Science & Mathematics - 24 August 2007

Find the general solution to:

2*t*y'+ 4*y = 3...

I feel so silly not even remembering where to start on something like this.

2007-08-24 06:32:39 · 2 answers · asked by Sarah G 1 in Mathematics

In the chapter where he discusses singularity, and the "big bang" -- just what "God" is he referring to loosely, in the first chapter? What context is he using it in? It just surprises me that a man of science, particularly, Hawking would use that word...

"One can imagine that God created the universe at the instant of the big bang" p. 9, Ch. 1

2007-08-24 06:31:36 · 10 answers · asked by Anonymous in Physics

make houses expansive to buy

pervent gutters from rusting

repel insects

keep leaves and other debris from sticking

none of the above?

2007-08-24 06:31:20 · 5 answers · asked by fuffy6yrfy d 1 in Chemistry

The reaction rate between ozone and nitrogen dioxide at 231 K is first order in each:

2 NO2 (g) + O3 (g) -> N2O5 (s) + O2 (g).

The rate law for the reaction is ???

2007-08-24 06:29:55 · 3 answers · asked by Ginger 1 in Chemistry

i need help and fast i need to know how to solve this

2007-08-24 06:28:40 · 2 answers · asked by Kahra K 1 in Mathematics

4x^2y^5/12x^3y^2z^-3 how do i simplify that. i know its something witht he exponents biut i forget what to do with them. thanks.

2007-08-24 06:26:40 · 4 answers · asked by Anonymous in Mathematics

It seems like every other month there's some fascinating story about new, and exotic ocean creatures being discovered ...along the North Atlantic.. or in rain forests in the Amazon...or wherever ...

Does this convey a sense of hope? OR Could it be just that these animals have always existed in seclusion and peace without no one disturbing them.... until NOW? Do They face a similar fate as all other creatures now..

2007-08-24 06:23:49 · 11 answers · asked by Anonymous in Zoology

http://i11.tinypic.com/4kp7i0x.jpg

http://i14.tinypic.com/6fajqmp.jpg

2007-08-24 06:23:47 · 5 answers · asked by Anonymous in Zoology

2007-08-24 06:22:23 · 3 answers · asked by Anonymous in Other - Science

http://img120.imageshack.us/img120/5537/treeyo9.jpg

2007-08-24 06:19:06 · 3 answers · asked by Anonymous in Botany

A veterinarian has 100 ft. of fencing to construct 6 dog kennels by first building a fence around a rectangular region, and then subdividing that region into six smaller rectangles by placing five fences parallel to one of the sides. Express the total area, A, of the kennels as a function of x, where x is the length of one of the seven parallel fences.

2007-08-24 06:18:48 · 6 answers · asked by Anonymous in Mathematics

2007-08-24 06:14:38 · 2 answers · asked by princesscotriana 1 in Biology

2007-08-24 06:14:22 · 6 answers · asked by lolliepop 2 in Earth Sciences & Geology

Also what were the effects of the earthquake?
thanks

2007-08-24 06:13:36 · 5 answers · asked by Anonymous in Earth Sciences & Geology

2007-08-24 06:13:36 · 6 answers · asked by Anonymous in Physics

2007-08-24 06:13:12 · 9 answers · asked by Anonymous in Mathematics

so i have this summer assign ment and this is one of the two questions i just cant seem to remember. simplify. give answers in positvie exponents. d^-4e^2f^2 thansk so much for your help.

2007-08-24 06:12:31 · 5 answers · asked by Anonymous in Mathematics

so i have a math summer assignment and i cant figure this question. Simplify 2m^3 over 3n^2 thanks soo much for all of your help, some stuff i just cant remember

2007-08-24 06:08:37 · 8 answers · asked by Anonymous in Mathematics

imagine theres a horizontal planeA bove which the effects of gravity are not felt. any object above the plane just floats and gravity has no influence on it.
now take a chain(for e.g:made of small steel ring) of length hundred metres above the planeA and arrange it so that its in a heap just above the planeA. but take care the chain is not entangled and should be easy to stretch along its length.

now pull the lower end of the thread below the planeA and the chain runs down like a single thread and hits the ground and as links pull down on the ones they are linked to , the whole length of the chain will run like a thread and hit the ground in some time. now take planeA is 20metres above the ground surface. the terminal velocity of links when they hit ground will be around 14 metres .
now consider hundred metres of the chain weighs 100 units. the potential energy of the chain just above the planeA will be m*g*h =100 *9.8*20
=19600 units.

2007-08-24 06:07:58 · 3 answers · asked by balaji.k 2 in Physics

A definite amount of solvent can hold a fixed amount of solute at room temperature. A solution that cannot dissolve any more solute is said to be?

unsaturated

supersaturated

full

sturated

in disequilibrium

2007-08-24 06:06:05 · 4 answers · asked by fuffy6yrfy d 1 in Chemistry

Hmmm ?

2007-08-24 06:04:03 · 9 answers · asked by jwburton3 3 in Astronomy & Space

NaCI and HCI

NaOH and H2O

HCI and NaOH

H2O and NaCI

NaOH and CIOH

2007-08-24 06:01:50 · 7 answers · asked by Anonymous in Chemistry

2007-08-24 06:00:59 · 3 answers · asked by Anonymous in Astronomy & Space

How would you factor the following?

3xˆ2 - 48???

2007-08-24 06:00:25 · 10 answers · asked by Anonymous in Mathematics

i am going to be enrolled in a 3 year science research class in my highschool. i was wondering if anyone has interesting areas of research. my first choice was testing the effects of cannabinoids on multiple sclerosis, but medicinal marijuana is illegal in NY. i am really interested in the central nervous system, but anything that deals with science would work.

2007-08-24 06:00:18 · 2 answers · asked by sam m 3 in Other - Science

acid ions

weak acid

srtong acid

organic acid

mineral acid

2007-08-24 05:59:06 · 7 answers · asked by Anonymous in Chemistry

what are orbs b/c i think i saw some in my video tape in night vision

2007-08-24 05:58:08 · 8 answers · asked by cutie 3 in Paranormal Phenomena

there are more OH ions than H ions

there are more H ions than OH ions

litmus turns red

there are equal numbers of H amd OH ions

litmus turns red

2007-08-24 05:56:56 · 6 answers · asked by Anonymous in Chemistry

a sheet of aluminum foil has a total area of 1.000ft^2 and a mass of 3.380g. what is the thickness of the foil in millimeters? (density of Al=2.699 g/cm^3).

2007-08-24 05:53:44 · 4 answers · asked by Anonymous in Chemistry

Is there anything i can use to stop my sword from rusting that could be found around the house? I know most people use oils but im guessing vege, sunflower oil is completely different.

2007-08-24 05:52:03 · 7 answers · asked by dean v 2 in Engineering