Compare Definition and 153 Threads

Hello, I have the following problem. I have a system of differential equations, with two parameters that satisfy certain condition. 0 < 1.5(1-a) < b < 1. So when I fix the value of a I can find values of b satisfying this and its associated equilibrium point. When I calculate (with...

Hi guys, I am working on a project at work where we make part a which weighs 10 pounds and part b which weighs 13 pounds. Parts a and b both get packaged in a foam container. I have test data on part a that says it will survive drop tests, I was hoping to do analysis to say part b will also...

Hi guys, I am working on a project at work where we make part a which weighs 10 pounds and part b which weighs 13 pounds. Parts a and b both get packaged in a foam container. I have test data on part a that says it will survive drop tests, I was hoping to do analysis to say part b will also...

Homework Statement compare the Ks0 values of MnCO3(s) in fresh water (I=0) and in estuarine waters (I=0.08) at 25°C. If each of the waters contained a concentration of CO32- equal to 10-6M and MnCO3(s) controls the Mn solubility, what is the Mn2+ concentration in each water? What is the Mn2+...

Homework Statement During a tennis volley, a ball that arrives at a player at 40 m/s is struck by the racquet and returned at 40 m/s. The other player, realizing that the ball is out of bounds, catches it in her hand. Assuming the time interval of contact is the same in both cases, compare the...

Print the two strings in alphabetical order. Assume the strings are lowercase. End with newline. Sample output: capes rabbits Sample program: #include <iostream> #include <string> using namespace std; int main() { string firstString; string secondString; firstString = "rabbits"...

I want to ask the rate of reaction of organic compound is slower or higher than that of inorganic compound?? I have found an ansswer like that : The organic paricles are molecules. Because of strong covalent bonding within the molecule, organic compounds do not readily react. Reactions...

Hi I have two sets of data, y as a function of x, for two different experiments. Y is the dependant variable, an instrument reading, x is the independant variable, a concentration of something in a solution. Plotting the data in excel gives me 2 curves. The experiments were...

I have two questions: I have a set of data, a measured spectrum. When I model the spectrum with a function, I calculate r2=1-(\sum(y-ymodel)2/\sum(y-yavg)2). Q1) However, I have reference data now, which is what the spectrum should be. So is it right to use the same calculation on it for...

Homework Statement Does \sum_{n=1}^{\infty}a_n where a_n = \frac{(n+1)^{1/3}-n^{1/3}}{n} converge or diverge? Homework Equations The Attempt at a Solution The ratio test is inconclusive, as is the root test. The limit is equal to 0, but that doesn't say much. I've tried to find...

A=$\dfrac {\sqrt {998}+9}{\sqrt{998}+8}$ B=$\dfrac {\sqrt {999}+9}{\sqrt{999}+8}$ Please compare A and B

Software assignment -- Evaluate the limit & compare the series Homework Statement Homework Equations The Attempt at a Solution In part a, I used Microsoft mathematics and found it e In part b, I used \sum but I can't find the right formula I don't want an easy answer but I...

Hello, I need some help understanding this question. If we take a mass of a person as 100kg, what would he weigh at the poles and the equator, in Newtons? How do I do this please? Thanks and much appreciate some help.

Homework Statement *See attached graph* If A has the greater value answer A. If B has the greater value answer B. if equal answer equal. Average Velocity from t = 0s to t =2.5s Average Velocity from t = 0s to t =5s Displacement from t = 0s to t =2.5s Displacement from t = 0s to t = 5s...

$a,b,c,d,m,n >0$ $ P=\sqrt {ab}+\sqrt {cd}$ $Q=\sqrt {ma+nc} \times \sqrt {\dfrac {b}{m}+\dfrac {d}{n}}$ $compare\,\, P \,\,and \,\,Q$

Homework Statement Homework Equations mgh=\frac{1}{2}mv^2+\frac{1}{2}Iω^2 The Attempt at a Solution I used conservation of energy, and found that the final velocity of the center of mass is independent of the object's mass, so in both cases: v=\sqrt{gh} . Therefore, the ratio is 1. However...

