Science & Mathematics - 7 January 2007

:D

2007-01-07 18:07:00 · 2 answers · asked by frostwizrd 2 in Engineering

in knots or miles per hour

2007-01-07 18:05:34 · 9 answers · asked by Anonymous in Engineering

double checking. i am a math fiend. I best get it right.

2007-01-07 18:02:42 · 5 answers · asked by je suis tres desole 2 in Mathematics

2007-01-07 18:01:04 · 3 answers · asked by Anonymous in Weather

Give the advantages, design, structural chages, difference
What r the change in material constranins

2007-01-07 18:00:15 · 4 answers · asked by Rahulouce 2 in Engineering

If so, where can I find it?

2007-01-07 17:58:13 · 1 answers · asked by Ejsenstejn 2 in Physics

iron(III) oxide can be reduced with carbon monoxide according to the following equation

Fe2O3(s) -->2 Fe(s) + 3 CO2 (g)

A 16.2 cL sample of CO(g) at 1.5 atm and 200*C is combined with 15.39g of Fe2O3(s)

(i)what is the limiting reactant for the reaction? justify your answer with calculations
(ii) how many moles of Fe(s) are formed in the reaction

2007-01-07 17:55:47 · 2 answers · asked by robert m 1 in Chemistry

2007-01-07 17:55:24 · 10 answers · asked by Anonymous in Mathematics

In the Bohr model of the hydrogen atom, precisely what is quantized?

2007-01-07 17:54:25 · 2 answers · asked by Anonymous in Chemistry

I just shared some new info that I heard from a reliable source about UFO on the moon. It's the fact that moon existed before the earth, so I wonder how it started revolving around the earth? Was the moon an artificial satellite placed by aliens to land on it whenever necessary and keep monitoring the earth? It's the fact that Neil was the 1st man to land on the moon. Then who constructed that structure on the moon of which Neil took a photograph?

2007-01-07 17:53:13 · 11 answers · asked by Anonymous in Astronomy & Space

(1) What experimental evidence supports the quantum theory for light?

(2) the laser in an audio comact disc plater uses light with a wavelength of 7.80X10^2 nm. what is the frequency of this light? what is the energy of a single photon of this light?

2007-01-07 17:52:10 · 1 answers · asked by Anonymous in Chemistry

a ship leaves port and travels 120 miles at the bearing of S 29 degreees west. how far south and how fat west is the ship?

evaluate tan (tan^-1(7/11)

evaluate sin(sin^-1(3/2)

2007-01-07 17:50:29 · 3 answers · asked by dojorno5 2 in Mathematics

2007-01-07 17:46:34 · 9 answers · asked by L S 1 in Astronomy & Space

question from www.brokenbrain-kuramannil.blogspot.com

2007-01-07 17:46:16 · 2 answers · asked by asdsa a 1 in Geography

i really need help on this one

2007-01-07 17:45:44 · 6 answers · asked by Anonymous in Physics

The smallest factor is repeated twice whille the others only once.
whats the number? What are the factors?

2007-01-07 17:37:37 · 7 answers · asked by Yellow 1 in Mathematics

How do you rationalize the denominator on this problem?
-9-9i OVER -1-8i

Also, this problem ask to Find all the real and complex zeros of the polynomial; x^4 + 4x^3 +x^2 -16x -20.

I look all over my math book but it does not teach you how to do these kind of problems. Thanks.

2007-01-07 17:33:01 · 4 answers · asked by mrhuangsta 3 in Mathematics

2007-01-07 17:28:54 · 3 answers · asked by Anonymous in Mathematics

I'm supposed to state whether the given measurements determine zero, one, or two triangles. (It's an SSA [some like to reverse it]triangle)

C=30 degrees
a=32
c=16

I got one but I'm not completely sure because when I did the problem I got A = 90 degrees and techncally if you subtract 180 from 90 you get 90 and then add the 30 degrees from the given you only get 120 which is less than 180 meaning it should determine 2 triangles but the only problem with that is that you get 2 90 degree angles in a triangle... So because of that I think it's one.

If someone could solve it and tell me what they get and why?

2007-01-07 17:28:41 · 5 answers · asked by prefabgal666 1 in Mathematics

There was rumor going around that people have seen squabitts. I did not believe this but the other day I saw a squirell with a very short tail and it was hopping like a rabbit it also had larger hind legs.

2007-01-07 17:22:57 · 6 answers · asked by Jess 1 in Other - Science

There was rumor going around that people have seen squabitts. I did not believe this but the other day I saw a squirell with a very short tail and it was hopping like a rabbit it also had larger hind legs.

2007-01-07 17:22:18 · 11 answers · asked by Jess 1 in Zoology

for the complete hydrogenation of the polyunsaturated fatty acid linnoleic acid,
CH3 (CH2)4CH = CHCH2CH = CH(CH(CH2)7COOH.

2007-01-07 17:20:54 · 2 answers · asked by babycakez 3 in Chemistry

Simplify this expression completely.

3/(x^2 + 5x +6) - 2/(x^2-4)

thnx

2007-01-07 17:19:55 · 9 answers · asked by Anonymous in Mathematics

how can i find coordinates of a landmark with compass

2007-01-07 17:19:06 · 3 answers · asked by hikaru a 1 in Geography

It was on 20/20 or Dateline I think. A mathematician that is volunteering his skill in schools around the nation teaching kids ages elementary and up how to do math quickly in their head. The program didn' t show much of the methods, just said he could teach it in a matter of minutes. This guy was teaching 4th graders how to multiply 2 and 3 digits mentally.Also said he may decide to put the method on video or dvd soon. Does anyone know his name, or the name of a program that teaches you to do math in your head?

2007-01-07 17:18:30 · 2 answers · asked by Getsbetterwithtime 3 in Mathematics

It's a geometric pattern/shape... below is the picture, I'd put the picture in the question but html isn't allowed it seems.

http://snipurl.com/16uwt

2007-01-07 17:18:24 · 7 answers · asked by CaliCali 2 in Mathematics

y+x=7
y+3=x

2007-01-07 17:17:04 · 8 answers · asked by Anonymous in Mathematics

(a) yes,but only if you chose the correct system
(b) yes, but only in the horizontal direction
(c) no, because the velocity of tfhe basketball player chanlges with time.
(d)it is a bad question,because momentum conservation is for objects moving at constant speed,and the basketball player is accelerating.

2007-01-07 17:16:53 · 8 answers · asked by good friend 1 in Physics

Energy Levels In Hydrogen Atom?
So the formula is - E(n)=218.0x10^-20/n^2
E(n) give the energy level of energy level of the H atom in Joules.
Note: We are keeping all number relative to 10^-20 to make graphing

Cacculate if n= 1,2,3

* I caculate it, but I dont' know how to graph it. The chart is like this http://www.phys.uoa.gr/phononics/images/...
Where each square is represent as 5x10^-20.
Please help mee. This is duee tomorrow.
Show me how to graph it, and can u cacualte it, so I can check my answer.

2007-01-07 17:16:49 · 1 answers · asked by Azumi 2 in Mathematics

2007-01-07 17:12:08 · 4 answers · asked by Anonymous in Mathematics