Comparison Definition and 393 Threads

Hello everyone, Could anyone please show me the appropriate formulas which I need for the following question? 1. How many times louder or softer than sound level of 40 dB is a sound at a) 68 dB? b) 0.3 dB? Thank you.

can anybody focus something on how pipes in parallel will work in comparison to the same pipes in series.i want to calculate pressure drop across 4 parallel pipes emerging from a tank & entering inside the other tank . pipes of sam dia,& same length. thnks

Homework Statement What are the differences between AC synchronous motors and AC asynchronous motors. Also, what are the simple and non technical differences between AC and DC motors. Homework Equations The Attempt at a Solution

Homework Statement First questions is: How to choose between using the ordinary comparison test, or using the limit comparison test? Homework Equations The Attempt at a Solution then, for these two problems below, i decide to use the limit comparison test: SUM n_infinity...

anyone who has a pool heater? or knows how they are installed? if yes...please let me know what is the power rating of the pool heater and what size the pool is..i need it for comparison issues. (power in BTU/Hr, kW, J/s...) thnx Elie

Homework Statement Use the box and the behavior of rational and exponential functions as x \rightarrow \infty to predict whether the integrals converge or diverge. Here is the box: \int^\infty_1 \frac{1}{x^p} dx converges for p > 1 and diverges for p < 1. \int^1_0 \frac{1}{x^p} dx...

Homework Statement Use the box and the behavior of rational and exponential functions as x \rightarrow \infty to predict whether the integrals converge or diverge. Here is the box: \int^\infty_1 \frac{1}{x^p} dx converges for p > 1 and diverges for p < 1. \int^1_0 \frac{1}{x^p} dx...

Homework Statement heres the equations: http://img407.imageshack.us/img407/738/untitledzk8.jpg there are two equations, a and b. Homework Equations 3/n^2 for a, and 1/n for b. The Attempt at a Solution Using the limit comparison test, i don't understand why to use 3/n^2...

Hi all, Is it 100% sure that students graduated from great universities like UC Berkeley or Stanford are much more qualified than those from normal State Universities? Is it 100% sure that alumni of great universities are much more likely to become famous such as inventors or...

What do you guys in general think will prove to be more difficult in terms of workload: Introductory Macroeconomics Introductory Biology Introductory Chemistry Between Intro to Bio and Intro to Chem, which one would be harder? Note that one of these courses will be used so that I can take 20...

cin or scanf? i use cin from iostream.h in c++ i also knowabout scanf in stdio.h but which is better? What is the difference betweeen the both? -benny

Sir, It is said that a hollow sphere cools faster that a solid sphere. Is it because a hollow sphere contains smaller quantity of heat than the solid sphere? Or is it because the rate of heat loss is inversely proportional to thickness of the conductor through which heat is lost?

In Homer's Odyssey, Odyssius has to deal with the seduction of eternal life with lots of women, but choses to go back home to his wife and son; this is what I got from watching it on sci-fi; I've yet to bye the time to read it myself even though I bought the Homer works awhile ago, but thumbing...

Hello, Do you know a website which has established a comparison between all spectrometry techniques like SAAF, ICP, SAAE, ICP-MS, LA-ICP-MS etc... concerning the nature of the analysis, the concentration domain, the nature of radiation and the main principle. thank you very much Bibinou

F.o.i.l or Box? What is the better method the F.O.I.L method or the (I am not sure of the offical name) box method(where you make a box with 4 squares) to factor. Are there any other methods availible?

If Darvin knew about genetics or even about what mendel was researching, how do you think it would have changed his theories?

Hi, we have a particle in a potential. We are asked to state what information we need to have a well defined problem, and since the equations of motion are second order wrt time derivates we need to know the position of the particle initially and its velocity. We are then asked "in the quantum...

I'm looking for some math software that I'll be able to use through university. I'll be doing honors in physics next year. I know there are nice TI graphing calculators but how do they compare to computer software? What are your opinions on Mathematica vs Maple vs ______?

1) In the basic probability theory the concepts of mutually exclusive events and independent events share prominent roles, can two events be both mutually exclusive and independent at the same time? 2) What are two vital concepts and the relationship between "Critical Value Method" and the...

Anybody notice it? I think it looks much better than the old one :smile: http://img415.imageshack.us/img415/1435/pfnewicon3eq.th.png Here is the old one, for those who don't remember: http://img415.imageshack.us/img415/5804/pfoldicon0vx.th.png

hey guys, this is my first post. however! i have been lurking over this forum for quite sometime and i have have learned a lot of things from this forum, and it has been very helpful! i came across this question that is giving me a heartburn and i have scanned it below: how do you go...

