(x))^5-1}{(g(x))-1}$  $\Rightarrow g'(x)=\frac{(g(x))-1}{(g(x))^5-1}$  $\Rightarrow g'(x)[(g(x))^5-1]=g(x)-1$  Similarly differentiating again,  $\Rightarrow g'(x)[5(g(x))^4]+[(g(x))^5-1]g''(x)=g'(x)$  Similarly differentiating again,  $\Rightarrow g'(x)[20(g(x))^3g'(x)]+[5(g(x))^4]g''(x)+[(g(x))^5-1]g'''(x)+g''(x)[5(g(x))^4]=g''(x)$  Putting $x=0$,  $g(0)=f^{-1}(0)=0$  $g'(0)=\frac{1}{f'(g(0))}=\frac{1}{f'(0)}=1$  similarly,$g''(0)=-1$  $\Rightarrow g'''(0)=1$ The "I Get It" Reputation Problem I wrote a question about blocking certain characters in passwords. It became tremendously unpopular, and it seemed like everyone wanted to rain on my parade every day.  Eventually, I "got it," agreed completely with what people were saying to me, and just wanted to withdraw my question so that my reputation didn't slide even further downhill.  Unfortunately, the system is designed such that I can't withdraw my question or redeem myself. Instead, I just get daily reputation attacks. That's a terrible system, and it needs to be changed. Selenium python drop down menu select Could an argument with false Premises and a true Conclusion be logically valid?