Science & Mathematics - 25 November 2007

2007-11-25 09:11:25 · 6 answers · asked by hi pplz!!!!!:} 1 in Biology

2007-11-25 09:10:21 · 3 answers · asked by loranda s 1 in Zoology

i just want to know if it would affect us?

2007-11-25 09:08:05 · 8 answers · asked by Anonymous in Astronomy & Space

2007-11-25 09:07:34 · 10 answers · asked by snowy1 1 in Astronomy & Space

If 4.83mL of an unknown gas effuses through a hole in the same time it takes 9.23mL of Ar to effuse through the same hole, under the same conditions, what is the molecular weight of the unknown gas?

ANy help appreciated. My text book isn't very helpful. It gives one formula but no explanation and I cant use the formula for this problem.

Thanks

2007-11-25 09:06:59 · 1 answers · asked by Jen 2 in Chemistry

I have a huge moth on my wall in reach of my baby boy who crawls. I want the thing dead but i just cant squash it, so can you kill it with insect spray?

2007-11-25 09:03:15 · 6 answers · asked by Jemjems_Mummy 3 in Zoology

How would i do that problem

2007-11-25 09:00:37 · 3 answers · asked by Anonymous in Chemistry

2007-11-25 08:59:26 · 1 answers · asked by Anonymous in Mathematics

1.) Ammonium Phosphate

2.) Barium Iodide

3.) Potassium Sulfate

4.) Lithium Sulfide

5.) Calcium Oxide

6.) Magnesium Carbonate


It would help if you explained to me how you did it....

2007-11-25 08:58:47 · 2 answers · asked by Anonymous in Chemistry

Hello I need help on the following question part c) I need to see if I am doing it correctly!

http://www.collegeboard.com/prod_downloads/ap/students/physics/physics_b_frq_02.pdf

For part c where it says to calculate the density of the liquid. To determine the density one needs to find the difference in vertical distance that the mass is not travelling due to the opposing buoyance force.

Does that mean the vertical distance from the object to the top of the surface?

Anyhow the following formula was shown to me :

k x delta h= mass of liquid x gravity

k x delta h = density of liquid x volume of mass x gravity

density of liquid = k x delta h / (volume off mass x gravity)

is this correct?

Thank you!!

2007-11-25 08:58:37 · 2 answers · asked by Anonymous in Physics

First, work with the subset {83, 838, 838383 ...}:
Assume that there exists a number x for which x^3 = 8383...83
If x^3 terminates in a 3, then x must terminate in a 7 (--7^3 = 343).
x can be rewritten as (10n+7):
(10n+7)^3 = 8383...83
1000n^3+1400n^2+490n+700n^2+980N+343 = 8383...83
1000n^3+2100n^2+1470n+343 = 8383...83
-subtract 343 on both sides
1000n^3+2100n^2+1470n = 8383...838040
-divide by 10 on both sides
100n^3+210n^2+147n = 8383...83804

Since the value of n must make 100n^3+210n^2+147n a number terminating in 4, and 147n is the only part of the equation that concerned the ones digit, 147n must equal a number terminating in 4. In order for 147n to terminate in a 4, n must terminate in a 2.
Therefore n can be rewritten as (10m+2)
(10(10m+2)+7)^3 = 8383...83
(100m+20+7)^3 = 8383...83
(100m+27)^3 = 8383...83
100000m^3+81000m^2+14310m+4580=8383...8383
-subtract 4580 on both sides
100000m^3+81000m^2+14310m= 8383...833803

2007-11-25 08:58:17 · 1 answers · asked by Man 5 in Mathematics

2007-11-25 08:57:23 · 2 answers · asked by Stacie O 2 in Biology

i need to get this answer quick!
So please answer!

2007-11-25 08:50:41 · 1 answers · asked by Anonymous in Chemistry

2007-11-25 08:49:27 · 1 answers · asked by tricia b 1 in Chemistry

2007-11-25 08:47:21 · 9 answers · asked by Anonymous in Weather

I know this is an open invitation for insults and silly comments so go ahead! It will give me a good laugh. But if there really are people out there that can figure this out, please let me know!

