Table Definition and 927 Threads

Taking a regular expression and converting it to a DFA with transition table, can you go backwards? I.e. take one of the rows of the table and determine what input string would be accepted for that row?

Hi. Why do some countries use different names for the elements instead of their original names as indicated by their symbol? Like Na(natriu) is called sodium, Au(aur) is gold, Fe(fier) is iron, Cu(cupru) is copper, Ag(argint) is silver, Pb(plumb) is lead. I'm from a Latin/francophone country and...

For particle physics research reference and education purposes, it's often convenient to have comprehensive particle scattering tables and Feynman diagrams at hand for analysis. May I ask whether there is a web site, app, or ebook that dynamically generates comprehensive scattering tables for...

Amoung three elements F,CL,Br which is more reactive? I guessed it to be bromine because it has three shells and hence when we go down the group on the basis of their shells bromine will easily lose electrons. But the book says it is fluorine since it can easily gain electrons.And how can that...

These noble gases do not react with hydrogen or oxygen.but Mendeleev basically classified by observing their reactions with hydrogen or oxygen. Or were these gases fit according to their atomic mass? If so,how did he find it's atomic mass without knowing it's reactivity?

Is there a way to create a grid here on PF that has square elements? I ask because I'm yearning to make a post that will require a Cayley table.

Hi All, Just curious as to what those with experience in creating databases believe is the best method when renaming databases: using Apex SQL , which (supposedly) automatically checks for dependencies or just sitting down , looking at the dependencies and doing the changes one by one as needed...

How do I draw this table on $\LaTeX$? \begin{aligned} \begin{array}{cc|c|c|c|} * && e & r & r^2& r^3& r^4& r^5& f& rf& r^2f& r^3f& r^{4}f& r^{5}f\\ \\ \hline e && e & r & r^2& r^3& r^4& r^5& f& rf& r^2f& r^3f& r^{4}f& r^{5}f \\ \hline r && r & r^2 & r^3& r^4& r^5& f& rf& r^2f& r^3f&...

This is an attempt to create the Cayley table for dihedral group $D_6$: $$\begin{aligned} \begin{array}{cc|c|c|c|} * && e & r & r^2& r^3& r^4& r^5& f& rf& r^2f& r^3f& r^{4}f& r^{5}f\\ \\ \hline e && e & r & r^2& r^3& r^4& r^5& f& rf& r^2f& r^3f& r^{4}f& r^{5}f \\ \hline r && r & r^2 &...

Homework Statement (i) An element that has a molecule which contains exactly four atoms. (ii) An element that reacts with water to give a solution that can behave as an oxidising agent. Homework EquationsThe Attempt at a Solution (i) Shouldn't it be boron? Boron forms BF3 which has four...

Hello, I am writing a program for a two dimensional look up table. The idea is that the user will enter values for x and y and the program will look up the corresponding output value from the table. For example, consider the table shown below. For this table, if the user enters x = 2 and y...

Hey! :o Could you give me a hint how we can find the Cayley table of a groupoid? For example for the groupoid $(2^{\{a,b\}},\setminus )\times (\{0,1\},\min )$. (Wondering) ( $\setminus$ means the set difference )

Homework Statement The question I'm asking about is number two. Should've made it clearer. Homework Equations N/A The Attempt at a Solution My proof table, I'm not sure but it seems that PΞQ is not true.

http://www.iupac.org/news/news-detail/article/discovery-and-assignment-of-elements-with-atomic-numbers-113-115-117-and-118.html

Hi again, just curious as to whether it is possible to use DDL (Data definition, i.e., non-GUI ); more specifically to add something to the usual create table statements to express the relation between tables, i.e., these tables being either in 1:1, M:1 or M:N relation (so that a new, bridge...

How would I use a truth table to show that the statement p v (q ^ r) is equivalent to (p v q) ^ (p v r) or design a venn diagram for this. and show that this statement is not equivalent to (p v q) ^ r.

Hi, All, I am trying to figure out the syntax for doing joins between subsets of the same table. I have: Employee ( EmpId PK , EmpFirst, EmpLast, EmpMid, DateHired, SSN, DateBirth, Gender, PhoneNum, ReportsTo) And I want to find , for each employee, the person they report to. So I am...

