Science & Mathematics - 15 January 2007

helpppppp, please!

Explain, in terms of atomic structure, why the atomic radius of iodine is greater than the atomic radius of fluorine.

i have it at the tip of my tongue, but i don't know how to word it. help?

2007-01-15 09:14:07 · 2 answers · asked by Anonymous in Chemistry

Factor the polynomial completely. If the polynomial is prime, please say so:

32a^2 + 4a - 6

Again, if you cannot help, I do understand, but please leave your nasty comments to yourself. This is a place to submit questions and get help and I truly need HELP with my algebra HOMEWORK! I'm not lazy nor am I trying to find the easy way out. I just simply need help! Thanks to all of you who are truly here to help.

2007-01-15 09:13:59 · 4 answers · asked by SweetnSpiceyBrown 2 in Mathematics

1. schist (metamorphic)
2. feldspar (sedimentary)
3.granite (igneous)
4. limestone (sedimentary)
5. chlorite (igneous)
6. albite (sedimentary)
7. quartzite (metamorphic)
8. sandstone (sedimentary)

where the rock would be formed in not how it was formed =]

2007-01-15 09:12:41 · 3 answers · asked by pueptypants 3 in Earth Sciences & Geology

If the total bill at a restaurant, including a 15% tip, is
$65.32, what was the cost of the meal alone?

2007-01-15 09:12:01 · 10 answers · asked by Anonymous in Mathematics

Do you think that all time is linear? just wondering

2007-01-15 09:11:30 · 7 answers · asked by Anonymous in Astronomy & Space

2007-01-15 09:11:25 · 2 answers · asked by nat b 1 in Medicine

This is true when dealing with the golden section (1.618 approx.). This constant (phi) is arrived at through the fibbonacci sequence, i.e 0,1,1,2,3,5,8,13,21,34,55....
Then you make fractions: 1+1/2+2/3+3/5+5/8+8/13+....
and you get 1.618 (I think I did this right.)

so how can this infinite sequence^2 (1.618)(1.618)=2.618
and 1.618+1=2.618.

Also, how can (Phi^2 * 6)/5=pi? 2.618*6/5=3.1416?

weird, because there is the other equation e^(pi*i)=1?

Can you substitiute e^([Phi^2*6/5]*i)=1? i=sq rt of (-1).

2007-01-15 09:11:11 · 4 answers · asked by ? 2 in Mathematics

Paul invested $5000 in a time deposit. What interest will
he earn for 1 year if the interest rate is 6.5%?

A chemist has 300 milliliters (mL) of solution that is 18%
acid. How many milliliters of acid are in the solution?

Ms. Jordan has been given a loan of $2500 for 1 year. If
the interest charged is $275, what is the interest rate on the loan?

A survey of 400 people found that 66 were left-handed. What percent of those surveyed were left-handed?

The electricity costs of a business decreased from $12,000
one year to $10,920 the next. What is the rate of decrease?

2007-01-15 09:11:01 · 7 answers · asked by Anonymous in Mathematics

I am pretty cool, maybe a little too cool. I seemed to have frozen the whole western side of the state!

Should I maybe move to a climate that needs to be a bit cooler like Arizona?

2007-01-15 09:10:39 · 12 answers · asked by Anonymous in Weather

2007-01-15 09:09:54 · 3 answers · asked by Lisa 1 in Chemistry

what are the 10 levels of biological order...i cant find it anywhere.

2007-01-15 09:08:35 · 4 answers · asked by uluvme8807 3 in Biology

I need help with slopes and things of that nature.
For example: write an equation in slope-intercept form containing (9,-3) and (0,5) or passing through (3,4) and (5,8).

also.. I REALLY need help with word problems too, such as: a ski has a vertical drop of 1500 ft. over a distance of 4200 ft. what is the slope of the ski hill?

if u can help, please do so, thanx!

2007-01-15 09:05:33 · 6 answers · asked by naughtygirlof06 2 in Mathematics

(i cant figure out what i did wrong on this one.)

