Science & Mathematics - 31 December 2007

typically a row house is 2, 3 , 4 bays wide. how wide is a bay and how did it originate?

2007-12-31 11:34:11 · 1 answers · asked by remodelmax 1 in Geography

2007-12-31 11:32:50 · 11 answers · asked by ptyde 1 in Zoology

I recently got my AP Calc. final exam results and I want to know how exactly to do the problems I kept getting wrong.

2007-12-31 11:29:42 · 10 answers · asked by Shay 1 in Mathematics

A rooster layes 12 eggs into a basket. That number of eggs is divided by 3, then multiplied by 17, and the square root of 64 is added. How many eggs are their now?

2007-12-31 11:25:39 · 6 answers · asked by Chuck N 2 in Mathematics

2007-12-31 11:24:01 · 4 answers · asked by flowerlegz 3 in Mathematics

No one had an answer, the last time I asked this....

I am looking for an unproven conjecture, that has a name (like "Fermat's Last Theorem"), as well as the name of the mathematician that first posed it.

2007-12-31 11:19:27 · 2 answers · asked by Anonymous in Mathematics

Can someone please explain to me how imaginary numbers work, how you square them, etc? A thorough explanation in other words, in simple terms. Please don't direct me to Wikipedia or something. I can't understand it.

2007-12-31 11:18:33 · 9 answers · asked by Darrol 3 in Mathematics

1. 4NaCl + 2Cu(NO3)2  4NaNO3 + 2CuCl2
-Precipitate: 2CuCl2

2. 4NaCl + 2Fe(NO3)2  4NaNO3 + 2FeCl2
-Precipitate: 2FeCl2

3. 4NaCl + 2Ag(NO3)2  4NaNO3 + 2AgCl2
-Precipitate: 2AgCl2

4. 2Na3PO4 + 3Cu(NO3)2  6NaNO3 + Cu3(PO4)2
-Precipitate: Cu3(PO4)2

5. 2Na3PO4 + 3Fe(NO3)2  6NaNO3 + Fe3(PO4)2
-Precipitate: Fe3(PO4)2

6. 2Na3PO4 + 3FAg(NO3)2  6NaNO3 + Ag3(PO4)2
-Precipitate: Ag3(PO4)2

7. 2NaOH + Cu(NO3)2  2NaCO3 + Cu(OH)2
-Precipitate: Cu(OH)2

8. 2NaOH + Fe(NO3)2  2NaCO3 + Fe(OH)2
-Precipitate: Fe(OH)2

9. 2NaOH + Ag(NO3)2  2NaCO3 + Ag(OH)2
-Precipitate: Ag(OH)2

10. 2NaSO4 + Cu(NO3)2  2NaNO3 + Cu(SO4)2
-Precipitate: Cu(SO4)2

11. 2NaSO4 + Fe(NO3)2  2NaNO3 + Fe(SO4)2
-Precipitate: Fe(SO4)2

12. 2NaSO4 + Ag(NO3)2  2NaNO3 + Ag(SO4)2
-Precipitate: Ag(SO4)2

2007-12-31 11:15:52 · 3 answers · asked by Joey G 2 in Chemistry

2007-12-31 11:15:35 · 29 answers · asked by Shamaya M 1 in Mathematics

I have a question to do. Simple, but theres something im stuck on.

The curve C has the equation:
Y = 4x^2 + (5-x)/x

The point P lies on C, and has x-coordinate 1.

a) Show that the value of dy/dx at P is 3


Ive tried it, and i keep getting 4...is the gradient really 3? If so, could you show me how?

2007-12-31 11:13:34 · 4 answers · asked by Anonymous in Mathematics

I know that a paraffin is an alkane, but what exactly does the n mean?

2007-12-31 11:11:22 · 7 answers · asked by humby 2 in Chemistry

2007-12-31 11:06:47 · 16 answers · asked by Shamaya M 1 in Mathematics

http://i2.tinypic.com/7wgbeyo.jpg

2007-12-31 11:04:25 · 1 answers · asked by anon reigns 3 in Chemistry

The salts used were Iodized salt, Lite Salt (it's a salt with Potassium chloride and Iodine combined) Sea salt and table salt.
Iodized salt melted the ice cube faster than all the others..but why?

2007-12-31 10:54:02 · 3 answers · asked by Anonymous in Chemistry

for a vessle or tank in a refinery

2007-12-31 10:45:35 · 2 answers · asked by fatty mcfatphatpfat 1 in Engineering

2007-12-31 10:40:42 · 19 answers · asked by Anonymous in Zoology

If the known laws of physics are correct, then the universe must be someplace, but where? My contention is that physics is extremely flawed and thus, can't be trusted to predict or calculate anything. How can one base all of science on fundamentally flawed priniciples?

2007-12-31 10:39:07 · 11 answers · asked by Anonymous in Astronomy & Space

2007-12-31 10:36:54 · 5 answers · asked by mathstudent 2 in Mathematics

2007-12-31 10:35:06 · 6 answers · asked by Anonymous in Physics

List where the weather is from. Also put how your dream weather would be.

2007-12-31 10:33:43 · 18 answers · asked by Bubbles 4 in Weather

What do you think?

2007-12-31 10:32:49 · 7 answers · asked by Steven M 3 in Other - Science

2007-12-31 10:32:16 · 15 answers · asked by princesah 1 in Geography

i'll be like 140 years old or dead before they get anything done.

2007-12-31 10:29:44 · 5 answers · asked by Anonymous in Astronomy & Space

here is the problem:

90*(.9572^x)+
80*(.0214^x)+
80*(.0214^x) =100

now...solve for x (the equation is all one line, but the formatting gets screwed up!)

i tried to take the log of both sides, but i think that's wrong.

(note: here is why... log (a + b + c) does not equal log(a) + log(b) + log(c)... try it with a=20, b=40, c=50.... log (a + b + c) = log(110) which is not the same as log(20)+log(40)+log(50)... i think this is the key to the problem.... in the equation above, you have a similar situation where there are 3 terms that are added together....)

if anyone can show me how to solve for x it would be much appreciated!!!

2007-12-31 10:27:31 · 6 answers · asked by Anonymous in Mathematics

2007-12-31 10:26:57 · 8 answers · asked by celtic_storm1211 1 in Zoology

consider the list of the grades 15, 25, 52, 14, 35, 42, 25 then the quadruple ( mean, median, standard deviation, interquartile range is

1- ( 27, 25, 14, 29.5)
2- (29.7, 25, 13, 27)
3- (27, 25, 13, 29.5)
4- (29.7, 25, 14, 27)

2007-12-31 10:26:18 · 4 answers · asked by fox 1 in Mathematics

The slope is supposed to be the recipricol of the original slope, i have an answer but i am still confused..this is what i got


y2 - y1 = -2 -2 =-4 = -2
--------- ------ --- ---
x2-x1 = 0+2 = 2 = 1


is -2 the answer or the RECIPROCAl 2?

2007-12-31 10:22:28 · 5 answers · asked by th31N0nliigiRl 1 in Mathematics

2007-12-31 10:21:58 · 9 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-31 10:18:16 · 11 answers · asked by Anonymous in Mathematics

1) vascular tissue in the branches, trunk, and roots
2) epidermal cells in the trunk and branches
3) process of photosynthesis in the trunk and branches
4) activities of vacuoles in cells in the trunk and roots

2007-12-31 10:17:07 · 3 answers · asked by WordIsBond 5 in Biology