Science & Mathematics - 20 August 2007

2007-08-20 14:17:00 · 5 answers · asked by Anonymous in Other - Science

2007-08-20 14:16:58 · 2 answers · asked by snakker2k 6 in Medicine

i hear it is true but then elsewhere i hear it is not.. so does anyone know the truth?

2007-08-20 14:16:43 · 12 answers · asked by Anonymous in Astronomy & Space

2007-08-20 14:14:10 · 5 answers · asked by ashwini_pp2000 1 in Astronomy & Space

2007-08-20 14:08:47 · 35 answers · asked by nightowl 2 in Mathematics

2007-08-20 14:08:22 · 4 answers · asked by Anonymous in Biology

If a dummy of similar weight to me were substituted, the bike would keel over and yet no discernable effort is made on my part to keep balance. One of those physics questions that has always puzzled me.

2007-08-20 14:05:58 · 12 answers · asked by Lunerousse 3 in Physics

2007-08-20 14:00:46 · 2 answers · asked by Anonymous in Medicine

2x-3y = -7
4x -y = -14

what I keep on getting is no solution. when I do substitution it gives me -14 = -14.

i also get no solution for the following:

5x+2y= -3
15x+6y = 15

2007-08-20 13:59:12 · 6 answers · asked by Anonymous in Mathematics

science:86.342 millimeter =______dkm

2007-08-20 13:54:51 · 2 answers · asked by Anonymous in Other - Science

16: 49x2 + 36 = 84x
-6/7, 0
6/7
-7, -6


17: 25x2 - 10x + 1 = 0
-5, 1
1, 5
1/5


18: 12x2 + 2x - 4 = 0
1/2, 0
-2/3, 1/2
2/3, 1/2, 0


19: (a + b)2 + 20(a + b) + 100 = 0
a + b = _______

-10
10
-10, 10


20: 25(a + b)2 - 10(a + b) = -1
a + b = ______

5
1/5
5, 1/5

2007-08-20 13:54:42 · 4 answers · asked by kitara 1 in Mathematics

Specifically: x^2 + y^2 = 4
And: x^2 + y^2 - 4x - 4y = -4

2007-08-20 13:52:07 · 9 answers · asked by bubblebobboy 1 in Mathematics

2007-08-20 13:51:14 · 2 answers · asked by Jro 3 in Earth Sciences & Geology

http://farm2.static.flickr.com/1171/1187432092_b32f431c99_b.jpg

2007-08-20 13:50:29 · 7 answers · asked by terra2055 1 in Zoology

2007-08-20 13:49:58 · 3 answers · asked by coming2epiphany 2 in Zoology

11: x2 + 15x + 54 = 0
6, 9
-6, -9
-54


12: x2 - 13x + 30 = 0
-5, 6
3, 10
-3, -10


13: x2 - 22x = -120
-10, 22
-10, -12
10, 12


14: 64x2 - 144x + 81 = 0
9/8
8/9, 0
8/9, 9/8


15: 9x2 + 48x + 64 = 0
-8/3
8/3
-3/8

2007-08-20 13:47:34 · 2 answers · asked by kitara 1 in Mathematics

6: x2 - 8x + 6x = 48
0, 6
-8, 6
-6, 8


7: 10x2 + 16x - 55x - 88 = 0
11/2, -8/5
-11/2, 8/5
-2/11, 5/8


8: x2 + x - 3x = 3
-3, 1
-1, 3
3


9: x2 - 23x + 132 = 0
11, 12
-11, -12
-12


10: x2 - 24x = -144
144
-12, 12
12

2007-08-20 13:43:56 · 3 answers · asked by kitara 1 in Mathematics

We being defined as, I dunno, the domain eukarya or something.

Anyways, could we (original organisms, etc.) not have "abiogenesized" in multiple parts of the earth near simultaneously and (maybe) come from different ancestors that eventually evolved to interbreed?

