Science & Mathematics - 12 November 2006

2006-11-12 18:16:10 · 11 answers · asked by hln_mcgwn 1 in Astronomy & Space

You knew this question was coming, right?

2006-11-12 18:15:07 · 12 answers · asked by x 5 in Weather

2KClO3(s) → 2KCl(s) + 3O2(g)



What volume (ml) of O2 is collected over water at 22.0 oC by the reaction of 0.274 g of KClO3 if the barometric pressure is 726.2 mm Hg
The vapor pressure of water at 22.0 oC is 19.8 mm Hg.

2006-11-12 18:11:24 · 1 answers · asked by Mononkeneo 1 in Chemistry

2006-11-12 18:10:24 · 2 answers · asked by Anonymous in Zoology

2006-11-12 18:05:04 · 6 answers · asked by masrath r 2 in Biology

By chair, I mean the standard arm-chair.

2006-11-12 18:03:49 · 12 answers · asked by thipsuda4 1 in Engineering

Mr. Sprout built a fence around his garden so it formed a square with ten fence posts on each side. How many fence posts did he need?

2006-11-12 17:59:21 · 7 answers · asked by Anonymous in Mathematics

Or at least what we think god is? To aliens are we just like cows they are farming for some 'Alien Hamburgers'?

2006-11-12 17:59:01 · 15 answers · asked by Sean S 1 in Astronomy & Space

I have been seeing these little bugs in my apartment in the cabinets and on my notebook paper. they are really really small and they are a tannish sort of color.

2006-11-12 17:58:34 · 3 answers · asked by nicklocke03 1 in Zoology

Ok, so now i get how to do that whole 'Xn+1=Xn-f(x)/f'(x)' part of Newton's Method...but Im having trouble with finding a 'general rule for approximating the radical' when given the other info...

x=sqrt(a) [Hint: f(x)= x^2 - a ]
-------------I came up with (Xn^2+a)/(2Xn)

but now im not sure how to use this new function to approximate the sqrt(7) to three decimal places...help anyone?

2006-11-12 17:56:38 · 2 answers · asked by Sir Excalibur 2 in Mathematics

The flywheel of a steam engine runs with a constant angular speed of 300 rev/min. When steam is shut off, the friction of the bearings stops the wheel in 2.5 h.
(a) What is the constant angular acceleration, in revolutions per minute-squared, of the wheel during the slowdown?
b) How many rotations does the wheel make before stopping?
(c) At the instant the flywheel is turning at 75 rev/min, what is the tangential component of the linear acceleration of a flywheel particle that is 50 cm from the axis of rotation?
(d) What is the magnitude of the net linear acceleration of the particle in (c)?

2006-11-12 17:56:04 · 3 answers · asked by Shane H 2 in Physics

When running a linear regression between Degree of Urbanization and the Ranking of a country on the Human Development Index the result is that there is a "__________?????" relationship (R-squared = 0.51). This means that 49% of the variance of Human Development Index Ranking is not explained by the variance in the Degree of Urbanization. Meaning that being highly urbanized doesn’t necessary relate to or mean that a country will Rank higher on the Human Development Index.

Can someone please verify my logic behind my statistical claim and identify the meaning of R²=0.51? I want to fill in that blank.

2006-11-12 17:55:25 · 1 answers · asked by Chizzo n 1 in Mathematics

This is for extracting various alcohols and water from a solution without having to maintain the solution at a very high temperature. I think it might be less energy intensive this way, but I have no data on energy needed to maintain a vaccum. What is the wattage on some of the pumps able to do this? Could it be cost prohibitive compared to just boiling at full temp?

2006-11-12 17:54:39 · 3 answers · asked by Brian L 4 in Chemistry

Just to remind you: its that movie where something is wrong with the planet's interior so a bunch of scientists travel inside the Earth to fix the problem. This movie is just full of bad science. In your opinion, what is the most implausible part?

2006-11-12 17:50:11 · 4 answers · asked by Link 5 in Earth Sciences & Geology

2006-11-12 17:46:38 · 7 answers · asked by tea4me627 2 in Astronomy & Space

2006-11-12 17:46:18 · 3 answers · asked by Steven A 1 in Engineering

Yes, I'm aware that the laws of thermodynamics say that perpetual motion machines are impossible, but just imagine that some mad scientist miraculously invents one. What could such a machine be used for? Also remember that perpetual motion machines come in two types... 1. ones that just run forever with 100% efficiency and... 2. ones that are more than 100% efficient (they basically create energy from nothing) What would be some practical uses for both types? Use your imaginations! :)

2006-11-12 17:45:58 · 3 answers · asked by Link 5 in Physics

2006-11-12 17:45:56 · 3 answers · asked by rtjackson4 2 in Mathematics

What does this mean? I can wake up in the middle of the night or first thing when I wake up, (if soemtimes I sleep late, like 10:10 or 11:11. Also, I often go to tthe store and my total will ring up the same amount like $23.23, or otherwise I get the same amount of change back, like $7.77, weird hey? One day, I went to two different stores and my total was exactly the same. WHY? It creeps me out.

2006-11-12 17:33:32 · 10 answers · asked by moreblondforyou 2 in Mathematics

72 a = 2 x (27 a)

what base is (a)?

Binary code is base 2, so what is a?

2006-11-12 17:28:43 · 4 answers · asked by oger1901 1 in Mathematics

2006-11-12 17:19:32 · 9 answers · asked by Sean S 1 in Biology

Can everyone please give me any infomation about nanotechnology and any examples of nanotechnology. No restrcition for any kind of infomation given. thank you

2006-11-12 17:15:57 · 4 answers · asked by ;cherish v_ 2 in Engineering

2006-11-12 17:15:34 · 14 answers · asked by Sean S 1 in Astronomy & Space

if a milkman has two 40 litre can's and one 5 litre can and one 4 litre can. How can he fill 2 litre each in 5 litre and 4 litre cans?........ and he has nothing else thing to measure milk quantity...

2006-11-12 17:14:47 · 6 answers · asked by parwan005 1 in Mathematics

Is there any easiest way to solve probability problem than draw tree diagram?

2006-11-12 17:09:46 · 3 answers · asked by star123 2 in Mathematics

2006-11-12 17:04:05 · 5 answers · asked by - ѕoичтα. ☮ 4 in Geography

2006-11-12 17:03:47 · 8 answers · asked by ricky ricardo 1 in Zoology

the said medicine is for pregnant women..

2006-11-12 17:03:03 · 2 answers · asked by belle25 1 in Medicine

What direction of shift is expected with an endothermic reaction when heat is removed by decreasing the temperatur of the system?
--->
heat + A + B <--- C + D

2006-11-12 16:58:30 · 3 answers · asked by femylatina 1 in Chemistry

I'm was just wondering what traits...physical or otherwise...that an intelligent life form would need to have. Just some examples to get you thinking. Are hands necessary? Is bilateral symmetry?

2006-11-12 16:57:54 · 4 answers · asked by Link 5 in Biology