Science & Mathematics - 31 July 2007

dont you think its weird when you lye down and look at the sky. You stare. All you see is sky or stars (if its night). Where does it end. It HAS to end somewhere... eventually it has too. It cant keep going, what do you think is at the end? But then whats behind that? ITS SO MIND BOGGLING!!! Does anyone else feel disorientated when you think about this kinda stuff?

2007-07-31 10:57:26 · 13 answers · asked by Anonymous in Astronomy & Space

Why do some people persist in giving really quite exceptionally long answers to the briefest of questions when they're clearly not required and their answers are really monotonous and boring to read, why don't they make their answers snappy and concise and to the point when all we want to know is the answer in a couple of words and not their synopsis of 'war and peace' on the subject in hand, do they think they are being smart in giving overdetailed answers and are they showing off a bit as I suspect or are they under the impression that the person asking the single line question is really interested in their inane ramblings and indeed has the patience and inclination to read their long winded and sometimes overcomplicated ( and therefore not really answering the question ) opinion or answer to the question at hand, bearing in mind that scrolls and scrolls of text on these pages are not the most exciting thing to read especially if you are only after a short and to the point answer to

2007-07-31 10:55:18 · 26 answers · asked by threk the shird 1 in Earth Sciences & Geology

I'm interested in the process.
The motor in question is for the sink on a motor home.
I'm not interested in using the manufacture's recommendation.

2007-07-31 10:54:20 · 7 answers · asked by EASTERN H 1 in Engineering

2007-07-31 10:50:23 · 23 answers · asked by Anonymous in Astronomy & Space

simplify question 1) -5x^(-1) + 2y^(-1) over 9x^(-2) -7y^(-2) question 2) (1/x+2)+(4/x-3) over (2/x-3)-(7/x+2) solve the equation question3) (4/x+5)-(6/x-5)=(2/x^2-25) question 4) (8/2x^2+8x)=1-(1/x+4)

2007-07-31 10:47:49 · 4 answers · asked by Jim 2 in Mathematics

2007-07-31 10:47:16 · 4 answers · asked by j-man 1 in Chemistry

If I put a balloon full of air into a bucket of hot water, would the circumference get larger or smaller? Why?

And what about if I put it in a bucket of ice water, what would happen?
And why??????

Could you pleasssse help me?! Thanks so much and I will choose a best answer ASAP!!!!!!!!!!!!!!!!!!! =)

2007-07-31 10:46:01 · 2 answers · asked by louierockyjim 2 in Physics

This question is just a 1 or 2 word answer, and I'm confused whether it's a trick question or not.

Which type of formula, empirical or molecular, can be obtained from elemental analysis that gives percent composition?

I saw an example in my textbook that shown me how to get the empirical formula from the percent composition, and from that answer, it was able to obtain the molecular formula. So what's the answer? It says "or" in the question, but then again, it might be a trick question.

2007-07-31 10:40:46 · 5 answers · asked by Andrew 2 in Chemistry

This is a very cool and hard question and in know it.Anyway no cheating.

2007-07-31 10:40:28 · 4 answers · asked by samand 1 in Mathematics

Does anybody know a formula to figure out the following: Say I wanted to take a picture of a wall that is 100 feet in width and in length. How many feet away from the wall would the camera have to be to capture he entire wall???

I obviously could measure the distance with a long measuring tape once I found my self in a position where the entire wall was in the picture, but my goal is to find the formula for the problem.


Thank you for your help.

2007-07-31 10:36:15 · 3 answers · asked by Mike B 2 in Mathematics

how do i figure out how much money i would save by doing that???

2007-07-31 10:35:06 · 3 answers · asked by Anonymous in Other - Science

Need help!

2007-07-31 10:34:47 · 5 answers · asked by Israel R 2 in Medicine

What is the average height for a tsunami, e.g. 200 m, 249 m, etc. and the average diameter for a hurricane e.g. 500 miles, 900 miles, 401 miles? Thanks for the help....

2007-07-31 10:27:58 · 0 answers · asked by Intelligence 2 in Weather

Its an aptitude question. please solve it. its answers is 7 and half hour (it can be wrong, but very less chance). But my answer is 6 and Quarter hour. plz give a solution with all the steps u taken to solve it.

2007-07-31 10:23:27 · 7 answers · asked by Lolla 2 in Mathematics

Need Help!

