Table Definition and 894 Threads

Why did Mendelev order the elements according to their atomic masses rather than their atomic number? Why did Mendelev not include noble gases in his periodic table?

I've been working at this problem for a while and it seems that there should be an easier more systematic way of solving it. Here it is: Find a proposition using only p, q, ¬ and the connective ∧ with the given truth table. p q ? T T F T F F F T T F F T I know of a...

Homework Statement A block of mass1 5.0 kg is on a table that bonds a coefficient of friction of 3.00. Mass1 is attached to Mass2 by a string, and Mass2 is hanging over the table. The system is released from rest for it to accelerate. Homework Equations F=ma F fric = μFnormal The...

Homework Statement Let g be a function defined as g(x)=(\frac{1}{4})x^{2}-sin(x) Give a monotony table for g in the domain [-\frac{\pi}{2},\frac{\pi}{2}] The Attempt at a Solution I calculated the first derivative of g and i got g'(x)=(1/2)x-cos(x) and then when I wanted to...

Hi Here is the statement of the problem from Ralph Grimaldi's discrete math book. a) In how many ways can eight people, denoted A,B,...,H be seated about the square table shown in the figure (see attachment), where Figs 1.6 (a) and 1.6 (b) are considered the same but are distinct from Fig 1.6...

Hey, sorry for the basic question, but I'm curious. Can one create a resultant for 2 vectors that cannot be drawn head- to - tail, and are facing opposing directions? The idea is that I set up a force table and took measurements on how many Newtons of force are acting upon each spring...

Homework Statement Create a truth table for ((P->Q) == (Q->P))Homework EquationsThe Attempt at a Solution http://www.freeimagehosting.net/newuploads/94ldj.pngI've had two quizes with problems just like this marked wrong in my college logic course. I confronted the professor about it and he...

Homework Statement A cat jumps off of the table with a velocity vi at an angle θ. The table is h meters tall. How far away from the table is the cat? V(x) = ViCosθ V(y) = ViSinθ Homework Equations I first solved for time using 0 = Xi + Vit +1/2a(t^2)The Attempt at a Solution I got time as...

Hi, I'm trying to create a projection on a flat surface by using an LCD screen extracted from a flat panel monitor, a sheet of translucent fine grain paper, a Fresnel lens and an LED light source. The purpose is to project a focused image on the paper for display proposes. The idea is to...

Hi ! I am working on the modelling of the Table Tennis game. Can I calculate the Spin of the Ball after hitting without using any camera and any vision system. I know the velocity of the ball before and after the hitting in all directions (x,y,z) and velocity of the racket as well. Is...

Hi, Have a problem: I'm generating 2 lists in Mathematica: In: time = Table[(r - 1.0)/10.0 , {r, 10}] Out: {0., 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9} In: noise = Table[RandomVariate[NormalDistribution[0, 1.4], 10]] Out: {2.16764, -1.38203, -0.395928, -0.58616...

Truth Table for "A unless B", or "A , only if B"? Hi, All: My friend is preparing for the LSAT's, and he asked me to help her with the Logic Games part. Two of the binary connectives often used in those games are 'unless', and 'only if'. I guess I'm being kind of lazy , hoping...

Hi Fist of all, sorry if this is in the wrong section. I'm on a limited budget here and trying to survive with an ancient TI-85. I was doing well until I started needing the table function, now it takes ages to rewrite a value for every x in long polynomials. Does anyone know of any way...

Hi, I have a table lamp, ratings: 110 - 240V 50 - 60 Hz Max 60W The plug is fitted with 13A fuse. Now, the thing is, how did they calculate the max 60W out from these ratings? According to P = V * I, my max power should be a very large value. So can I fix a 100W bulb to this...

Hi ! I am working on a table tennis playing robot. The picture of the robot is attached. I have few questions. 1) Can I consider the collision between Ball and the plate as the two dimensional collision ? ? (At this time I am not considering z-axis) 2) If I am considering the...

See the pdf here: www.ellipticinc.com/table.pdf Will this table must be able to hold a 1500 lb axle? Just help me a bit and get me started. I have no idea where to begin.

