Science & Mathematics - 11 January 2007

2007-01-11 06:00:56 · 10 answers · asked by peterose9999 1 in Zoology

In October I was in Portugal, where the water is hard i think and my facecloth (which was origionally beige) started to turn orange, how did this happen?

2007-01-11 05:58:44 · 6 answers · asked by James D 2 in Chemistry

this is because.....?

2007-01-11 05:58:35 · 5 answers · asked by vampire_kirstyseaden 1 in Other - Science

like attaching a cable or a tube from a point on earth anchored to the ground and linked to a geo-stationery satellite in space and then we could have them sent up in a vaccuum

2007-01-11 05:58:00 · 6 answers · asked by Anonymous in Astronomy & Space

2007-01-11 05:55:37 · 3 answers · asked by Anonymous in Astronomy & Space

2007-01-11 05:52:41 · 5 answers · asked by angelsweetiemoongirl 3 in Chemistry

These two numbers are in percentages and are the sample variance of two different catagories what can we include by comparing the two?0.1570.067

2007-01-11 05:51:41 · 2 answers · asked by M.K 2 in Mathematics

I spent 100 dollars to buy 7 pounds of flour and 8 pounds of sugar (I
own a bakery) yesterday. Last month I spent 30 dollars to buy 2 pounds
of flour and 4 pounds of sugar. But I do not know how much a pound of
each ingredient (x for flour, y for sugar) costs.
100=7x+8y, 30=2x+4y (60=4x+8y)
Solution: 40=3x, x=40/3 dollars/pound, y=(100-7 40/3)/8 d/p


What is the solution to this system....

2007-01-11 05:50:45 · 5 answers · asked by Bill B 1 in Mathematics

2007-01-11 05:47:14 · 6 answers · asked by Katie D 1 in Geography

2007-01-11 05:47:08 · 2 answers · asked by Anonymous in Mathematics

Triangle with x as adjacent, 8 as hypotenuse, and no number for opposite . the angle is 40 and there is a right angle. how do i calculate x using sin cos or tan? i am using a scientific calculator so can u please tell me what buttons on it to press?

2007-01-11 05:46:20 · 8 answers · asked by Anonymous in Mathematics

2007-01-11 05:45:50 · 3 answers · asked by lil chris 1 in Engineering

1 tenth of a foot is 1 ?/? inches

2007-01-11 05:45:07 · 3 answers · asked by jay s 1 in Mathematics

Is it ok to run the tap while you clean your teeth now?

2007-01-11 05:43:01 · 17 answers · asked by Anonymous in Engineering

If so, why? And, that's pretty cool when you think about it.

2007-01-11 05:42:44 · 13 answers · asked by Anonymous in Biology

that they'll evolve into humans, and we'll evolve into something else??

2007-01-11 05:39:05 · 32 answers · asked by Anonymous in Biology

IPC Class -10th Grade/Using Holt Science Spectrum & in Chapter 7 Section 2. About Nuclear Fission and Fusion.

Please Help!

2007-01-11 05:37:15 · 2 answers · asked by Matt D 1 in Physics

2007-01-11 05:36:19 · 3 answers · asked by brianna0593 1 in Weather

IPC Class -10th Grade/Using Holt Science Spectrum & in Chapter 7 Section 2. About Nuclear Fission and Fusion.

Please Help!

2007-01-11 05:35:36 · 3 answers · asked by Matt D 1 in Physics

Whenever quantities of two or more reactants are given in a stoichiometric problem, you must identify the moles. This is the reagent that is completely _____ in the reaction.

( Fill in the blank. )

2007-01-11 05:33:57 · 3 answers · asked by Anonymous in Chemistry

if i have 3 series circuits all with an ammeter and a voltmeter over the bulbs. in the 1st circuit there is 1 bulb , in the 2nd there are 2 and in the 3rd there are 3 bulbs.

as i added more bulbs to the circuits the resistances incresed why is that?

2007-01-11 05:33:04 · 10 answers · asked by vampire_kirstyseaden 1 in Other - Science

If starlight left a galaxy ten billion years ago, how did we arrive out here ahead of that light to pick it up? The big bang must have taken place when we were already sitting out here on Earth.

There's is something I'm not getting.

But ten billion years ago there was no sun and no earth to orbit it. So how were those ten billion years measured?

Thanks,
Vince

2007-01-11 05:29:44 · 13 answers · asked by delivery boy 1 in Astronomy & Space

2007-01-11 05:26:52 · 22 answers · asked by LittleLady 3 in Mathematics

a.H2O ----> H2 + O2

b. NaCl + H2O

c. Fe + S ----> FeS

d. CaCo3

e. 3P4 + 10 KClO3 ----> 10 KCl + 6P2O5

f. H2SO4 + Al ----> Al2(SO4)3 + 3H2

I have been trying to solve them for homework, but I just can't get them right. Can someone explain how to solve these for me?

Thanks in advance!

2007-01-11 05:26:30 · 6 answers · asked by C. 2 in Chemistry

2007-01-11 05:25:36 · 10 answers · asked by AARON B 1 in Weather

2007-01-11 05:23:45 · 5 answers · asked by Janu 4 in Biology

Find and simplify (a) the sum
and (b) the product of the given monomials
^^what does the mean?^^

(3x^3)^2, (2x^2)^3

2007-01-11 05:22:30 · 11 answers · asked by James A 1 in Mathematics

The answer is 141 m/s. The equation used is t=v2d/g. I have a quiz this evening, and I can't seem to figure out how they arrived at the answer using this equation. (the book does not show the equation in action). 5 points to the first person who can show me how this is worked.

2007-01-11 05:21:30 · 3 answers · asked by micropterushunt 2 in Physics

x (times) x (divided) x =?

first x is inside a radical root of 4
second x is inside a radical root of 3
third x is inside a radical root of 6

2007-01-11 05:21:23 · 3 answers · asked by Anonymous in Mathematics

Why, even though some serious weather can cause catastrophe do some of us love it so much? I.e, "wow, id love to see a tornado." No matter of the consequences.

2007-01-11 05:20:20 · 4 answers · asked by ? 5 in Weather