What is Compare: Definition and 153 Discussions

Comparison or comparing is the act of evaluating two or more things by determining the relevant, comparable characteristics of each thing, and then determining which characteristics of each are similar to the other, which are different, and to what degree. Where characteristics are different, the differences may then be evaluated to determine which thing is best suited for a particular purpose. The description of similarities and differences found between the two things is also called a comparison. Comparison can take many distinct forms, varying by field:

To compare is to bring two or more things together (physically or in contemplation) and to examine them systematically, identifying similarities and differences among them. Comparison has a different meaning within each framework of study. Any exploration of the similarities or differences of two or more units is a comparison. In the most limited sense, it consists of comparing two units isolated from each other.
To compare things, they must have characteristics that are similar enough in relevant ways to merit comparison. If two things are too different to compare in a useful way, an attempt to compare them is colloquially referred to in English as "comparing apples and oranges." Comparison is widely used in society, in science and in the arts.

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  1. Uriel

    How good is a fit for a set of points?

    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...
  2. S

    Trying to compare two different weights during drop test

    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...
  3. S

    Trying to compare two different weights during drop through analysis.

    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...
  4. S

    Compare the Ks0 values of MnCO3(s)

    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+...
  5. D

    Compare forces exerted between the Tennis Racquets

    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...
  6. I

    C/C++ C++ String Compare: Alphabetize Strings

    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"...
  7. N

    Compare rate of reaction of organic and inorganic compounds

    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...
  8. C

    How to compare these two sets of data?

    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...
  9. E

    How to compare two data sets with statistics?

    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...
  10. T

    Series to compare to for comparison test

    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...
  11. Albert1

    MHB How Do the Fractions A and B Differ in Value and Structure?

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

    Software assignment - Evaluate the limit & compare the series

    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...
  13. C

    Compare weights at equator and poles?

    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.
  14. A

    Quantitatively Compare the values of objects A and B

    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...
  15. Albert1

    MHB Compare P and Q: $a, b, c, d, m, n > 0$

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

    Compare Velocity of Center of Mass - Two Hollow Cylinders

    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...
  17. anemone

    MHB Compare S_n and T_n: Sums of Fractions

    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}.
  18. anemone

    MHB Can a^3+b^3+c^3 Equal d^3+e^3 Given Specific Conditions?

    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...
  19. H

    How Does Fitzpatrick Compare to Spivak?

    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...
  20. X

    How do UK levels compare to the EU levels I know ?

    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...
  21. W

    Quantitative way to compare theoretical values to experimental values

    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...
  22. L

    Schools How to compare potential advisers for grad school?

    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...
  23. S

    Schools How does high school maths compare to university maths?

    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...
  24. N

    Finance formulas to compare the best value of a house

    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...
  25. W

    Compare Mass-Pulley Frictionless Slope

    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...
  26. W

    How does the size of He- compare to that of a neon atom?

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

    Some doubts I have while trying to compare boiling points/ solubility

    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...
  28. J

    How does the computing power of my phone compare to my old desktop?

    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...
  29. P

    How does the energy usage per cell compare for different organisms?

    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...
  30. O

    How does Hughes-Hallett compare, and what to read next?

    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...
  31. S

    C# Loops to compare many rows between 2 worksheets in C#?

    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...
  32. B

    Physics Compare and contrast: career in medicine or physics

    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...
  33. C

    Ionization energy - compare 2 unknown elements and decide their group

    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...
  34. Z

    Calculate binding energy & compare to Electrostatic Repulsion

    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...
  35. C

    How does production cost of absorbent paper compare to that of printer paper?

    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...
  36. T

    Integral Test: What should I compare this series with to prove it's convergence?

    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...
  37. J

    How does traction compare to the width of a tire?

    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...
  38. T

    Comp Sci C++ compare strings program using pointers

    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...
  39. Z

    C/C++ C++ how to compare two objects of the same class?

    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.
  40. R

    Unsure of how to compare non-paired values

    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...
  41. S

    Compare and/or combine two Access database tables

    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...
  42. Loren Booda

    How does maximum symmetry compare to its corresponding minimum symmetry?

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

    Compare Carroll & Ostlie's Astrophysics Texts: Any Suggestions?

    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...
  44. L

    Comparing Daylight Increase in Philadelphia Using a Model

    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...
  45. S

    Compare centripetal acceleration of Mars and Earth

    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...
  46. A

    We did a lab in class to compare W and KE

    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...
  47. S

    Carbon Compounds: Orbital & Bonding Energies Explained

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

    Compare the structure of RNA and DNA with respect to the following characteristics.

    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...
  49. A

    Compare final T of reversible/irreversible equations

    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})}}...
  50. M

    Compare efficiencies of petrol/Dieselstirling

    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 ...
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