Why are my questions closed by these users?
What is a "closed" or "duplicate" question?
What does the dot product of two vectors represent? I know how to calculate the dot product of two vectors alright. However, it is not clear to me what, exactly, does the dot product represent.  The product of two numbers, $2$ and $3$, we say that it is $2$ added to itself $3$ times or something like that.  But when it comes to vectors $\vec{a} \cdot \vec{b}$, I'm not sure what to say. "It is $\vec{a}$ added to itself $\vec{b}$ times" which doesn't make much sense to me. NOR Gate is Working Correctly with Vcc Pin Disconnected How to force Windows to rename a file with a special character? I have a song that Windows can't play because there is a question mark in the name of the file.  "Where Have All the Cowboys Gone?.ogg" // as an example   So I try to rename it and Windows complains whether I try it in Explorer or from command prompt.  Error I get when trying to copy, rename, or move is:     The Filename, directory name, or volume label syntax is incorrect   Is there a Windows way to force a rename in this case?   Update  I'll keep an eye on this question, but after 13 answers and many attempts (aside form 3rd party solutions) it seems that Windows can't do this (or at least my windows can't, no short names). So I'm accepting the answer which was my original solution anyway of using Linux. It would be nice to see Windows handle this somehow, so don't stop just because I've accepted this answer, the question still stands! Whitespace Problems With Script and Variables if p is prime then 1920 divides $p^4-10p^2+9$ Are there any films about graphic design? I'm looking for fiction films that are either about graphic design, or have important elements of its history, and I'm a bit stuck.   I'm not trying to find movies that would be inspiring for designers (that would be quite broad and subjective), but movies that touch the subject of design directly. I have a site with Google Maps on most of the pages. When inspecting content keywords in Google Webmaster tools, content keywords identified by Google-bot for the site include "imagery", "sorry" and "here". These turn out to be part of an error message returned by Google Maps: "Sorry, we have no imagery here". I cannot reproduce this error with normal clients, nor does "fetch as Google" show it. The problem is presumably that Google-bot tries to execute some of the Google Maps Javascript but then shoots itself on the foot and records the error message.  A  shows that this problem is endemic to sites across the internet, including Yelp and many others.  I'd like to convince Google that my site is not about imagery and being sorry, but I'd also like to keep the maps in place. I guess one option would be to transition to , but that's not a great alternative.  There's some , no resolution. I recently upgraded my CPU from an Athlon II X2 250 to the Athlon II X4 610E(45W 4 cores -- can't beat the efficiency).  Is an ubuntu reinstall required? Is there a difference between Cursor.Current and this.Cursor (where this is a WinForm) in .Net? I've always used this.Cursor and have had very good luck with it but I've recently started using CodeRush and just embedded some code in a "Wait Cursor" block and CodeRush used the Cursor.Current property. I've seen on the Internet and at work where other programmers have had some problems with the Cursor.Current property. It just got me to wondering if there is a difference in the two. Thanks in advance.  I did a little test. I have two winforms. I click a button on form1, set the Cursor.Current property to Cursors.WaitCursor and then show form2. The cursor doesn't change on either form. It remains Cursors.Default (pointer) cursor.  If I set this.Cursor to Cursors.WaitCursor in the button click event on form1 and show form2, the wait cursor only shows on form1 and the default cursor is on form2 which is expected. So, I still don't know what Cursor.Current does. What documentation does a Mexican citizen need to fly domestically within Mexico? If a Mexican citizen, residing in Mexico, wants to fly domestically, what documents are needed?   Example: Flying from Torreon to Cancun (different states in Mexico) Custom cross-reference formats (e.g. "Equation 1" instead of just "1") I am trying to lock some boxes in a map of mine, and I used this command:   /blockdata 10 4 9 {Lock:Elyiana's Mage Key}   At first it worked, but then when I logged back on the next day it gave me this error message:    Data tag parsing failed: Expected '}' but ''' at: {Lock:Elyiana'&lt;--[HERE]     I don't know why it doesn't like the apostrophe in the key's name. I would change it, but it already worked and locked some other items. My version is 1.12, does anyone have an answer to my problem? Assuming convergence of the following series, find the value of $\sqrt{6+\sqrt{6+\sqrt{6+...}}}$ Assuming convergence of the following series, find the value of $\sqrt{6+\sqrt{6+\sqrt{6+...}}}$  I was advised to proceed with this problem through substitution but that does not seem to help unless I am substituting the wrong parts. If i substitute the $6$, well then i am just stuck with above.   Any ideas on how to proceed. Also, what is the purpose of stating that it is convergent. The Impossible puzzle ("Now I know your product") I am trying to figure out this impossible problem by Martin Gardener and still havent found a suitable solution or link to it     Two mathematicians S and P are discussing two   unknown integers, both greater than 1. S knows only the sum of the   numbers, whereas P knows only their product.:      S: "I see no way you can determine my sum."    P (after a suitable delay): "That didn't help me. I still don't know your sum." S (after   another delay): "Now I know your product." What are the two numbers?   I have seen the answers on the xkcd wiki link for this at  say 13 and 16 and it checks out mathematically but then there are more ambiguous responses and most of the attempts seem brute force rather than logic.  My question is two fold   How to solve this problem logically? Are there more answers then 13,16 or this answer is the only one even as the upper bound k(upper bound on answer) shifts higher I have updated from Windows 7 Ultimate x64 to Windows 10 Pro x64 using Media Creation Tool.  After some weeks when I'm clicking on the start button nothing happens and the whole status bar becomes unresponsive. After trying to restart explorer.exe from Task Manager explorer.exe fails to initialize. It just shows the start button, Cortana and the search bar, TaskViewer (if that's how it is called) and the Action Centre button.  Any ideas?  I tried running:   sfc /scannow and no errors were found chkdsk /f and no errors were found   A full system restart seems to do the trick but after some time like a few hours it stops responding again.  My configuration:   CPU is Intel i5 4690K OC-d to 4.5Ghz GPU is AMD Radeon HD 7750 Saphire 1Gb GDDR5 Edition   EDIT: After some GOOGLE SEARCHING if i try to run from Task Manager C:\Windows i can actually open a window. The start bar isn't responding though and there are still no desktop icons or wallpaper. Presently, how much information can a quantum computer store, in how many qubits? What restrictions are there and how does it vary across realizations (efficiency of data storage, ease of reading and writing, etc)? What's the tax on a hobby orchard? How can I obtain the command line arguments of another process?   Using static functions of the System.Diagnostics.Process class I can obtain a list of running processes, e.g. by name:  Process[] processList = Process.GetProcessesByName(processName);   However, there is no way to access the command line used to start this process. How would one do that? How do I get a list of obsolete packages? I'm trying to figure out a way to get a list of the packages that are no longer available in the repositories that I have enabled. This workstation has been through quite a few versions of Ubuntu and has had many 3rd party repositories added and removed. I'd like to get a list of software that I have from these removed repositories, so I can clean it up or add back the appropriate repositories. I'm trying to understand the use of super(). From the looks of it, both child classes can be created, just fine.   I'm curious to know about the actual difference between the following 2 child classes.  class Base(object):     def __init__(self):         print "Base created"  class ChildA(Base):     def __init__(self):         Base.__init__(self)  class ChildB(Base):     def __init__(self):         super(ChildB, self).__init__()  ChildA()  ChildB()