Compare S_n=\sum_{k=1}^{n}\frac{k}{(2n-2k+1)(2n-k+1)} and T_n=\sum_{k=1}^{n}\frac{1}{k}.

Problem: Let $a$, $b$, $c$, $d$ and $e$ be strictly positive real numbers such that: a^2+b^2+c^2=d^2+e^2 a^4+b^4+c^4=d^4+e^4 Compare a^3+b^3+c^3 with d^3+e^3. I have been exhausting all kinds of algebraic tricks, but I still don't get anywhere near to cracking it, and it is so frustrating...

Hi all, I'll be taking analysis in the fall, and I would like to do some preparation for the course over the summer. It's pretty clear that this forum recommends Spivak's Calculus text as the ideal for such a task, but I'm wondering how it compares to Patrick Fitzpatrick's Advanced Calculus...

Hello, I currently have a bachelor in IT (evenig classes). I live in Belgium and the only grades I know are Bachelor/Master/PhD. Maybe I would like to find evening classes in physics, even if it's in another country (very hypothetical for now). I'm currently looking for infos about the...

I am looking at the cross-sectional shape of a sagging membrane. I have several theoretical models, neither of which fit perfectly. So rather than comparing values, I'm comparing shapes. One model fits fairly well, however I'm unsure of which quantity is correct to specify a 'goodness' of a...

How do you go about actually narrowing down potential advisers from different schools? What are some tips for visitations that will help with this decision? How does one compare the prestige of different advisers? Counting publications seems silly and asking around your undergrad department...

I am in my final year of high school, I am doing the highest level of maths available but I don't find it difficult at all, so I was wondering whether or not I should cover some university level mathematics before doing bachelor of science (Advanced) next year. For this BSc I am allowed to do...

Homework Statement House one is going for say 350.000 and House two is going for 250.000, both have the same bed and bath. Yet i want to add variables for instance house one has a decline in crime rate variable also a newly build mall. House two has new schools and crime is on the rise. So my...

Homework Statement If the left-hand slope in the figure makes a 60 degree angle with the horizontal, and the right-hand slope makes a 30 degree angle, how should the masses compare if the objects are not to slide along the frictionless slopes? Express your answer using two significant...

I understand that He- is larger than He, but I don't know which is bigger between He- and Ne.. please help??

I was trying to compare some solubilities (in water) and some boiling points, and I could not explain it for some molucules. Also, I have some doubts in the theory itself. Why is 2-pentanone more soluble than pentanoic acid? Why is a ketone more soluble than the respective aldeyde...

This question came up in conversation the other day and I was wondering if anyone could quantify this. How far back in time must I go before I find a desktop computer that is only as powerful as my Nexus S smartphone? Would that be a Pentium III, for example? I understand that the answer...

Recently I saw an article about sled dogs burning 10,000 calories in a day. Even when adjusted for mass, this is significantly more energy than a human athlete might use. This got me thinking: how much energy do bacteria use in a day? Trees? Fungi? Other animals? I can think of lots of...

I'm looking to do a calculus review, but I'd like to use a slightly more advanced book than I did earlier this year. (Part of a new theme for me. I'm almost finished with Purcell's book after stumbling on it in the library. My class was using Giancoli, so I've kind of just discovered this...

Hello All, I took it upon myself to create a tool for my job that xref 2 excel worksheets on 2 different workbooks. Customers send us parts and they're wanting the leadtimes for them. We have a weekly report that has all part numbers with their leadtimes. My goal is to create a GUI in C# that...

Hey, I am currently graduating high school (this weekend) and I will be attending UC Irvine for undergraduate. My question here is to compare and contrast the careers of being a doctor or a physicist. I have always been interested in science but I am not completely sure what to major in...

Hello. I have a question about ionization energy: Two hypothetical elements in the 2nd or 3rd period have the following ionization energies: Element X First: 800 kJ/mol Second: 2500 kJ/mol Third: 3900 kJ/mol Fourth: 23000 kJ/mol Element Y First: 700 kJ/mol Second: 2200 kJ/mol...

