Science & Mathematics - 19 July 2007

what does this mean?
" recognize compounds as pure substances which may be broken down into elements by chemical means"

2007-07-19 06:00:14 · 4 answers · asked by having mixed feelings 3 in Chemistry

Why clouds look white in colors sometimes, sometimes blackish, sumtimes gray. What is the reason behind this?

2007-07-19 05:59:28 · 6 answers · asked by fha_chafzeto 2 in Weather

im going to have a battle of the torches whos torch lastes longer no rules
heres my ideas use white birch torch http://www.wwmag.net/barktorc.htm
i made a small one on a stick it lasted 20 minutes so what can i do to make it better like adding stuff to it

p.s. i need a flamable item that burnes long no torch fluid
butan gas i can use

2007-07-19 05:58:50 · 3 answers · asked by Anonymous in Engineering

√(-4*-9)
how do i solve this? showing all steps will be very helpful for me to understand. thank you.

2007-07-19 05:58:49 · 2 answers · asked by jumba 1 in Mathematics

I was wondering if it is possible to use some type of craft to fire into orbit and then angle down to a place like Europe? I know the shuttle can reach orbit in like 8 minutes and up there it doesn't take much to travel at a high rate of speed. Of course, it would be expensive but couldn't we have some type of craft that just did this and then we could travel all over the world really fast???

2007-07-19 05:58:12 · 10 answers · asked by Layne100 2 in Astronomy & Space

2007-07-19 05:57:21 · 16 answers · asked by Anonymous in Engineering

2007-07-19 05:54:26 · 3 answers · asked by poonam 1 in Chemistry

how do you do these??

1.(1/2){ln (x^2) - ln y^4}
2.ln c - 2ln d

2007-07-19 05:51:40 · 3 answers · asked by lushay 2 in Mathematics

I've read so many different thing! Are they dead koala's?Or vicious marsupials?Are they from a toxic eucolyptos tree or what?I appreciate any answers. Please DO NOT post pictures of them because from what I've seen on the net, they seem scary. Thanks!

2007-07-19 05:50:06 · 3 answers · asked by Anonymous in Zoology

I need the detailed info as a classroom interactive experience.

2007-07-19 05:48:42 · 3 answers · asked by Sharon B 1 in Chemistry

Since for metals as the temprature increases the resistivity decreases.

2007-07-19 05:45:41 · 7 answers · asked by Anonymous in Physics

Additionally, what is the difference between "t minus and counting" and "t minus and holding"?

2007-07-19 05:44:05 · 11 answers · asked by harrislapiroff 1 in Astronomy & Space

2007-07-19 05:41:37 · 4 answers · asked by Anonymous in Biology

What is the mass in an atom?

2007-07-19 05:39:38 · 10 answers · asked by fha_chafzeto 2 in Physics

I'm trying to figure out what ³√x^2 is but first what is ³√x?

2007-07-19 05:39:04 · 8 answers · asked by sky l 1 in Mathematics

Are there environmental concerns that arise as a result of the chemical process of cleaning? (If there are can you go into details)

Please Help me I really need it. If you give me the best answer you will get 10 points and a thumbs up. Please and Thank you.

2007-07-19 05:38:40 · 2 answers · asked by Anonymous in Chemistry

1>combustion in alkanes and alkenes equations.
2>action of bromine(in solvent) with alkanes and alkenes.
3>Action of bromine water with alkanes and alkenes.
4>Action of acidified potassium manganate(VII) with alkanes and alkenes.
5>Action of concentrated sulphuric acid with alkanes and alkenes.

5 euations are needed. thx

2007-07-19 05:38:11 · 3 answers · asked by mantoud 1 in Chemistry

Please give all important information related to it.

2007-07-19 05:37:55 · 3 answers · asked by fha_chafzeto 2 in Physics

..

Note: Cardinal Numbers: 1, 2, 3, etc., etc.,

2007-07-19 05:36:10 · 7 answers · asked by Anonymous in Mathematics

I need an explanation of perpendicular slopes. if a line that is slope is m, why is its perpendicular line slope -1/m ? Why is it oppisite or the reciprical?

2007-07-19 05:36:08 · 3 answers · asked by dnbozo 1 in Mathematics

of 12cm into the tree's trunk. What was the force exerted on the bullet in bringing it to rest?

2007-07-19 05:35:48 · 3 answers · asked by Anonymous in Physics

what is the agent that causes powder detergent to produce bubbles (foam) when mixed with water?

2007-07-19 05:33:58 · 4 answers · asked by Anonymous in Chemistry

2007-07-19 05:32:35 · 6 answers · asked by Anonymous in Chemistry

..

Cardinal Numbers: 1, 2, 3 etc etc

2007-07-19 05:32:08 · 6 answers · asked by Anonymous in Mathematics

2007-07-19 05:31:24 · 6 answers · asked by Anonymous in Chemistry

i want information regarding the number of subunits in the protein.

2007-07-19 05:30:07 · 2 answers · asked by vedarshya 1 in Biology

I am looking at a study maual and have come upon multiplication of fractions and i just cant remember how to do it. The fractions to multiply are 10/9*3/4*8/15. How do i do this. I know there has to be some reducing either vertically or diangonally but i dont know how. Can someone please explain this in detail.

2007-07-19 05:29:21 · 4 answers · asked by Lou 1 in Mathematics

2007-07-19 05:28:58 · 7 answers · asked by Anonymous in Chemistry

A sports goods store owner bought a quantity of basketballs for $750. Through a special discount from the manufacturer he is told he can get 10 extra basketballs and save $15 off the price of each ball while still spending $750.
Answer the following questions based on the above information:

What two variables is the original cost of $750 based on?

Write a let statement for each variable
Let x be………..
Let y be………..

Write an equation for the total cost of the balls after the manufacturers discount.

2007-07-19 05:27:24 · 3 answers · asked by Anonymous in Mathematics

2007-07-19 05:27:04 · 13 answers · asked by Anonymous in Astronomy & Space