Strange Definition and 549 Threads

You're asked to find lim x-->0 sin7x / 4x The part of this example that I don't understand the most is how they get 1 out of sin7x/7x when x-->0. Sorry about the ridiculously small image. The dimension restrictions are ridiculous, and I didn't notice that the image didn't attach properly...

here we go. originally in root forum, like root under a root under a root etc... just don't know where to start with this one. f(x) = (x+(x+(x+(x+1)^.5)^.5)^.5)^.5)

Hi! I have a big problem with this simple question. I can manage all the other questions on the paper i got except this one, and it's even one of the easier in there. So please gimme suggestions of what formulas to use: A person is struggeling his way up a 8 degree hill with the velocity...

Hey, do you guys sometimes experience a strange feeling--at one moment you realized that something similar, or even identical (such as the same scene, the same dialogue...) has happened before, either in your dreams or happened many many years ago when u are young , but your memory just can't...

Can someone help explain the theory behind the bottom question or give me a hint without giving me the answer. It's a bonus question, but I rather get assistance before copying someone completely. I already know Permutations and Combinations and the Fundamental Counting Principal, I'm just...

Today when I was toying with a water rocket I came upon a strange phenomena. The setup was like this: I had a 625 mL coke bottle, filled half way with water. The cap had a nice hole in it, about 1.5 cm. I turned the bottle upside down, thinking that the water would just gush out, but low and...

Gravity probe B is designed to detect the distortion of space (both the linear compression and lateral shear of the vacuum) that the mass of the Earth produces by it's presence in space and it's rotation on it's axis. The hope is that this might be seen in the anticipated deflection of very...

I was looking at the different ways the operations +, *, and exponentiation can work on three natural numbers x, y, and z. I found a weird pattern when the second operation performed is exponentiation. These are the expressions: (x+y)^z \ x^{(y+z)} \ (x \cdot y)^z \ x^{(y \cdot z)} \...

http://news.scotsman.com/scitech.cfm?id=1028302004 Seth Shostak is to discuss this on Coast to Coast AM at 10:00 PM pacific time - about ten minutes from now. http://www.coasttocoastam.com/

http://www.wordiq.com/definition/Strange_matter Hmmm... what do you think? Know anything about it?

Link to little strange "Proof" it fooled me It is called 64=65. http://www.blessa.com/64-equals-65.gif

There was a woman at our organization who was quite formidable and tyrannical. I work for the group that services everyone's computers and I was loathe to get a call from her. If she had a computer problem she would call in a fury screaming, "I am the director of this department and someone...

For example a folder in my computer has the following name.. {F451F6C3-31EE-1ED1-8EE5-0FC04FC395EE} What can I say about those hex ? Thanks

A Hairless Mexican dog, a coyote with mange, an armadillo without a shell, a hybrid? An interesting story with a [dead] body for evidence. Be sure to watch the video. http://www.woai.com/news/local/story.aspx?content_id=FAE91F84-A264-4AC3-8EA4-9097690CDEFC

I don't know where this will end up, but I am going to start it here. A few nights ago my wife and I where watching TV in the bedroom, we turned off the TV and the light over the bed and went to sleep. After a few minutes (maybe five or ten, I woke up and looked at the TV. It was glowing, but...

Does anyone know of a resolution to the bug and rivet paradox? It is outlined here: http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/bugrivet.html#c1 My first guess is that the rivet does not reach the bug, and the rivet's predictions are wrong because it undergoes infinite acceleration...

Strange idea for exotic matter / antigravity I have spent quite some time on an idea I'd like to present here. Before I start, I'd like to make some points clear (due to some reactions I witnessed on other threads): 1. This theory has not been tested in any way, so I'm not trying to present...

What six letter word in the English language contains ten other words without rearranging any of its letters? On that same order, what seven letter word in the English language contains ten other words without rearranging any of its letters? What unusual property do the words FLOUR, TERN...

Some questions concerning strange words: Firstly, some I know myself (mostly trivial) 1. Find an eight-letter word containing 4 G's. 2. Find a six-letter word containing 3 Y's. 3. Find a word ending in 'mt'. (very easy) 4. Find a word containing the combination 'ufa'. 5. Find a...

Whatever applies. I like the taste of sweet, strong coffee while I am eating double aged, extra sharp cheddar cheese. Same coffee and a salty turkey sandwich goes great as well. As a Catholic School kid who went to church every morning for some years, I always liked the funerals...

http://tv.ksl.com/index.php?nid=5&sid=97513

For some reason, something just came to my mind about a strange result I got when doing a photoelectric effect experiment early this spring. I had "monochromatic" LEDs (I am most suspicious about them) shining into a hole in a "box" that contained the photo sensitive "vacuum tube thing" (the...

Do strange stars exist? Apparently they are denser than neutron stars and consist of up down and strange quarks. But are they theory or reality?

There have been strange number systems used in the past in different parts of the world ... do you know any? :biggrin:

Greetings all, I am getting strange results when solving this trig equation. I seem to be able to calculate 4 out 7 of the correct angles but how do i calculate the others? Maybe my method is wrong... A = theta 2sin2A = tanA, considering identities sin2A = 2sinAcosA and tanA =...