Homework Statement 4He2 has size of ~ 2 x 10^-15 m and a mass of 4.0015u. Calculate the binding energy of this nucleus, and compare it to the electrostatic repulsion of its constituents. Homework Equations The Attempt at a Solution For the first part I have calculated...

I know that right now an A4 page sells for 0.8 cents at Walgreens. So presumably the thing is dirt cheap at the factory gates. For toilet paper I don't have any handy store prices to quote, but I do have a nagging suspicion of being overcharged. So, generally speaking, what is the economic...

Homework Statement Here is the problem: http://dl.dropbox.com/u/64325990/HW%20Pictures/integraltest.PNG The Attempt at a Solution I know it is convergent because it is very similar to 1/n^1.5 which is convergent as well. However what would I compare this with using the Integral Test to...

Please help settle this argument I had with a friend. We both have fast FWD cars, and on road courses we both have problems with oversteer (where the back of the car slides out on corners). He says if I put wider tires on the rear of my car, I will have less oversteer. My understanding of...

Homework Statement Create a function called isEqual(). isEqual() takes two strings and determines if the strings are identical. isEqual (s1, s2) should be the same as s1 = = s2 #include "stdafx.h" #include <iostream> using namespace std; bool isEqual(int *s, int *st, int x); int...

Hi, noob question here, In C++, how can I return boolean comparison between two object pointers? ie. return True if the pointers point to same object. I've tried == but it doesn't work. Do I need to define a comparison method from within the class? If so what is the syntax for doing it? Thanks.

I am currently trying to show that two numbers are significantly different but I am unsure of how to do the statistics. I'll provide a brief description below. I have 4 arrays: Array A Array B Array C and Array D I can determine the difference between 2 arrays using a student's t-test From...

I have just discovered that two people have been typing into separate copies of 'the same' MS Access database for some while. It came to light when one said, "Why can't Jo see the changes I make?" Any suggestions on how to combine the two tables or at least compare them with a view to...

In a mathematical system, what similarities are there between the most and least absolute symmetries? Might Noether's theorem explain this?

Hey everyone, I'm just wondering what the main difference is between Carroll and Ostlie's "An Intro to Modern Astrophysics" and "An Intro to Modern Stellar Astrophysics". I already have the former and have gone through a significant part of it. Does the latter contain any new information, or is...

1. Homework Statement A model for the length of daylight (in hours) in Philadelphia on the tth day of the year is given. Use this model to compare how the number of hours of daylight is increasing in Philadelphia on June 5 and June 15. (Round your answers to four decimal places). 2...

Homework Statement Is the centripetal acceleration of Mars in its orbit around the Sun larger or smaller than the centripetal acceleration of the Earth? Homework Equations I assume that the relevant equation is a=v^{2}/r since you are trying to compare the centripetal accelerations of Mars...

Hi All, I am a real noob with physics...not my best topic. Trying to do the best I can. Just want to run my noob logic past some people much better at physics than me. We did a lab in class and I think I have the correct answers but just want some confirmation. Homework Statement We...

why carbon can form polymers and sillicon not? though both are tetra valent. explain this based on its orbital and bonding energies

Homework Statement 3) Compare the structure of RNA and DNA with respect to the following characteristics. Length Function Molecular components Homework Equations The Attempt at a Solution I know nothing about the length, Function: RNA reads the info in DNA and transports...

Homework Statement Suppose CA = CB = C in equations 2.93 and 2.109 (shown below). Compare the form of expressions for the final temperature. Homework Equations (2.93) T = \frac{C_{A}T_{A} + C_{B}T_{B}}{C_{A} + C_{B}} (2.109) T = T_{A}^{\frac{C_{A}}{(C_{A}+C_{B})}}...

Homework Statement FOR THE SAME HIGH AND LOW OPERATING TEMPERATURE LIMITS, compare the efficiencies of petrol , Diesel, and stirling engines Homework Equations The Attempt at a Solution the efficiency of petrol as i found is : η=1-[1/(r^(δ-1))] the efficiency of Diesel ...