Science & Mathematics - 20 January 2007

2007-01-20 09:47:11 · 1 answers · asked by Melanie R 1 in Medicine

Simplifying Algebraic Expressions:
1. x/3+2x
2.5a-3/2a
3. -a-a/2

2007-01-20 09:44:45 · 1 answers · asked by Anonymous in Mathematics

2007-01-20 09:44:24 · 6 answers · asked by Anonymous in Astronomy & Space

When you want to pull downward to lift something, the main advantage of passing a rope upward and through a single pulley, rather than just up over the branch of a tree, is that the pulley

a. generates some of the force for you
b. changes the pulling direction
c. makes the rope stronger
d. reduces friction

2007-01-20 09:43:55 · 2 answers · asked by Needs_help 1 in Physics

bored and a complete science geek! and i really NEED to know
and be serious dont say that monkeys will start to understand wind and with the help of tree frogs rulle the world!!!! be serious please!!!! : )

2007-01-20 09:43:08 · 2 answers · asked by Anonymous in Weather

which is more tough? and how tough? if i'm not good at design which is more suitable for me? is design also a major subject in CE? tnx

2007-01-20 09:42:40 · 5 answers · asked by thirteen 1 in Engineering

2007-01-20 09:42:36 · 1 answers · asked by mike.roan@btinternet.com 1 in Chemistry

The $75 cost of a pizza party was to be shared equally by all those attending. Since five more people attended than was expected, the price per person dropped by $0.50. How many people attended the party?

2007-01-20 09:41:46 · 5 answers · asked by mike 1 in Mathematics

That everything really is actually repeated and will be repeated?

2007-01-20 09:41:42 · 9 answers · asked by Source 4 in Astronomy & Space

If you know ANY courses or placements, please tell me.

Thanks

2007-01-20 09:41:04 · 10 answers · asked by petzneo 2 in Medicine

what is the ratio? male:female....
>when you were still in college<

2007-01-20 09:39:46 · 3 answers · asked by thirteen 1 in Engineering

Suppose a 1.82 g nugget of pure gold has zero net charge. What would be its net charge after it has 1% of its electrons removed?

2007-01-20 09:39:39 · 1 answers · asked by nt 2 in Physics

log(base2)(x-1) -4 = -log(base2)(x+5)

help! How do i solve this? Thank you! :)

2007-01-20 09:35:40 · 3 answers · asked by Chazzy 3 in Mathematics

2007-01-20 09:28:31 · 9 answers · asked by T 4 in Other - Science

I have a guineapig, sometimes he chatters his teeth.....

2007-01-20 09:28:30 · 3 answers · asked by Anonymous in Zoology

2007-01-20 09:26:13 · 2 answers · asked by Anonymous in Mathematics

Potassium ions enter cardiac cells through which of the following mechanisms?
A. osmosis
B. diffusion
C. active transport
D. facilitated diffusion

2007-01-20 09:25:28 · 4 answers · asked by brian 1 in Biology

2007-01-20 09:24:35 · 2 answers · asked by Anonymous in Engineering

2007-01-20 09:21:01 · 3 answers · asked by cgaringer 1 in Mathematics

(a) What is the composition in mole fractions of a solution that has a vapor pressure of 43 torr at 20°C?
(b) What is the mole fraction of benzene in the vapor above the solution described in part (a)?

2007-01-20 09:19:56 · 3 answers · asked by magicalplaygirl 1 in Chemistry

(a) What is the composition in mole fractions of a solution that has a vapor pressure of 43 torr at 20°C?
(b) What is the mole fraction of benzene in the vapor above the solution described in part (a)?

2007-01-20 09:19:31 · 1 answers · asked by magicalplaygirl 1 in Physics

Using hydrogen chloride as an example, explain the role of water in acid production. Include an equation in your answer.

2007-01-20 09:18:43 · 3 answers · asked by Anonymous in Chemistry

Is it 120 degrees celsius by any chance?...

2007-01-20 09:17:18 · 7 answers · asked by Cranberrydude 3 in Chemistry

To preidct his income, Mr. Green detrmines the portions of his crop free of deseases one motnh prior to harvest. He samples75 ears of cornfrom a field and detrmines that 5 of them are diseased. From a deffernet part of the feild, a sample of 90 ears has 8 diesed ears of corn. Mr. Green estimates that he will harves 42000 ears of corn. Determine a reasonable mathematical estimate for the numbers of diesed ears in the harvest.

thanks for the help

2007-01-20 09:13:46 · 6 answers · asked by Anonymous in Mathematics

2007-01-20 09:13:02 · 8 answers · asked by Robert L 3 in Weather

it is what i really want to do, will i be challanged enough?

2007-01-20 09:11:29 · 3 answers · asked by oliverpenney@btinternet.com 1 in Earth Sciences & Geology

2007-01-20 09:09:20 · 4 answers · asked by bonita 1 in Mathematics

Why is it
O
/ \
H H
instead of
H-O-H

2007-01-20 09:07:09 · 5 answers · asked by Levi K 1 in Chemistry

Also what would your name be and your race of Aliens???
Infact give me as much detail as you can...
What kind of spaceships do you travel in
What do you look like
Etc Etc Etc...

2007-01-20 09:07:08 · 26 answers · asked by Anonymous in Astronomy & Space

2007-01-20 09:06:40 · 6 answers · asked by K;Chau 1 in Geography