Science & Mathematics - 21 December 2007

I believe that a 100% reduction means that you have nothing left, but others have said it cuts it in half. To me that math doesn't add up, since half=1/2=.5 and .5 is the same as saying 50%...therefore, a cut in half cannot be a 100% reduction.

2007-12-21 13:04:52 · 6 answers · asked by Wesley S 1 in Mathematics

2007-12-21 12:56:53 · 5 answers · asked by chacha 2 in Physics

2007-12-21 12:48:09 · 4 answers · asked by John 1 in Other - Science

1. do all solutes dissolve to the same extent in the same solvent? how do you know

2007-12-21 12:48:03 · 4 answers · asked by xoxo§kailey§ 3 in Chemistry

Theres a whole load of new asteroids being discovered due to our (NASA) improved detection technology.

The odds have been recently cut of the asteroid hitting Mars from 350-1 to 75-1. It's not a massive asteroid... but if it hit London, then London would be wiped out good and proper - or any other major city.

-- Quote: The impact, however, would be tiny in comparison to that of the asteroid that struck Chicxulub in Mexico 65 million years ago, which caused a worldwide cataclysm that is thought to have wiped out the dinosaurs. The new asteroid is 100 times smaller than the 10km diameter rock that caused that event. --

How best to protect Earth from late detection of these new asteroids being discovered which may be on rapid collision course with Earth? Shouldn't we be making this a priority?

Lasers? Nukes?

2007-12-21 12:44:49 · 9 answers · asked by Joe Bloggs 4 in Astronomy & Space

2007-12-21 12:36:24 · 8 answers · asked by lollipop2eat2003 2 in Mathematics

the question asks us to calculate (i) the number of moles of CO2 produced.. (ii) the no. of moles of water produced.. (iii) determine the molecular formula of X..

how do u do this? u don't have to give the answer.. just guide and tell me the steps involved..

2007-12-21 12:35:02 · 2 answers · asked by Anonymous in Chemistry

54.9 g of solid aluminum hydroxide, Al(OH)3, is neutralized with 91.9 g of sulfuric acid, H2SO4.

a. Write a balanced equation of the reaction?

b. Which one is the limiting reagent?

c. How many grams of aluminum sulfate will be produced?

d. How much of the excess reagent(in grams) is left at the end of the reaction?

2007-12-21 12:34:40 · 1 answers · asked by Charlie W 1 in Chemistry

2007-12-21 12:32:41 · 7 answers · asked by lollipop2eat2003 2 in Mathematics

The difference of two positive numbers is 5 and the sum of their squares is 233. Which pair of numbers is the solution to this word problem?

a) The two numbers are 8 and 13.

b) The two numbers are 7 and 12.

c) The two numbers are 6 and 11.

d) The two numbers are 9 and 14

The length of a rectangle is 6 cm less than twice its width. Find the dimensions of the rectangle if its area is 108 cm2. Which equation can you use to solve this problem?

a) w(2w + 6w) = 108

b) w(2w – 6w) = 108

c) w(2w – 6) = 108

d) w(2w + 6) = 108

2007-12-21 12:31:45 · 5 answers · asked by Anonymous in Mathematics

2007-12-21 12:25:10 · 3 answers · asked by dennis d7377 1 in Geography

2007-12-21 12:21:19 · 11 answers · asked by liz k 1 in Mathematics

2007-12-21 12:12:35 · 1 answers · asked by helo 1 in Mathematics

2007-12-21 12:05:07 · 22 answers · asked by peter s 1 in Astronomy & Space

As a science-astronomy amateur, I would like to watch the Earth rotating (live) on my computer. I have tried many searches, but I haven't been able to find a live shot of our planet. Does this view exist? Websites to actual views will be rewarded.

2007-12-21 12:00:46 · 4 answers · asked by CatherineKU 2 in Astronomy & Space

What do you think?

Do you think there could be life or mabye other realations to humans on other planets in other universes if there is even any. Also, how do you think space was created...

2007-12-21 12:00:11 · 34 answers · asked by Anonymous in Astronomy & Space

http://infograffiti.org/story.php?title=EleMENTAL_Rod_Generator_-_free_energy

2007-12-21 11:59:38 · 4 answers · asked by jason h 2 in Engineering

I'm not that good in Math...please help me. I don't think my teachers explain it well.

Question-
Vertex angle A of isosceles triangle ABC measures 20 degrees more than 3 times angle B. Find angle C.

^ I don't understand! Please help

2007-12-21 11:59:35 · 3 answers · asked by someone 1 in Mathematics

I think that if humans never existed, than it would be a better place but at the same time i don't want to die. what do you think it would be like if we never existed.

2007-12-21 11:57:03 · 11 answers · asked by ▫□ █ ▄ ▀Square▀ ▄ █ □▫ 6 in Other - Science

4x -7- x=8
19=5x-4x+9
-68=6x+x+2
-6-4x-6x=54
x2-8x-20=0

2007-12-21 11:56:36 · 10 answers · asked by Long N 3 in Mathematics

i was watching the news i just missed what they all said about it i just want to no more about it if you have any info about it please tell

2007-12-21 11:55:41 · 5 answers · asked by Anonymous in Astronomy & Space

2007-12-21 11:53:35 · 5 answers · asked by Anonymous in Geography

2007-12-21 11:51:18 · 5 answers · asked by nightowl 2 in Mathematics

2007-12-21 11:40:53 · 21 answers · asked by Anonymous in Zoology

http://www.cnn.com/2007/TECH/space/12/21/mars.asteroid.ap/index.html?eref=rss_topstories#cnnSTCOther1

2007-12-21 11:40:42 · 9 answers · asked by Anonymous in Astronomy & Space

2007-12-21 11:40:34 · 4 answers · asked by Robert B 1 in Weather

making a large batch of acid/base indicator using canned blackberries- about a pint's worth, unknown molarity or composition

"juice" of this canned is what I used for indicator, I have so far filtered it and diluted it a little

my problem: when packaged some sort of sweater has been added, "light syrup". I'm guessing its either corn syrup or plain old sugar. I need to get rid of it without wasting much of the actual solution or spending much money. Any suggestions?

2007-12-21 11:38:16 · 1 answers · asked by Flaming Pope 4 in Chemistry

2007-12-21 11:37:14 · 16 answers · asked by Anonymous in Paranormal Phenomena

2007-12-21 11:29:13 · 2 answers · asked by jessejames2nice 1 in Physics

2007-12-21 11:24:01 · 11 answers · asked by Anonymous in Astronomy & Space