Hi all, I am learning DDL ( as opposed to GUI ) table design in MSSL2014. EDIT I am given a table printout and I want as an output the(a) DDL code that would output the given table. Sorry, I don't have a scanner nor the original file in my PC, I have a table diagram in a piece of paper. I...

Homework Statement A stick of length L and mass m lies on a frictionless table.A force parallel to the table top, \vec{F} ,is applied to one end of the stick for a very short time \int F \, dt=\vec{I},the"impulse".Choose a convenient set of two generalized coordinates.Interms of your choices of...

I don't understand the second row of the truth table. If A is 0 and B is also 0 how is there a carry of 1 and a sum of 1. 0+0=0

Just couldn't find help with this anywhere but Using the desmos graphing calculator using the table feature I wanted to plot the points every $\frac{\pi}{12}$ $0<\theta<2\pi$ For $r=-2-3\sin(\theta)$ On a polar coordinate graph

(( X xor Y ) xor Z ) xor T I hope the truth table is correct. I'm not sure, because of the T. T is always 1, right? X Y Z - (( X xor Y ) xor Z ) xor T 111 - 0 110 - 1 101 - 1 100 - 0 011 - 1 010 - 0 001 -...

Hey guys we say that when in periodic table we go from left to right atomic size decreases because of increase in nuclear charge in the same shell but my question is that the electron to proton ratio is 1:1 then how nuclear charge is increased. Some say nuclear charge is concentrated but my...

Homework Statement Homework Equations n/a The Attempt at a Solution I understand how to read the truth table. I understand that A, B, C, D are the inputs where 10 possible inputs are shown. However, with little to no sources available, I am lost on behalf of how this image came about to...

Homework Statement A .5 kg block of cheese sits on a level table. The coefficient of static friction is .60. Three strings are tied together in a knot at a point, K. One string is tied to the cheese, the other on a wall at a 30 degree angle, and in the middle of those two strings a mouse hangs...

Homework Statement Newton's third law of motion is often summarised as 'Every action (force) has an equal and opposite reaction'. A book rests on a table. If the weight of the book is the 'action' force, what is the 'reaction' force? A the pull of the book on the Earth B the pull of...

A rock with a weight of 10 N is resting on a table. A student makes a number of statements about this situation, are they right or wrong? 1. "The weight of the rock is a force of 10 N by gravity in the downward direction" I don't see anything wrong with this. 2. "The reaction force to this...

Homework Statement "Fill in the empty columns of the following table" Table is in the thumbnail Homework Equations work = force / distance power = work / time Y = E * c -Y is the yearly running cost -E is the EnerGuide energy rating per year -c is the cost of electricity per kW/h The...

Homework Statement The question is mostly in the picture, it has tables associated with it so I couldn't put it here.QUESTION: Make a truth table of the controller outputs enable/direction, as a function of the inputs S1, S2, R1, and R2. Since you have not been given the explicit output for...

Homework Statement A force of 5N is being applied to a 5kg block is on a table. The μk = .1. What is the velocity of the block?Homework Equations (μk)(Fn) = Ff The Attempt at a Solution (.1)(50N) = 5N of friction. The net force is 5N - 5N = 0NFrom here, I believe it is impossible to find...

The periodic table is globally known! But, it relates EACH element separately! Exist some table, some lists, some spreadsheet, etc, that relates the combinations between the elements and give us the information about each combination? PS: for "combined elements" I want to say simples substance...

I'm sorry for being so vague here, but perhaps my post will ring a bell for someone who can fill in the details. A few weeks ago in a waiting room I was reading about a proposed rearrangement of the Periodic Table based on measurements of the ionization potentials (I think I got that right) of...

Create a program in C++ that makes a multiplication table. Ask the user how many numbers should be in the table. Requirements Store all of the data in a 2-dimensional vector of ints. Allow the program to run repeatedly until the user is finished. Do not allow inputs outside the range of 1-9...