2007-07-31 10:21:56 · 3 answers · asked by Israel R 2 in Medicine

If <1 is supplementary to <2 and <3 ~= <1, prove AD II BC.

this is the picture for the question.
http://aycu14.webshots.com/image/23453/2003993084943664995_rs.jpg

2007-07-31 10:09:15 · 2 answers · asked by Anonymous in Mathematics

Pretty much what the question asks, my chemistry book doesn't explain it and I want to know WHY.

2007-07-31 10:05:01 · 1 answers · asked by floridaguy 1 in Chemistry

2007-07-31 09:59:57 · 5 answers · asked by tcrawford911 1 in Botany

A rocket accelerates by burning its onboard fuel, so its mass decreases with time. Suppose the initial mass of the rocket at liftoff (including its fuel) is m, the fuel is consumed at rate r, and the exhaust gases are ejected with constant velocity ve [v followed by little e] (relative to the rocket). A model for the velocity of the rocket at time t is given by the equation below where g is the acceleration due to gravity and t is not too large.

v(t) = -gt - ve ln((m-rt)/m) [that's v then little e]

If g = 9.8 m/s2, m = 30000 kg, r = 160 kg/s, and ve = 3000 m/s, find the height of the rocket one minute after liftoff.

Ok, any ideas on where to start...? Dont you just plug in?

2007-07-31 09:56:50 · 4 answers · asked by Anonymous in Mathematics

I'm not religious, but today, I was thinking about how amazing it is that everything seems to know everything else. Like, before bees evolved enough to see ultraviolet, how did they/their bodies know that plants have UV marks on them in the first place? How do animals know their predators so well that they can develop such effective defenses? How does Science seem to know everything about itself, when most of it is inanimate and apparently not even aware of it's own existance?

2007-07-31 09:49:28 · 8 answers · asked by Anonymous in Other - Science

2007-07-31 09:47:23 · 12 answers · asked by Delilah 2 in Mathematics

Let X and Y be metric spaces and let A be a subset of X. Suppose f:A-->Y is continuous on A and has a limit at every limit point of A. Show that f has a unique continuous extension to the closure of A.

Thank you

2007-07-31 09:43:32 · 3 answers · asked by Sonia 1 in Mathematics

Hello:
Could somebody explain me what is the difference (if any) between a chaotical behaviour and a random behaviour? What I know is that, for example, a butterfly path is chaotic, also, the path of the smoke of a cigarette, and the diffusion of a drop of ink in a glass of water, because in all these cases you can't predict how the particles (or objects) will move. That seems to be random, isn't that? Thanks

2007-07-31 09:42:13 · 1 answers · asked by Anonymous in Other - Science

builder question

2007-07-31 09:42:03 · 6 answers · asked by fwconnage@talk21.com 1 in Engineering

You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and parallel to the track is a wall that slopes upward at a 12° angle with the horizontal. As you face the window (0.85 m high, 1.8 m wide) in your compartment, the train is moving to the left, as the drawing indicates. The top edge of the wall first appears at window corner A and eventually disappears at window corner B. How much time passes between appearance and disappearance of the upper edge of the wall?
___ s

2007-07-31 09:39:13 · 1 answers · asked by Antonio E 1 in Physics

2007-07-31 09:34:58 · 5 answers · asked by dronebee91 2 in Physics

i just need to know how to work it and solve it. plx help ^^

2007-07-31 09:29:28 · 5 answers · asked by Anonymous in Mathematics

the molaroty on NaCl in 6.25M. The density of the solution is 1.34g/ml or kg/l. Calculate the Molality

The molality of NaCl is 0.125m, the density of the solution is 1.08g/ml or kg/l. Calculate the molarity

2007-07-31 09:29:25 · 1 answers · asked by ... 3 in Chemistry

If the appollo spacecrafts were, in places, just the thickness of foil, then howcome the vacuum of space didn't pull them apart?

2007-07-31 09:28:52 · 12 answers · asked by vEngful.Gibb0n 3 in Astronomy & Space

I am good at doing indirect proofs,with geometric figures,but this kind of problems always confuse me. So plzz help me out.


Use an indirect proof to show that John exceeded the 55 mph speed limit if he left his house at 8:15 a.m. and arrived at his office 60 miles away at 9:00 a.m. Write the proof using paragraph method.

2007-07-31 09:25:11 · 4 answers · asked by |||(-_-)||| 2 in Mathematics