How many rings that have special effects can one character wear at a time while still having all of the special effects
Is there a limit to the number of magic rings a character can wear on one hand?
In the context of boiling water for pasta or other purposes, all over the Internet the advise is oft-repeated that salt should not be added to the water when it is cold in order to prevent damage to the pot such as pitting over long term use.  The reasoning is that the salt stays on the bottom of the pot for longer without dissolving, and has a chance to interact with the surface metal.  Is there any objective evidence--preferably scientifically based--that this phenomenon actually occurs in practical kitchen-type conditions, or is this another piece of common wisdom that is often shared but not backed by evidence, much like  common wisdom that it is necessary to use very large volumes of water to cook pasta? Does a car use friction to move? When a car's engine injects fuel into the cylinder chambers, the reaction creates a force that generates rotational momentum to the shaft and over the transmission, it translates that power to the wheels, right?  But, something's bothering me, how does the car actually move, is it dependent on the force of friction? Wheels have a contact with the road in one exact point and when the drive gets to rotate them, a force is exerted on the road in the direction of movement and there is friction that is counteracting it.  Is the key to get a car properly moving to have the drive force equal or less than the force of friction to keep that point locked to the ground and use the rolling of the wheel for translational displacement ie. moving forward? If it's bigger than the force of friction, that would cause the wheels to spin in place?  Am I completely off or am I getting something right? If there's a knowledgeable person on this topic, I'd greatly appreciate some insight, perhaps even a bigger response with some basic vehicle physics. Guest (not logged in) users can only sort questions with specific tag by newest I think this is platform wide (all SE sites).   Logout Choose a tag, eg.  on SO Try to sort questions by something other than newest   No matter what sorting is chosen, questions are sorted by newest How to use java.util.Scanner to correctly read user input from System.in and act on it? Will wolves attack and kill ocelots in Minecraft? I know they kill sheep. I just don't want my cats being eaten. Handling multiple regex matches in Ampscript Given this string:  SET @text = "&lt;a href=""https://salesforce.stackexchange.com""target=""_blank""&gt;Salesforce&lt;/a&gt; &lt;a href=""https://stackoverflow.com"" target=""_blank""&gt;Everything else&lt;/a&gt;"   And this function:  SET @matching = '\s+(?:[^&gt;]*?\s+)?href="([^"]*)"' SET @output = RegExMatch(@text, @matching, 1)   How can I manage to find and print an arbitrary number of matches in my string? E.g. in above example, I would like to present e.g. a rowset with each URL in each row. How do I find (or exclude) all directories and sub-directories matching a certain pattern (in Linux)? Is it possible to extend a tourist Schengen visa (12 more days)? Possible Duplicate:          I sometimes work outside and are using a 3G usb connection with quite a limited data allowance.  I want some fast and easy way to temporary block all incoming and outgoing traffic in windows firewall except for chrome to be sure that Dropbox or something else is not using up my data.  I've tried to set Windows Firewall Properties to "Block" which gives "Outgoing/Incoming connections that do not match a rule are blocked".  Problem: There are many allow-rules like Dropbox that would "override" the block. And I don't want to disable all rules and then enable them, since there are some that I want disabled even when I get to the office...  Any suggestions?  Thanks! Inverse of this $3\times 3$ matrix using the Cayley–Hamilton theorem Find the inverse of the matrix $$\begin{pmatrix} -1 &amp; 2&amp; 0 \\ 1&amp; 1 &amp;0 \\ 2 &amp; -1&amp; 2 \end{pmatrix}$$ using the Cayley–Hamilton theorem.  Thanks! "Stack Overflow" showing up on hamburger menu for all sites to link to /questions Why does it say "Stack Overflow" instead of the site name? Find the cardinality of the quotient of $\mathbb R$ in respect to R R is an equivalence relation defined as $xRy \Leftrightarrow a - b$ is an integer.  What is the cardinality of the quotient of $\mathbb R$ in respect to R? How would you prove it?  I thought about a bijection between $[0,1)$ to the quotient of $\mathbb R$ in respect to R, but can't figure out to prove it formally. How can I get sql string, generated by Linq2SQL ORM? Is it standard to say $-i \log(-1)$ is $\pi$? I typed $\pi$ into Wolfram Alpha and in the short list of definitions there appeared  $$ \pi = -i \log(-1)$$  which really bothered me. Multiplying on both sides by $2i$:  $$ 2\pi i = 2 \log(-1) = \log(-1)^2 = \log 1= 0$$  which is clearly false.  I guess my error is $\log 1 = 0$ when $\log$ is complex-valued.  I need to use $1 = e^{2 \pi i}$ instead.  So my question: is it correct for WA to say $\pi = -i \log(-1)$?  Or should be they specifying "which" $-1$ they mean?  Clearly $ -1 = e^{i \pi}$ is the "correct" value of $-1$ here. I need to do a lot of cleaning in my Virtual Machine whose Operating System is Ubuntu.  Normally in Windows, there is this kind of directory that contain temporary files and that should be cleaned :  C:\Documents and Settings\Administrator\Local Settings\Temp   Does it exist such a directory in Ubuntu? If yes, what is it?  