Natural Definition and 1000 Threads

Hi experts! As you will see I am NOT one but I have a rather unique problem in search of a solution. I have a natural gas well that runs 11psi but has little volume because it is only 412 feet deep. Rather than pay thousands to drill to approx 850 feet to improve volume, I thought it...

this problem is an excerpt from an explanation of a time wieghted performance method. I feel that if I can follow this part the rest of it will make sense. now i know the answer is .1259 but I'm a little fuzzy on how exactly they got that, and their 'step by step' seems to miss some steps. it...

First of all I want to make clear that this topic isn't about ID. On wikipedia I read this definition of NS: Not too long ago I saw this story about intelligent bacteria: Further down the article u can read how bacteria behave and 'help' each other out in different situations, some...

i have a question I'm attempting as extra work, I have tried the usual method but no luck... find expressionsf for dy/dx in terms of x and y: ln(x^2+1) + ln(y+1) = x +y

How could you tell if you had missed one of the natural frequencies when you were finding natural frequencies above the fundamental? thnx a lot

Elsevier is a major science publisher and they do, among other things, handbooks. An Elsevier handbook is scheduled to come out this year (2006) on Philosophy of Physics. Probably some good stuff about foundations of physics and what the success of quantum mechanics and general relativity tell...

let f(x) = ln(x-2)+ln(x-6). Write down the natural domain of f(x). i got this bit right, it's x>6 find f'(x) i got 1/(x-2) + 1/(x-6) which i think is right. then it says find the intervals for which f'(x) is a. positive and then b. negative. for a. i put f'(x)>0 and solved...

Hello everyone the problem I am messing up is: . Solve the following initial value problem: http://img59.imageshack.us/img59/9037/lastscan4vl.jpg When pluggin in answers and using my calculator to evaluate, its saying NON-REAL numbers, I'm messing up hardcore somewhere but not sure where...

Problem states: (A) Use mathematical induction to prove that for x\geq0 and any positive integer n. e^x\geq1+x+\frac{x^2}{2!}+...+\frac{x^n}{n!} (B) Use part (A) to show that e>2.7. (C) Use part (A) to show that \lim_{x\rightarrow\infty} \frac{e^x}{x^k} =...

This is the problem: (A) By comparing areas, show that \frac{1}{3}\ll\ln1.5\ll\frac{5}{12} (B) Use the Midpoint Rule with n=10 to esimate \ln1.5.I've seen these types of "comparing areas" problems but I kind of forgot how to go about solving the problem...I was thinking...

Does anyone know of any way to measure the natural frequency of concrete? Any input would be extremely helpful, even if the method does require sophisticated technology or machinery :smile:

I have a tricky natural log in front of me. It's ln(1/x). The reason it's tricky is because I thought that I could re-write it as ln(1)-ln(x), as per the rules of logs, but that doesn't seem to agree with my calculator. Is there a reason why? Thanks!

Hi all. I'm slightly confused with the following limit prob: \lim_{x\rightarrow \infty} \frac{(ln (x))^n}{x} which I know = 0. (n is a positive integer) It looks like it's of indeterminate form, that is \frac{\infty}{\infty} Using L'Hopital's, it looks like you get another indeterminate form...

Any nice proofs for this? 2\sqrt{n+1}-2\sqrt{n}<\frac{1}{\sqrt{n}}<2\sqrt{n}-2\sqrt{n-1} I hope the tex came out alright. have fun! ps. n is any natural number.

Does "natural selection" apply extra-galactically? Would the rules of natural selection (in this Universe, but possibly in a different galaxy) still apply? In that regard, how might they differ? Basically what I'm driving at is, if we were to encounter life outside Earth who popped in...

What are good remedies to stay up later? Yesterday night I went to bed at 12:30am, and tonight I have to do that again. But its only 9:30 and I am already sleepy. I keep falling asleep while typing my essay which is due tomorrow. :zzz: What should I eat or drink to stay up later?

I have to prove that for 0<=k<=n that nCk(n choose k) is a natural number. I try by induction but i end up with n-m/m+1 must be a natural number which i don't know how to prove, is there another way besides induction? Could someone help me out? Thanks, Jack

I know zip about biology, but I know a little physics. Before Einstein's general theory of relativity challenged it, the prevailing scientific theory of gravitation was Newton's theory. In the minds of most physicists, the issue was resolved in favor of Einstein's theory as a result of an...

Yes I am! Natural Cures "They" Don't Want You To Know About, the 10th best selling book of 2005, yet it gets a 2.5 out of 5. Yeah, that's messed up. Says something about some books...

when trying to solve ln(x+4)=2 i tried this ln(x+4)=2 e^2=(x+4) ln e^2=ln(x+4) 2=ln(x+4) and round and round i go... where do i start to go wrong?

Is a Halo Orbit, such as the one employed by the SOHO spacecraft , a powered orbit (requires corrective burns)?. L1 is unstable, but everything I Google about Halo Orbits seem to suggest that the spacecraft happily orbits the L1 point in a Halo Orbit without corrective burns. Does it do...

Hello all. I am stuck on this homework problem. It wants me to find \frac {d^2y} {dx^2} when y= ln x^8 The book answer is \frac {-8}{x^2} But I only can get \frac {-8}{x^9)} Please give me some guidance Thanks

Could Someone help with this question ? What is the probability that a number of the set \Omega, first 120 natural numbers {1,2,3, ... , 120}, picked at random is not divisible by any of the number 3, 4, 6 but is divisible by 2 or 5 ? Thanks

Could Someone help with this question of probability ? What is the probability that a number of the set \Omega, first 120 natural numbers {1,2,3, ... , 120}, picked at random is not divisible by any of the number 3, 4, 6 but is divisible by 2 or 5 ?