Homework Statement A rope of uniform mass per unit length ##\lambda## and length ##L## lies curled on a table, with a short length ##\delta l## of it hanging through a hole in the table. At time zero, the rope begins to slide through the hole. At what time ##t_c## (in seconds) does the end of...

I'm working on a problem and need to find quality, mass, and pressure. I'm given a temperature (2°C), a volume (1200m^3), and a percent volume occupation (1% saturated liquid). Is it "legal" to use the saturated liquid tables, at 2°C, to find the volume or pressure (I forget which one we were...

Homework Statement One of the problem in my homework is a question that ask is ASCII table (https://en.wikipedia.org/wiki/ASCII) a function and require me to answer mathematically which i don't know how. Homework EquationsThe Attempt at a Solution I think ASCII table is not a function because...

<< Mentor Note -- Moved from the technical math forums, so no HH Template is shown >> I am currently working through a Finite math book Intro to finite math: second Edition Kemeny, Snell, and Thompson. One of the exercises wants me to construct a truth table for the following: ~(p|q)...

Homework Statement Homework Equations Velocity = Displacment/Time The Attempt at a Solution Ok, so I thought this was straightforward at first, but I'm having my doubts. The position column, I filled out with the standard assumption the right and up are positive and left and down are...

Hello everybody, I would like to ask you a question about voltaic cells. Can any two electrodes from the table attached to this post make a voltaic cell? There will always be a potential difference no matter which half reactions you select. From my point of you, any two electrodes (or half...

I'm reading through an undergrad physics book, and the author says he looked up the answer to the below integral in a table. I've tried to find tables of integrals with this integral included in them, but have failed so far. Can someone direct me to an exhaustive table of integrals and their...

An interesting article on an elliptical pool table along with the math to understanding how to play on it and the physics which alters game play. http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/jul/16/loop-new-cue-sport-pool-ellipse-elliptical

Hi, I have been working on this problem for a while: You place a book flat on a table and press down on it with your right hand. The hand-to-book and table-to-book coefficients of kinetic friction are 0.48 and 0.43 respectively. The book's mass is 1.14 kg and your downward push on it is 9.70 N...

Homework Statement Table gives the rectilinear motion of a 4kg mass over a 5 s time interval. When the time was 3.8 seconds, the velocity of the mass was approximately what Homework EquationsThe Attempt at a Solution I first just tried to find the average of the velocities at 3.5 and 4.0...

I am working on a Risk Assessment for a dial table, the manufacturer states that the indexer will stop in 0.86 sec, worst case. Since the indexer is cam driven the speed varies throughout its motion. That being said I expect stop times to be highest at 90 and 270deg, while lowest at 0 and...

Greg Bernhardt submitted a new PF Insights post It's Elemental! The Periodic Table Quiz Continue reading the Original PF Insights Post.

Homework Statement What is entropy of water at 5 Bar and an internal energy of 2724 kJkg-1? The Attempt at a Solution I have looked at the steam tables, i found where the pressure is 500kpa, then i do not know where to go from there. Thank You

Homework Statement https://courses.edx.org/static/content-mit-mrev~2013_Summer/problems/MIT/rayyan/check_points/Pictures/BK85.png A horizontal uniform bar of mass 220 kg and length L = 3.0 m is placed on two supports, labeled A and B, located as shown in the diagram. A block of mass 30 kg is...

Homework Statement Following the amount of C1 front, the output Z be 1 . Following an amount of C2 front, the output Z must be 0 . Otherwise, the output remains unchanged. Homework EquationsThe Attempt at a Solution in Attached file. This is the answer but I really do not understand the...

Homework Statement In the long form of periodic table, the valence shell electronic configuration of 5s2 5p4 corresponds to the element present in A. Group 16 and period 5 B. Group 17 and period 6 C. Group 17 and period 5 D. Group 16 and period 6 Homework Equations NA The Attempt at a...

EDIT: I figured out my mistake...no option to delete silly post. Oh well. 1. Homework Statement The problem is: use iterated integrals in polar form to find the area of one leaf of the rose-shaped curve r = cos(3*theta). My setup agrees exactly with the solutions manual...but then something...