Science & Mathematics - 25 August 2007

i looked at some astronomy textbooks and they had quite complex looking calculations..im better with biology & chemistry except those subjects are soo boring but i love learning about space i think its really fascinating!!

2007-08-25 23:51:58 · 17 answers · asked by Anonymous in Astronomy & Space

I have not ask this question to be ridcueled or belittled I am just interested.

2007-08-25 23:51:48 · 5 answers · asked by SAMUEL 1 in Astronomy & Space

I have read Joseph swan from UK was the first.

2007-08-25 23:45:45 · 15 answers · asked by tops 1 in Engineering

2IO3- + 12H+ ---> I2 + 6H2O
2I- ---> I2

I have these two balanced chemical equations, in each of them I need to find which ions or molecules are:

1. being oxidized
2. acting as an oxidizing agent
3. acting as an reducing agent

I already know that the Hydrogen ions are not oxidized or reduced, just not really sure what happens with the other molecules and ions...
thanks

2007-08-25 23:29:30 · 1 answers · asked by Anonymous in Chemistry

2007-08-25 23:26:20 · 32 answers · asked by kissypuppys 3 in Zoology

having trouble, the answer should come out to 0.027... i keep getting 1.6

2007-08-25 23:16:24 · 5 answers · asked by Anonymous in Physics

what part of the atmosphere is very hot?

2007-08-25 23:13:45 · 4 answers · asked by Anonymous in Astronomy & Space

6X^2+7X-3=0

show work

i really need help

2007-08-25 22:52:41 · 7 answers · asked by Anonymous in Mathematics

Solve the differential equation.

e^x dy/dx + 4e^x y = 3, x > 0

cos x dy/dx + y sin x = sin x cos x

2007-08-25 22:39:51 · 6 answers · asked by Anonymous in Mathematics

Cubed the root of (x-2) to the power of 9

2007-08-25 22:38:53 · 2 answers · asked by Angeli P 1 in Mathematics

*Write down a differential equation to describe the following situations :

a) A pie just been taken out of the oven. The rate of decrease of the temperature T of the pie is proportional to the difference between T and the temperature T of the surrounding air.

b)John's water supply is stored in an upright cylindrical tank. Unfotunately the tank has developed a small hole in its base and water is leaking out at a rate proportional to the square root of the volume of water remaining.

2007-08-25 22:29:34 · 2 answers · asked by fashaleviana 1 in Mathematics

2007-08-25 22:27:46 · 2 answers · asked by Anonymous in Zoology

Find the value of x in these special triangles.

http://tinypic.com/view.php?pic=4uwrh37
(Click on the link, once it pops up, click on it again to make it big.)

Please help me! I can't figure these out for anything! It's driving me crazy. Thank you!

2007-08-25 22:23:16 · 6 answers · asked by Randy M 1 in Mathematics

2007-08-25 22:10:43 · 3 answers · asked by Tina 1 in Zoology

2007-08-25 22:08:02 · 11 answers · asked by sandeep r 2 in Zoology

A Projectile reached a maximum height of 50 meters and range from 285 meters. Determine its initial speed and inclination wherein it is fired.

what will I do to get the initial speed and the inclination?

how do I answer it? need help! how do you solve this?

2007-08-25 21:56:03 · 6 answers · asked by rachel is blue 1 in Physics

One force acting on a machine part is
F = (-5.00N)i + (4.00N)j.
The vector from the origin to the pouint where the force is applied is
r= (-4.50m)i + (1.50m)j.


a) Determine the direction of the torque using the right hand rule.
b) Calculate the magnitude of the torque produced by this force.
c) From the answer in b), what is the direction of the torque? (this must be in match with the answer in b))

2007-08-25 21:43:26 · 1 answers · asked by nadanilnone 1 in Physics

2007-08-25 21:36:29 · 16 answers · asked by Anonymous in Astronomy & Space

2007-08-25 21:21:58 · 11 answers · asked by Richard E 1 in Earth Sciences & Geology

I'm doing a biology project and I'm not sure what the affinity of nightcrawlers are.

I'm pretty sure the nightcrawlers I have are Canadian because I have to keep them in the refrigerator.

2007-08-25 21:10:13 · 6 answers · asked by shroudedinnightmares 2 in Zoology

2007-08-25 21:07:57 · 5 answers · asked by Anonymous in Weather

2007-08-25 21:02:49 · 3 answers · asked by akhil g 1 in Mathematics

it's for an astronomy lab that I really feel like a dumbass in.

2007-08-25 20:58:00 · 4 answers · asked by zuxozopi 1 in Mathematics

using - add, subtract, multiply, divide

2007-08-25 20:46:40 · 4 answers · asked by nandha 1 in Mathematics

Find the equation which x solves if x is the location of the minimum value of g(x) = (1/x) sin (pi*x) on the interval [1, 2].

Im not sure if this will help: Hint: consider g(3/2) and g'(3/2).

2007-08-25 20:39:51 · 1 answers · asked by DSS 1 in Mathematics

2007-08-25 20:37:01 · 2 answers · asked by Anonymous in Mathematics

2007-08-25 20:36:11 · 10 answers · asked by luvmyboys 2 in Astronomy & Space

i know it seems so simple but i need someone to please remind me how to solve this promblem. Please tell me how you solved this problem !!!!! tnxs!

2007-08-25 20:30:33 · 8 answers · asked by Anonymous in Mathematics

2007-08-25 20:23:24 · 6 answers · asked by stealth 4 in Earth Sciences & Geology

so this sun of ours has been burning for thousands of years, do you think that it was larger in size then and that it has gotten smaller over the years from burning away? is the sun in perpetual motion?

2007-08-25 20:19:23 · 13 answers · asked by z 1 in Astronomy & Space