1) Find a function, f(x) which is discontinuous at 1, \frac{1}{2}, \frac{1}{3}, \frac{1}{4} ..., but continuous at any other points. Solution (I have come across, probably wrong and a half): f(x) = { 1 for all real x; 0 for 1/x where x is natural numbers. Can anyone tell me the answer to...

A very strange situation? Normally I keep all of this stuff in the S&D Forum but we seem to have an ongoing and genuine mystery in Italy that reportedly has many experts stumped. Since this story has maintained its status as a credible one for some time now I thought that some of you non-S&D...

I've heard about some small chip of some kind that has termendous cooling power when a current is run through it. Apparently it is a high efficiency alternative to a large refrigerator when it is kept in a small, enclosed area. It's equivalent to something like 10 bags of ice or something, I...

Strange radioactivity question. please help fast! I know this is in the k-12 forum too but i wasnt sure if this is college level stuff or not so sorrie if this is in the wrong forum. And I am not telling u to do this for me, i just want to know some equations and anything that wuld help...

Strange radioactivity question. please help fast! well, this is a strange question that i have to do a presentation on. I thought it would be easy but i can't find any information after looking through 2 major physics books and searching online. I even asked a tutor about this and still...

well, this is a strange question that i have to do a presentation on. I thought it would be easy but i can't find any information after looking through 2 major physics books and searching online. I even asked a tutor about this and still couldn't get any equations i could use. Plz don't bash me...

NEWS.com.au | Woman registered cows as voters (February 20, 2004) Address:http://news.com.au/common/story_page/0,4057,8737423%255E13762,00.html Changed:7:53 PM on Friday, February 20, 2004 I think this woman should be stopped because it is really just too hard to say, "Two all illegally...

Earlier tonight Tsunami's laptop started producing a very high pitched squealing sound. She thought it might be her hard drive - it did sound a bit like a bearing failure - but to me it sounded more like audio feedback; it wasn't, but it sounded much like that. Then, about an hour ago I had the...

I heard they have developed a watermelon that is red on the outside, yellow rind, and a green center. They say it tastes like any other watermelon. I wish people would leave well-enough alone. I don't want green ketchup, either.

I don't get this: "Its empirical formula is C 10 H 17 N 3 S • 2 HCl • H 2 O" What is with those dots? And the middle part has a number before a letter...

can someone tell me what's the physical system of Henon and Ikeda attractor?? or tell me some web side about this, because i need to do an assignment:wink: thank you!

Hi all, maybe this is not the proper forum to post this. Because it rather belongs into a section 'strange effects in everyday life', or whatever. Well. Yesterday I opened a bag of peanuts. The ones that have the closed shells which contain two nuts each. I found the best way to crack them...

Strange Sun-like Object... Any Ideas? A few days ago, my family and I were stuck in a traffic jam on the expressway about an hour before sunset. There were no clouds in the sky and my sister pointed out what appeared to be a small sun a quite a bit to the southeast of the larger one. I have...

What do people make of the following quote, attributed to Kissinger? It reminds me of Ronald Reagan's comments regarding an extraterrestrial threat to Earth(which he made at the UN, around about the same time as this). "Today, America would be outraged if U.N. troops entered Los Angeles to...

According to SR, a photon has an equivalent mass of h / c λ where h is plank's constant, c is the speed of light, and lambda is the photon's wavelength. So, at some point the equivalent mass of the photon should be sufficient to cause a black hole. (Using the simplified formula I...

i was playing with numbers the other day and noticed this - Anything multiplied by 9, will equal 9 when added this is really weird considering that it doesent work with any # i know this belongs in the math forums, but using physics could generate a good theory, it may be stupid but...

http://www.kansascity.com/mld/kansascitystar/living/special_packages/starmagazine/6693767.htm

"There is no place like Mars for fueling speculation about geologic features that must have been created by intelligent beings. Now scientists bring us the Fortune Cookie photo." http://www.space.com/imageoftheday/image_of_day_030731.html

f(x) = (1 - x^2)^1/2 This all stems from me approximating pi by numerically evaluating the integral S f(x)dx from 0 to 1 and multiply the sum by 4. Now... Would you agree that f(x) has a derivative f'(x) = (1 - x^2)^-1/2 * -2x ? According to my textbook this is so. Now I can...

Not quite sure where this post should go so I'm putting it here. My wife and I were walking the dog the other night and looking toward scorpio we saw a flash of light and then a very broad "vapor trail" like a glowing stripe crossed upwards across the sky. We walked on further and about five...

So I came across a question in a quiz book the other day and I still haven't been able to answer it, so I figured I would ask some experts... Here goes... As a NASA senior physicist, would you agree with the calculation made by a junior physicist regarding the speed of an artificial...

http://news.bbc.co.uk/2/hi/science/nature/2983298.stm

1/7 = 0.142857142857[/color]... 2/7 = 0.2857[/color]14285714[/color]... 3/7 = 0.42857[/color]1428571[/color]... 4/7 = 0.57[/color]1428571428[/color]... 5/7 = 0.7[/color]14285714285[/color]... 6/7 = 0.857[/color]142857142[/color]... That's strange.

For you statisticians out there, I have long wondered about the possibility of evaluating the "truth" of personal claims by using statistical analysis. Considering the incredible success of demographics and other fields, might this also be possible. If you look at my other threads you will...