Hello, I have a table here which describes the structure of a certain compound, but I'm unsure how exactly to read it. Unit Cell 5.940(3) 5.940(3) 5.940(3) 90.0 90.0 90.0 Vol 209.58 Z 4 Space Group P a -3 SG Number 205 Cryst Sys cubic Pearson cP12 Wyckoff...

I couldn't think of a better subject line without, basically, asking my question there. What I have is a 9x7 table and I need to know if there is an easy way to drop a number into any of the squares and then populate the remainder of the table by subtracting 1 from each square as you move...

Hello again! Let's say that i am calculating every element of a 100X300 table by using equation A I use two for loops (i m doing this in matlab) for i=1:100 for j=1:300 element(i,j)=... (it is the equation A) end end equation A involves the neighboring elements What...

Fill in the missing values in the table given if you know that dy/dt=0.2y. Assume the rate of growth given by dy/dt is approximately constant over each unit time interval and that the initial value of y is 6. Table: t-0-1-2-3-4 y-6-?-?-?-? (fill in the missing values where there is a...

Homework Statement Construct a truth table to show: Z=(A+(not)B).(B+C).((not)A+B+D)Homework Equations The Attempt at a Solution from 0,0,0,0 to 1,1,1,1 i get 0,0,0,0,0,1,1,1,1,1,1,1,0,0,1,1

Homework Statement Consider an IP Router with four link interfaces numbered 0 to 3. Packets are to be forwarded according to the table: http://img688.imageshack.us/img688/4844/iproutertable.jpg Write down an IP forwarding table with ve entries that forwards packets to the correct...

So Arsenic is poisonous to Oxygen based life forms (Humans). What would be poisonous to a Sulfur based life form (if they exsisted)?

Hi i want to work on robotic table tennis player. So i am confuse that which kind of motors should i use. I need high response motors.

Hi PF, I'm trying to come to grips with the work of Alexei Kitaev on applying notions from (topological) K-theory to the task of classifying phases of topological insulators and superconductors (paper here: http://arxiv.org/pdf/0901.2686v2.pdf). Despite having plenty of citations, I've yet to...

Homework Statement http://studyterps.com/files/STAT401-FE-SP09-CREMINS.pdf #5Homework Equations The Attempt at a Solution How did they get the MSTr and MSE form that table? I'm aware of the formulas such as MSE= SSE/(N-k) and so on, but usually you have some values given. Do I first...

Hi, Carry out a chi-squared test for the following table of frequencies of X ∼ Binomial(5,p) variates when (a) p = 0.3 x 0 1 2 3 4 5 Observed 162 346 303 149 36 4 frequency Now I know how to carry out the chi-squared test once I have...

Last Friday night I was invited by a group of ghost hunters to attend a venue alledged to be haunted by more than one ghost/spirit. There were two mediums at the venue. Apart from witnessing the usual 'two knocks if you are there' phenomenon. The most impressive thing I witnessed was levitation...

So I was at the restaurant last night, and noticed that at every single table with parents that had kids that looked like they were in college/high school/ or even preteen, all of the kids were on their smart phones for almost the entire dinner. The one table looked like there were 2 or 3...

Hi, I need to generate some data in a Table and then be able to do all kinds of matrix and other mathematical operations on them. Right now I am testing the commands but am unable to get them to work. My table has this extra parenthesis floating around which I'm not sure how to get rid of...

1. I have created 5 mixtures in lab and from these mixtures I am suppose to complete the equilibrium tables. I have already found most of the data via calculations such as the absorbency and the concentration of IO3- (which is the one known concentration on the equilibrium chart) I am just...

Homework Statement Describe the transformations that must be applied to the graph of y=5^x to obtain the graph of y=2-3(5^x+4) and complete the following table. y=5^x (-1,1/5) (0,1) (1,5) (2,25) (3,125) y=-3(5^x) y=2-3(5^x+4) Homework Equations y=5^x ...

While studying groups, Is there a common pattern/arrangement of the group elements represented in a table? Is there a pattern for the associativity axiom? Thanks.