A)50.0 degrees C
B)15.0 degrees C
C)5.00 degrees C
D)4.00 degrees C

heres what i did:
q=mC(delta)T
1680=80(4.18)x
1680=334.4x
x=5.02...
so i put C, but that was wrong

please show me what to do for this

2007-01-15 09:05:29 · 3 answers · asked by um yea hi 4 in Chemistry

Martina leaves home at 9 A.M., bicycling at a rate of
24 mi/h. Two hours later, John leaves, driving at the rate of 48 mi/h. At what time will John catch up with Martina?

There are 850 Douglas fir and ponderosa pine trees in a
section of forest bought by Sawz Logging Co. The company paid an average of $300 for each Douglas fir and $225 for each ponderosa pine. If the company paid $217,500 for the trees, how many of each kind did the company buy?

A common mistake when solving equations is the following:
The equation: 2(x - 2) = x + 3
First step in solving: 2x - 2 = x + 3

2007-01-15 09:04:19 · 3 answers · asked by Anonymous in Mathematics

A 0.5130 g of aspirn tablet which was dissolved in 95% ethanol required 27.98L of 0.100 M NaOH for neutralization. Then an additional 42.78mL of 0.10M NaOH was added and the solution was heated to hydrolyze the acetylsaclicylic acid. After the reaction mixture was cooled , the excess base was back-titrated with 14.29 mL of 0.1056 M HCl.
a)how many grams of acetylsaclicylic acid are in the tablet?
b)What % w/w of the tablet is acetylsaclicylic acid?

2007-01-15 09:04:05 · 1 answers · asked by SweetAngel 1 in Chemistry

hi well i have this exam that will be coming up soon and i need to study for a genotypic ratio, phenotype, and phenotype ratio
if gr is 1:16 thats the phenotype and its ratio

2007-01-15 09:03:37 · 4 answers · asked by mano558 5 in Biology

Why can a short circuit be dangerous?

2007-01-15 08:59:52 · 5 answers · asked by ♫ Saaskie ♫ 1 in Engineering

I would like to start working in the medical field quickly, but do not want to go to school for 2 years. How can I get a degree in Sonography and how long will it take?

2007-01-15 08:58:40 · 5 answers · asked by amandacarol84 1 in Medicine

2007-01-15 08:58:33 · 18 answers · asked by hannangulrez 1 in Earth Sciences & Geology

what prevents thermonuclear reactions from occuring at the center of a white dwarf? if no thermonuclear reactions take place in its core, why doesnt the star collapse?

2007-01-15 08:57:49 · 2 answers · asked by OK123 5 in Astronomy & Space

Hi everyone.
I am trying to find a subject to write a 3-5 pages long scientific article about. The article will be published in the school science magazine and it really needs to be 'scientific'.
I think, time travel is a nice and broad subject but I'm not sure if it's really scientific.
Can you help me? What are your opinions?

2007-01-15 08:57:20 · 7 answers · asked by Anonymous in Physics

I keep on having a dream with about a circle with a star in the middle, then me and a person I love are spinning while a light comes down around us like protection?? Whats up with this ?? I have been dreaming ths for about a year. I am not with this person I love.

2007-01-15 08:55:40 · 2 answers · asked by Anonymous in Physics

jsagdjksa

2007-01-15 08:55:23 · 1 answers · asked by chocotaco33 1 in Mathematics

And what are the characteristics of a parallel circuit in terms of the electric current and voltage drops across electrical loads in each circuit?

2007-01-15 08:54:14 · 5 answers · asked by ☺ Joel ☺ 1 in Engineering

2007-01-15 08:54:13 · 7 answers · asked by Anonymous in Chemistry

2007-01-15 08:52:56 · 5 answers · asked by raxer 2 in Chemistry

Can anyone tell me where I can find open-souce, modifyable accurate speech-recognition software, and a similar criteria matching language translator (something like google translate)? I would like to work preferably in Windows. Give me the Linux alternatives too, though.

2007-01-15 08:51:03 · 2 answers · asked by Parry 3 in Engineering

2007-01-15 08:50:53 · 4 answers · asked by Anonymous in Biology

2007-01-15 08:50:23 · 3 answers · asked by perr_dogg 2 in Earth Sciences & Geology

Do things like amebia or bacteria communicate with each other. For example how do they multiply, is there some sort of communication process thats takes place prior to or after they split mutate. If there is some sort of mating or sexual process purley for procreation there must be some sort of communication process.

2007-01-15 08:48:01 · 6 answers · asked by Big Will 4 in Biology