I am trying to compare two probability distributions. I tried the chi-square test, but that requires binned data, and all I have is probability. It seems to work if I ignore the rules about degrees of freedom and just use df=1, but I doubt this is statistically valid. I tried to 'unnormalize' my...

Comparison between y=sinx and... y+3=2\sin(3x+\frac{\pi}{2}) vertical stretch by a factor of 2 horizontal compression by 1/3 no reflection in the x or y axis 30 degrees horizontal phase shift to the left and 3 units down vertical displacement. Can someone please check this?

Hi, I've been thinking about the comparison test for integrals. Usually when I have an integrand where the denominator is f(x) + something positive I can usually find a suitable bound without much trouble. However when the denomoninator of the integrand is f(x) - something positive finding a...

Explain how it is possible for 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water a 100 deg C. ( Assume a pressure of one atomsphere).

Alright, this question may seem simple in comparison to some of the questions in here, but whatever. So, I've been doing some reading on Quantum Superposition, and I was curious as to whether or not anyone has ever applied its principles to Spherical Standing Wave Structure of Matter. -Liam

SpaceTiger has created a very valuable thread on Mainstream Cosmology. For good scientific practice it is important to compare standard theories with testable alternatives, however ST's thread is not the place to do it. The theory of Self Creation Cosmology (SCC) presents itself as such a...

I am giving a presentation on helium 3 for a future energy source and i am looking for a way to describe (and compare) how much energy is released in a helium 3 reaction (D-T would be fine). some thing that would be clear to people who have no science background. (i.e. the amount of H-3 that...

I'm supposed to compare the series \sum_{n=0}^{\infty}\frac{1}{n!} to some other series to see if the one above converges or diverges. I have no idea of what to compare it to. I know by the ratio test that the above series converges, that is if I'm doing the ratio test correctly...

Each of the following statements is an attempt to show that a given series is convergent or divergent using the Comparison Test (NOT the Limit Comparison Test.) For each statement, enter C (for "correct") if the argument is valid, or enter I (for "incorrect") if any part of the argument is...

Test each of the following series for convergence by either the Comparison Test or the Limit Comparison Test. \sum_{n=1}^\infty \frac{2n^4}{n^5+7} this diverges using the p-series and comparison test right? p <1 \sum_{n=1}^\infty \frac{2n^4}{n^9+7} and this converges right? because p >...

Have you looked at any of these monitors? http://accessories.us.dell.com/sna/ProductDetail.aspx?sku=320-4221&c=us&cat=snp&category_id=6198&cs=04&l=en&mnf=694&Page=productlisting.aspx http://www.apple.com/displays/specs.html...

Show that they are the same number of points in a line, in a plane and in the space. I have one more question: Which set has a cardinal number greater than the continuum. Why? Thanks in advance.

What is the greatest decade for music. This is overall music in terms of depth, quality, sound, talent, etc..

I can't understand this \sum{A_n}\leq \sum{B_n} having said this if \sum{B_n} converges so does \sum{A_n}, okay that makes perfect sense but then the second rule of comparison is if \sum {A_n} diverges then so does \sum{B_n} diverges too...can anyone tell me how that makes sense...

Very objective, clearly written: http://tinyurl.com/6d9rr I won't be hosting this for tooooo long, so please get it (only 1.5mb) and mirror it if you can assist me. I'll be taking this down tonight or tomorrow :)

if you dropped a steel marble onto a steel plate and then dropped a steel marble onto a glass plate which would you expect to bounce higher?

hello everybody! i have to find match between two different peptide sequences (looking for related sequences), but don't know where and how i can do it. i have very little bioinformatic background. i hope for some help. thanks alot!

Well, with the revelation of the Abu Ghraib, among other things, sympathies and disgust are reeling forth from around the globe. The acts done arre surely despicable. But they pale in comparison to what happens here in the USA, in Europe, and other places, on a scale so large as to dwarf...

Is the gas in a scuba tank or a butane lighter potential or kinetic energy? Not including gravitational effects.

hey i sort of lost my textbook and i don't know how to do this can someone help me out Please? If so here's the question: The structure and function of the human eye and a simple camrea have many similarites. Useing the the terms iris,eyeball, retina , corena, and lens idnetify correspondying...

I have to use the comparison theorem to find if the function converges or diverges. Any ideas as to what I can use to compare the function to?? integrate: sqrt(1 + sqrt(x))/sqrt(x)dx Using the comparison theorem!

What is the ethical difference between the following situations? Also, what would be the ethical possible courses of action (or non-action) in each situation. A) Someone is going to shoot and kill some "innocent" person. You can stop him, but you have to kill him to do it. B) A boulder...