Science & Mathematics - 26 November 2006

i just asked if thyroid problems are genetic.. but how about having hypothyroid? both my grandparents had problems with thyroid and got surgery. and mine seems to be swollen as told by my doctor.. im scaredddd!

2006-11-26 16:35:32 · 6 answers · asked by Love2loveYa 5 in Medicine

2006-11-26 16:34:22 · 8 answers · asked by chelsea0304@sbcglobal.net 1 in Mathematics

Hello, I desperately need help with this sheet. The professor gave out these 3 questions and they are way hard and a little beyond what he even taught. He said it was a challenge and he is even grading it in a weird way (the more people get it right the less points it is worth). Anyway if you can please take a look at it here: http://www.flickr.com/photo_zoom.gne?id=307392680&size=l

Please help in ANY WAY you can, hints tips anything will do.
Thank you again, this community in yahoo is wonderful.

2006-11-26 16:34:03 · 5 answers · asked by Hatori H 1 in Mathematics

Can you please help me determine the charge of the iron ion that exists in FeCl3? HOW to do it would be great.

2006-11-26 16:33:34 · 7 answers · asked by Mikey 2 in Chemistry

2006-11-26 16:33:33 · 10 answers · asked by ssmows6 1 in Weather

I need help please I think I am making a mistake.

2006-11-26 16:32:37 · 1 answers · asked by che_karlos 2 in Mathematics

P(x)=2x^3-9x^2-7x+13, c=5

2006-11-26 16:30:55 · 3 answers · asked by Anonymous in Mathematics

2006-11-26 16:27:54 · 3 answers · asked by torrezanthony 1 in Zoology

2006-11-26 16:27:18 · 19 answers · asked by adomacro 1 in Physics

Elemental ananalysis of a compound results in the following data

40.00 % C

6.71 % H

53.28 % O


1.80 g of the compound fills a 189.0 ml bottle with a pressure of 2931.6 mm Hg at a temperature of 23.0oC.

2006-11-26 16:26:23 · 4 answers · asked by Demaurey D 1 in Chemistry

Two cards are travelling along perpendicular roads, car A at 40mph, car B at 60mph. At Noon, when car A reaches the intersection, car B is 90 miles away, and moving toward it. At 1 PM the distance between the cars is changing, in mph, at the rate of what?

Please show your work.

2006-11-26 16:24:16 · 4 answers · asked by Mandali 1 in Mathematics

2006-11-26 16:23:40 · 3 answers · asked by Anonymous in Astronomy & Space

VAPOR PRESSURE OF SOLUTIONS
A. 10.0 g sample of the solid sucrose ( sugar, C12H22O11) was dissolved in 200.0 g of water. What will the vapor pressure of this solution be at 25C, if the normal vapor pressure of pure water at 25C is 23.8 torr?

B. Predict the vapor pressure of a solution prepared by dissolving 49.4 g of solid calcium chloride, CaCl, in150 g of water at 25C. The vapor pressure of water at 25C is 23.8 torr.


FREEZING POINT DEPRESSION/BOILING POINT ELEVATION OF SOLUTIONS
A. The freezing point of pure liquid benzene, C6H6, is 5.48 C. when 20.0 g of an unknown compound is dissolved in 500.0 g of benzene, the freezing poioint of the resulting solution is 3.77 C. what is the molecular weight of the unknown compount if Kf / (benzene) = 5.12 C. kg/mol?

B. What is the normal boiling point of a solution prepared by dissolving 54.6 grams of potassium chloride, KCl, in 400 mL of water (d = 0.997 g/mL, Kb= 0.51 C kg/mol)?

step by step process please. thanks

2006-11-26 16:22:11 · 1 answers · asked by vtxcuddlixgrl 1 in Chemistry

2006-11-26 16:20:20 · 1 answers · asked by Stephanie 1 in Physics

In a trapezoid the paralell sides are in the ratio k:1 where k>1. The line segment joining the midpoints of the non-parallel siedes divides the trapizoid into two regions whoses areas are in the ratio 5:2. What is the value of k? is it?
(A) 12
(B) 5/2
(C) 13
(D) 25/4
(E) 7

HA! bet you cant do that!!
if you do.. show me how you did it =D

2006-11-26 16:17:14 · 13 answers · asked by joker92 2 in Mathematics

i cant figure it out.

2006-11-26 16:16:25 · 18 answers · asked by Anonymous in Mathematics

2006-11-26 16:16:04 · 6 answers · asked by donnie 1 in Zoology

a question

2006-11-26 16:15:53 · 5 answers · asked by the young prince of dimes 1 in Mathematics

I was just curious about where someone would find it necessary to use imaginary numbers -- you know, that concept they teach in high school-level math where 'i' represents the square root of -1. What field needs them? Are they good for any real-life application, or is it just something they teach so that you understand the concept, but you don't really use them for anything?

2006-11-26 16:15:33 · 5 answers · asked by . 7 in Mathematics

2006-11-26 16:13:57 · 11 answers · asked by chelsea0304@sbcglobal.net 1 in Mathematics

Scientists are always telling us how 'elegant' so many natural systems are. How is that possible in a universe based in Chance? Shouldn't at least half of the systems be 'ugly', and barely work?

2006-11-26 16:13:50 · 15 answers · asked by Anonymous in Astronomy & Space

It's the only one I ever saw that looked like that.

2006-11-26 16:13:02 · 6 answers · asked by rumpfelt_propaganda 2 in Biology

2006-11-26 16:12:35 · 21 answers · asked by twitchb1tch 1 in Astronomy & Space

2006-11-26 16:12:03 · 8 answers · asked by T Casey 1 in Mathematics

Find the Zeros of the fuction by rewriting the function in intercept form.

y=3x^2 + 2x


and this one


y=12x^2+8x-15
I dont get it - help me please

2006-11-26 16:11:49 · 2 answers · asked by yisel 1 in Mathematics

2006-11-26 16:11:31 · 11 answers · asked by T Casey 1 in Mathematics

2006-11-26 16:08:23 · 1 answers · asked by chica1012 2 in Mathematics

2006-11-26 16:00:29 · 13 answers · asked by dougyfrsh 1 in Biology

Actually the lenght of Brahmaputra should have been from the sea to Manasarovar aand not from the confluence with the GAnges to Manosarovar

2006-11-26 15:59:52 · 2 answers · asked by ashish s 1 in Geography

e?

2006-11-26 15:58:52 · 5 answers · asked by wafflehouse 4 in Astronomy & Space