Homework Statement I need to find an isomorphic group for the following group F A B C D E F G H < these are the rotations/reflections, f is the operation followed by A G D E B C H A F B D G F A H C B E C E F G H A B C D D B A H G F E D C E C H A F G D E B F H C B E D G F A G A B C D E...

Attached is the graph and small part of table that i have chosen from the elastic range (first column extension, second column load) from a tensile test. I am trying to calculate youngs modulus of elasticity but can't seem to get a figure close to that of the common figure for the material...

Please, help me to add References to add table tool in a form in MS Access 2000. I want to add table in a form that can resize the column width by click and drag it.

Homework Statement ∫e2xarctan(ex)dx Homework Equations From the table of integrals: #92 ∫utan-1udu = (u2+1)/2)tan-1-u/2 + c or #95 ∫untan-1udu = 1/(n+1)[un+1tan-1-∫ (un+1du)/(1+u2) , n≠-1 The Attempt at a Solution The answer is 1/2(e2x+1)arctan(ex) - (1/2)ex + C I don't...

Firstly, I apologize if this is the wrong section to post, not sure where in homework help for logic is suppose to be post. Otherwise, I have no idea how to approach this problem, I just make an equation and hope and pray it matches the results of S, or try and keep adding statements to bring...

I am trying to create a mathematical model from a table of possible permutations. The table essentially consists of a list of various combinations of variables (there are 7 of them) and then an education guesstimate of how long that combination would take. Each variable is restricted to a...

Hi I'm trying to convert m3/hr to kg/hr for a steam system operating at 14.5 barg and 1150 deg C. I was planning on using steam tables to get the specific volume but anywhere i look the temperature seems too high to have any values. Any suggestions of places that do have the values I'm...

Hello.It seems that older periodic tables showed just eight groups but most modern periodic tables now show eighteen.Are there any reasons why eight used to be preferred and why eighteen is now chosen?I'm guessing that the change over is due to...well I don't know.Thanks for any answers.

Homework Statement Find a formula for the number of ways to seat r of n people around a circular table, where seatings are considered the same if every person has the same two neighbors without regard to which side these neighbors are sitting on. Homework Equations None The Attempt...

Two families are at a party. The first family consists of a man and both his parents while the second familly consists of a woman and both her parents. The two families sit at a round table with two other men and two other women. Find the number of possible arrangements if the members of the...

Any opinions would be appreciated.

In his PBS series videos, Brian Greene states the reason being electromagnetic forces between the charges in my body and the object (falling human and the ground in this case) In her book 'Warped Passages', Lisa Randall states the reason being the Pauli's exclusion principle for the fermions...

Homework Statement 4. (9) On an old style record turntable a small rubber wheel is used to drive the larger platter. They are mounted so that their circular edges touch and do not slip while in motion. The small wheel has a radius of 2.0 cm and accelerates at the rate of 3.5 rad/s2 while it...

Homework Statement Discuss the evidence from the periodic table of the need for a fourth quantum number. How would the properties of He differ if there were only three quantum numbers, n, l, and m? Homework Equations The Attempt at a Solution The Pauli Exclusion Principle...

problem: have a table (but not the one I need) with three 3 variables (one of these changing) and known answer for these. I need to change one variable but I do not know the formula. Is there any way to figure this out: known table: v1: 1,833 v2: 15,89 v3: 53/9 this gives me a table...

I don't understand why there are 2 dashed values in this table: http://en.wikipedia.org/wiki/Quantum_number#Quantum_numbers_with_spin-orbit_interaction. I have that j=l+s,l+s-1,...,|l-s|. So let's take #1 of the table. They give l=1 and we know that s=1/2. Thus j=l+s=3/2 or j=l-s=1/2. Why...

Homework Statement On a frictionless table, a glob of clay of mass 0.72 kg strikes a bar of mass 1.34 kg perpendicularly at a point 0.23 m from the center of the bar and sticks to it. If the bar is 1.22 m long and the clay is moving at 8.3 m/s before striking the bar, what is the final...