Well, my parents are hooked on this idea of mangosteen! The super fruit drink that'll fix your whatever for $35 a bottle. Where does this fruit drink (most commonly sold as Xango) stand in the scientific community? Simple fruit drink marketed as a natural cure phenomenon or does it actaully help...

What is the "cause" or meaning of the term natural death?

Someone posted in another forum that "Evolution is the result of hundreds of thousands of years of natural selection." Is that true?

What makes (Natural, not implants) breasts the size they are, percentage-wise I mean? (Eg is it (for example) 10% fat, 10% hormones, 10% genetics?) (Would the amount things affect breast-size, percentage-wise, vary with genetics?)

Why does everything have a natural frequency at which it oscillates when struck by a single force and then left to oscillate? Does everything only have one? Does it vary depending on what the original force to cause it to oscillate was? Also, why does force imposed at natural frequency casue...

can anybody tell what is a natural frequency in lay man terms. any website?

Does anybody know the typical natural frequency of an empty wine glass? I want to conduct a demo experiment of breaking a wine glass with a sound wave from a distance. Has anyone here done it before? I need a signal generator (sine wave) and an amplifier. What kind of loudspeaker do I have...

Would you please tell me how to calculate natural number e ? How that number came into being ? Thanks

Double-Slit with Natural Light? Hi, I would like to know if it is possible to perform the double-slit experiment with natural lighting conditions. I work with photograhy and would like to know if there is a way to capture the "interference patter" of a particular scene (i.e. ocean...

Can you please post pictures (Preferrably close-ups but they don't have to be) of natural (Not man-made) green eyes in this thread (I need them for a school project I am doing on genetics) and I am having trouble finding close-ups of ones that I know are natural) (If the pictures look really...

Hi, I have a question regarding natural growth and logistic models. According to my textbook, any exponential equations, P(t) = e^kt can be expressed logistically as P(t) = K/(1 + Ae^-kt) where A = (K-P0)/P0. When I applied this rule to P(t) = e ^0.0015t, and P(t) = 6000 / (1 + 5e^-0.0015t) it...

Ok so i was doing a problem involving finding the pressure of mercury at its boiling point (630.05K) using Troutons rule and the final answer seems a bit strange to me. Integration of the Clausius-Clapeyron Equation: {ln(\frac{{P}_{2}}{{P}_{1}}) =...

Hello. I am working on this problem 0=0.002*e^-(0.005/2R) I am supposed to find to find "R". The only way I know how to do this gives me 0... but I know that it's not the answer. Got any tips?

Is it possible to express all natural numbers greater than 2 as the sum of N unique prime numbers? For example, 6 = 2 + 3 and 18 = 13 + 5.

Cosmological Natural Selection is a testable idea for explaining why the constants in physics and cosmology----the parameters of the standard models used in the two fields----have the numerical values they do. I expect it's important enough so that it deserves a more transparent thread...

How can one write any natural number n in one and only one way as 1 less than a power of 2 times an odd number? n=2^f(n)(2g(n)-1)-1 where the red minus is the modified difference function, i.e. x-y =x-y if x>=y or x-y=0 if x<y

Still working on wrapping my head around these things in general... It strikes me that, unless I'm really flubbing something up, a natural isomorphism T between two functors F,G:A-->B can be regarded itself as a functor B-->B. For the objects, we just send each object X to the target of...

I'm looking for help constructing the natural isomorphism between V\otimes V^* and \operatorname{End}(V), with V a vector space. So far, I think I should have functors F and G which take V \mapsto V\otimes V^* and V \mapsto \operatorname{End}(V). I'm having a little trouble figuring out how...

I haven't been able to prove: ln(e)/e > ln(pi)/pi without calculating any of the values. Help would be much appreciated.

This is regarding... Liquified Natural Gas I need to know the facts about this. They are currently thinking about building large LNG Importation Facilities in my area, or pretty close to my house I guess. At the moment, they will have a Public Hearing before doing anything. As of...

can anyone help me find the natural domain and range of f(x) = 1 - log_3x *the whole equation is under a square root sign, its just a couldn't latex it

What is it, and can you give me a few examples of how its used? Thanks, Mary

I am interested in a system of natural units that I see used more and more frequently in Quantum Gravity research papers so I like to try using them. the units are like conventional Planck except |8piG| = 1 I want to see if there is anything in the Cambridge Handbook of Physics Formulas...

I'm only interested in the inference rules. I've read that people use different sets of rules, and I'm trying to find all of those different sets. Here's the ones I have so far (read "/" as a line break): 1. Modus Ponens (M.P.) 2. Modus Tollens (M.T.) 3. Hypothetical Syllogism (H.S.): p ->...

What is exact procedure to find the Natural Frequency of a structure...i.e a cube (box) of Honeycomb Sandwich Panels...i have simulated the Modal Analysis in Ansys...there i got the natural frequency of very low amount ...almost 0.3Hz for First Mode,0.5 Hz for Second Mode and so on...i think it...

how do you take the natural logs?? I think this is why I can't do my problems, maybe I'm missing some basic concepts. ok, so let L({\theta}) = \theta^{-2n} \prod y e^{-(1/theta)}\sum y taking the natural log, I get ln L(\theta) = -2nln\theta + ln \prod y - 1/\theta \sum yi . I...