Bad effects of coiling electrical cables
Why is it dangerous use a coiled extension cord
Better extensible arrows How do we prove that this set is not manifold? "I think him to be about 50" or "I think he is about 50"? I have two options. Which one is correct?      a) I think him to be about 50.   b) I think he is about 50.   If both are correct, should I avoid one or the other? How do you remove Nvidia's proprietary drivers? I always seem to have grief with Nvidia drivers and have often had to re-install Ubuntu: is there a better way to remove them? When I first installed the drivers, the display came up on 640 by 480.  I managed to set 2 screens to 1024 by 780 which was usable, but then Ubuntu recommended installing proprietary drivers (nvidia-current-updates 295.40-ubuntu1). After doing this and re-booting it shows LAPTOP and offers only 640 by 480 on a single screen.   Is there any way to revert to the original driver? Is there any way to find out if the new drivers work before installing them? - For years I have been hoping that it would be all fixed in the latest release… I always seem to fall for this! How can I add custom '.desktop' application launchers to Ubuntu Dock? I have made .desktop files for Ubuntu 16.04 to access my Google Chrome profiles, but once I upgraded to Ubuntu 17.10 (it worked up to Ubuntu 17.04) they got removed from the dock and I can't pin them back. Sample File: #!/usr/bin/env xdg-open  [Desktop Entry] Version=1.0 Type=Application Terminal=false Icon[en_US]=google-chrome Name[en_US]=Google Chrome Exec=google-chrome --profile-directory=Default Comment[en_US]=Chrome Name=Google Chrome Comment=Chrome Browser Icon=google-chrome Categories=Browser;Internet; How to combine low sample renders? The grammaticality of "that don't impress me much" I'd like to know how the sentence "That don't impress me much" sounds to a native English speaker.  The phrase is the title of a song by Shania Twain, and to my eyes it contains a clear error. It is obviously intended, and I want to know what was the effect that the author wanted to obtain.  Other examples that come to mind:   “She's got a ticket to ride, but she don't care” — The Beatles “My love don't cost a thing” — Jennifer Lopez “It don't matter” — Akon “She don't care about me” — heard in the Lost series “It Don't Mean a Thing” — a jazz album title “The Sun Don't Lie” — another album title For $x$ and $\lambda$ complex, if $|x| \gt \frac{1}{2} + \sqrt{\frac{5}{4} + |\lambda|}$ then $|x^2+\lambda| \gt |x| +1$ How to get rid of the smell from the fridge? Algorithms for computing multiplicative order modulo $n$ I'm confused with using single or double brackets. Look at this code:  dir="/home/mazimi/VirtualBox VMs"  if [[ -d ${dir} ]]; then     echo "yep" fi   It works perfectly although the string contains a space. But when I change it to single bracket:  dir="/home/mazimi/VirtualBox VMs"  if [ -d ${dir} ]; then     echo "yep" fi   It says:  ./script.sh: line 5: [: /home/mazimi/VirtualBox: binary operator expected   When I change it to:  dir="/home/mazimi/VirtualBox VMs"  if [ -d "${dir}" ]; then     echo "yep" fi   It works fine. Can someone explain what is happening? When should I assign double quotes around variables like "${var}" to prevent problems caused by spaces? Why am I getting no power when I pedal? ceiling fan from a switch with only black and red wires? The current switch controls an outlet in the corner of the room for a lamp. I pulled it out and noticed three sets of individual wires: two set of wires coming up into the box from the bottom, and one set with a red wire coming down into box.  All the white and grounding wires are capped.  Also all the black wires are capped; one set I’m assuming is the hot since I see it contains a red wire. On the back of the switch, the top two ports have black wires and the bottom right has the one red wire.  There are two black pigtail wires coming off the black capped wires. I tried to connect a separate switch to control a ceiling fan with remote. I ran new wire making the old switch box into a two switch. I ran 14/2 gauge wire to ceiling for fan / light remote combo. Fan didn’t work after multiple re-wiring  combinations. The breaker did pop and half click when it popped. Then I thought to re-wire the ceiling fan wires as if I was going to make it into outlet only and use a tester to indicate an open ground, or a wiring error but the two light on tester are both orange indicating correct wiring. I heard that sometimes the ceiling fan remote transformer goes bad. Should I check batteries and/or unit placement? I’m really confused at this point why the light is not working at least with remote after follow wiring installation instructions that were included with the fan. I think it’s my wiring with the switch. The way I left the wiring is that it has constant power. As if we’re a outlet the current switch does not turn it off. Number of non decreasing sequences of length $M$ How many non decreasing sequences are there of length $M$, provided the number in the sequences are allowed from $1,2,3,...,N$? Why can't you add attributes to object in python? Display maximum possible count of sites in footer Are there good alternatives to "making the best of a bad situation?" Life is full of adversity, and people facing challenging life circumstances have to find a way to cope. I'm interested in single words, phrases, or idioms that capture coping strategies. For example:     Jane's job was absurdly repetitive and oppressive, but for her family, she tried to make the best of a bad situation.   Are there good alternatives to the coping strategy of making the best of bad situation?   Clarification: I am looking for alternatives, especially idioms, that don't involve words like good and bad. I want a to be rounded to 13.95.  &gt;&gt;&gt; a 13.949999999999999 &gt;&gt;&gt; round(a, 2) 13.949999999999999   The  function does not work the way I expected. The Medibuntu Project has come to an end - what do I do now? We all know that speed of gravitational waves (GW) and that of light in space are exactly the same (= $c$).  We also know that space is medium for GW.   Does that mean space is also the medium for light?  Because both of them are waves, and speed of a wave is property of the medium.   Is there any other way to justify the identical speed of the two?