2007-11-25 08:46:33 · 15 answers · asked by Anonymous in Paranormal Phenomena

On the way out of a church I was visiting (years ago)..the preacher (at the door) shook my hand. A BIG "electrical feeling" shock went into my hand. I said ,"What was that?!!!!" He just "grinned" (like he KNEW what he had done.)(Don't say it was a blessing...it WASN'T)(Bad things happened after that.)

2007-11-25 08:44:29 · 12 answers · asked by Deenie 6 in Paranormal Phenomena

julia may have been marrried and no longer goes by striha, however her son is, and his name is Artem Stryha, possibly attending a high school in the lakes NH region, he is about 16 years old

2007-11-25 08:43:47 · 1 answers · asked by george n 1 in Geography

not bisphosphate. BIPHOSPHATE.

2007-11-25 08:39:12 · 3 answers · asked by Anonymous in Biology

the Gas over water.

2007-11-25 08:38:00 · 1 answers · asked by Anonymous in Chemistry

What are advantages of using a stain on a specimen?

2007-11-25 08:33:56 · 2 answers · asked by ~,^ 1 in Other - Science

2007-11-25 08:32:44 · 4 answers · asked by CrazyCatGirl 2 in Physics

i read auras at an early age,i have expereinced seeing ghosts,my mother has visions ,my grandmother was gypsy and practiced magic,i have native american ancestory as well which i have gotten some bad juju from a medicine man,i am a strong believer of karma,i am indeed different from my peers and i trust no one.I come from a wide variety of backgrounds(race) and my sign is a cancer..

2007-11-25 08:31:16 · 11 answers · asked by vigilant82 2 in Paranormal Phenomena

Write the augmented matrix:
3x + 5y = - 13
2x + 3y = - 9
A) | 3 5 | - 13 |
| 2 3 | - 9 |

B) | 2 3 | - 9 |
| 3 5 | - 13 |

C) | - 13| 3 5 |
| - 9| - 2 3 |

D) | 13| 3 5 |
| - 9| 2 3 |

2007-11-25 08:29:09 · 4 answers · asked by Anonymous in Mathematics

Use echelon method to solve x and y in equations:
2x + 7y = - 8
- 2x + 3y = - 12
A) x = 3, y = 2
B) x = - 3, y = 2
C) x = 3, y = - 2
D) x = - 3, y = - 2

2007-11-25 08:27:51 · 3 answers · asked by Anonymous in Mathematics

1. All forms of passive diffusion depend on ...
A) energy from the cell in the form of ATP
B) ion channels
C) the kinetic energy of molecules
D) carrier proteins

I think it is C.

2. Most of the time, the environment that plant cells live in is
A) isotonic
B) hypertonic
C) hypotonic
D) none of these

I think it is C.

3. Gateway for ions to enter and leave a cell ...
A) hydrophobic end
B) hydrophilic end
C) protein channels
D) a, b, and c

I think it is C.

4. Sodium-potassium pumps ..
A) moves Na ions and K ions into a cell
B) moves Na ions and K ions out of a cell
C) moves Na ions out and K ions into a cell
D) moves Na ions into a cell and K ions out of the cell

I think it is C.

5. Membrane bound organelles are also referred to as ...
A) vesicles
B) channels
C) integral proteins
D) a and b

I think it is A.

2007-11-25 08:27:43 · 2 answers · asked by mz. * 1 in Biology

What exactly does it do?

2007-11-25 08:23:39 · 2 answers · asked by Anonymous in Other - Science

F(x)=|1+x|/|1-x^2|*times* (x^2-5x+6)(x-1)^3/
(4-x^2)(x+3)(2x+1)^2 <- less than or equal to 0
hope you can kinda of understand the formatting! Any help would be greatly appreciated!

2007-11-25 08:23:36 · 2 answers · asked by ...confused.. 1 in Mathematics

Use echelon method to solve x and y in equations:
4x + y = 9
3x – y = 5
A) x = 1, y = 2
B) x = 2, y = 1
C) x = - 2, y = - 1
D) x = - 1, y = 2

2007-11-25 08:22:49 · 4 answers · asked by brandon c 1 in Mathematics

2007-11-25 08:21:50 · 5 answers · asked by Anonymous in Biology