Thank you a lot. Find the Values of $p$ and $q$ such that $\int_0^{\infty} x^p\ln(1+x)^q dx$ Converges or Diverges. The question is to find the value values of $p$ and $q$ such that the improper integral converges or diverges.  My friend indeed found some values of $p$ and $q$ such that it converges, but after many trials, I am still getting divergent for all values.  Via L'Hospital, we have the following:  $$\lim_{x \to 0} x^c\ln(1+x)^q = \infty \space \text{when} \space  c &lt; 0$$ $$\lim_{x \to 0} x^c\ln(1+x)^q = 0 \space \text{when} \space  c &gt; 0$$ $$\lim_{x \to \infty} x^c\ln(1+x)^q = \infty \space \text{when} \space  c &gt; 0$$ $$\lim_{x \to \infty} x^c\ln(1+x)^q = 0 \space \text{when} \space  c &lt; 0$$  Thus, $$\int_1^{\infty} x^p\ln(1+x)^q dx = \int_1^{\infty} x^{p-c}x^c\ln(1+x)^q dx &gt; \int_1^{\infty} x^{p-c} dx$$ which diverges when $p &gt; -1$.  Here, we set $c = \frac{1}{2}(p+1) &gt; 0$.  On the other hand, $$\int_0^1 x^p\ln(1+x)^q dx = \int_0^1 x^{p-c}x^c\ln(1+x)^q dx &gt; \int_0^1 x^{p-c} dx$$ which diverges when $p &lt; -1$.  Here, we set $c = \frac{1}{2}(p+1) &lt; 0$.  Thus, the integral diverges whenever $p \ne –1$.  Then, let $p = -1$.  $$\int_0^{\infty} \frac{1}{x}\ln(1+x)^q dx = \int_0^1 \frac{1}{x}\ln(1+x)^q dx + \int_1^{\infty} \frac{1}{x}\ln(1+x)^q dx $$ $$ \ge \int_0^1 \frac{1}{x+1}\ln(1+x)^q dx + \int_1^{\infty} \frac{1}{x+1}\ln(1+x)^q dx $$  The first summand diverges when $q &lt; -1$ and the second diverges when $q &gt; -1$.  Finally, let $ p = -1$ and $q = -1$.  The integral $\int_0^{\infty} \frac{1}{x\ln(1+x)} dx ≥ \int_0^{\infty} \frac{1}{(x+1)\ln(1+x)} dx$ diverges on both ends.  Did I make a mistake? Is it correct to say "I wrote him" or "I wrote to him"?  My Mother was a stickler for English grammar and would say "I wrote your Uncle..." rather than "I wrote to your Uncle..." Why is the detection of gravitational waves so significant? LIGO has announced the detection of gravitational waves on 11 Feb, 2016. I was wondering why the detection of gravitational waves was so significant?   I know it is another confirmation of general relativity (GR), but I thought we had already confirmed GR beyond much doubt. What extra stuff would finding gravitational waves teach us? Is the detection of gravitational waves significant in and of itself, or is there data which can be extracted from the waves which will be more useful? In Harry Potter and the Prisoner of Azkaban, Harry sneaks into The Three Broomsticks and overhears Madam Rosmerta, the Minister for Magic, and several Hogwarts teachers discuss his parents' death and the fact that the Potters were under the protection of the Fidelius Charm. Professor Flitwick explains the charm:     ‘An immensely complex spell,’ he said squeakily, ‘involving the magical concealment of a secret inside a single, living soul. The information is hidden inside the chosen person, or Secret-Keeper, and is henceforth impossible to find – unless, of course, the Secret-Keeper chooses to divulge it. As long as the Secret-Keeper refused to speak, You-Know-Who could search the village where Lily and James were staying for years and never find them, not even if he had his nose pressed against their sitting-room window!’   Prisoner of Azkaban - pages 152-153 - Bloomsbury - chapter 10, The Marauders Map   In Harry Potter and the Deathly Hallows, once Ron returns to Harry and Hermione after his and Harry's fight weeks earlier, he tells Harry and Hermione about the Taboo:     ‘NO!’ roared Ron, causing Harry to jump into the hedge and Hermione (nose buried in a book at the tent entrance) to scowl over at them. ‘Sorry,’ said Ron, wrenching Harry back out of the brambles, ‘but the name’s been jinxed, Harry, that’s how they track people! Using his name breaks protective enchantments, it causes some kind of magical disturbance – it’s how they found us in Tottenham Court Road!’   ‘Because we used his name?’   ‘Exactly! You’ve got to give them credit, it makes sense. It was only people who were serious about standing up to him, like Dumbledore, who ever dared use it. Now they’ve put a Taboo on it, anyone who says it is trackable – quick and easy way to find Order members! They nearly got Kingsley –’   Deathly Hallows - page 316 - Bloomsbury - chapter 20, Xenophilius Lovegood   So in hindsight the trio understands that it was the Taboo that caused the Death Eaters to find them at Tottenham Court Road, and then later, of course, they're caught by Snatchers because Harry says "Voldemort" out loud. However, the trio says "Voldemort" numerous times while they're staying at Grimmauld Place and Death Eaters appear and stake the place out (granted, it could be that the Death Eaters simply knew that Harry had inherited Grimmauld Place from Sirius after the Ministry examined Sirius's will). They cannot get inside the house, though. I'm completely unclear as to the status of Grimmauld Place and the Fidelius Charm -- the house was under the charm, but the Secret Keeper (Dumbledore) had died. Nevertheless, like eleventy-one people were privy to the secret by the time of Dumbledore's death, and I have never found a satisfactory answer (to me) to exactly how the Fidelius Charm works.   Would Voldemort's Taboo spell be able to trump the Fidelius Charm?  &#9733; I'm looking for a canon-based answer (Harry Potter novels, the three supplemental books, JKR interviews, and Pottermore) and do not prefer an answer from the HP Wikia or the Wikipedia. How to find the URLs accessed by iOS Apps?