2007-08-20 13:43:22 · 11 answers · asked by Moodrets 2 in Biology

2007-08-20 13:43:11 · 15 answers · asked by Jacquie L 1 in Astronomy & Space

I have read plenty of books but it still gets tricky for me. Ionic is when you have a anion and cation together and covalent bonds is when an ion donates more protons than the other ions it is bonding???

i am confused please help.

2007-08-20 13:41:52 · 5 answers · asked by Anonymous in Chemistry

Do worm holes or warpholes actualy exist? If so ,what exactly are they?

2007-08-20 13:41:29 · 3 answers · asked by coldfire_blacksheep 2 in Astronomy & Space

Hi. I need a solution to this problem. I am currently on the section in my maths book called Volume . There is a question and i do not know the answer. The shape is a Trapezoidal Prism, hence the title. There are four measurements: 7cm, 3cm, 9 cm and 4 cm. I have read the answer and it says that it is V=148.5 cm3. It's very strange because i know that the formula for a Trapezium is 1/2(a+b)x h, and there is 4 measurements. Also why is the answer in cubic centimetres. I need to know the steps on how to work it out etc.

Here is a picture of it: http://img208.imageshack.us/img208/4513/...

Also i need help on the volume of a Cylinder. The length is 1.1m and the constant area of cross section is 90cm. The answer is 0.70cm3. Could someone also explain steps on how to work it out. Also why is the answer in cubic centimetres?

Here is a picture of it: http://img62.imageshack.us/my.php?image=...
All comments are much appreciated. Thank You.

2007-08-20 13:39:14 · 3 answers · asked by Jay Garrick 1 in Mathematics

1) NaCl ionic bond
2)NaOH ionic bond
3) CF4 ionic bond
4) CH3Li covalent bond
5) CH2Cl2 covalent bond
6) NaOCH3 covalent bond and ionic bond
7)HCO2Na covalent bond

2007-08-20 13:37:30 · 2 answers · asked by Anonymous in Chemistry

I have some wire to use and a battery if it'll help. I just need to make a spark. I've heard I can charge it by placing it next to a CRT tv, but I'm not sure on the specifics.

2007-08-20 13:36:37 · 5 answers · asked by Anonymous 2 in Other - Science

Multiple choice questions

Hemophilia a recessive, sex-linked trait. Use n to represent the allele for hemophilia. A woman has normal blood clotting type O marries man with normal blood clotting type AB blood. The womans father was known to be hemophiliac with type B blood.

a. Womans fathers genotype as completely be determined.
a. XnY,BB b.XNY,BO c.XnXn,BO d.XnY,BO

b. term best describe woman relating to hemophilia?
a.pure breeding b.hybrid or heterozygous c.carrier d. dihybrid e. none of these

c. what are chances couple having child with hemophilia?
a.0 b.1 c.1/2 d.1/4 e. 3/4

d. chances having a daughter with hemophilia?
a.0 b.1 c.1/2 d.1/4 e.1/8

e. chances having a son with blood type A and hemophilia?
a.0 b.1 c.1/2 d.1/4 e.1/8

f. according to laws of probability, what percentage of this womans sons should inherit the sex-linked trait hemophilia
from their mother?
a.0% b.25% c.50% d.75% e.100%

2007-08-20 13:35:33 · 3 answers · asked by momtoboys 2 in Biology

y=mx+b

2007-08-20 13:33:48 · 4 answers · asked by Anonymous in Mathematics

2007-08-20 13:30:27 · 20 answers · asked by Kumara U 1 in Astronomy & Space

2007-08-20 13:29:23 · 4 answers · asked by savspringer 1 in Mathematics

i only asked a sensitive question sensatively ,i do not mock others i just wanted to investigate how people who are pro space exploration feel about what the resource drain is doing to us as a species but if j wants to be a monkey then can the organ grinder please answer my question as the monkey offends

2007-08-20 13:25:21 · 8 answers · asked by samman 3 in Astronomy & Space

MATH .......integers

2007-08-20 13:21:55 · 8 answers · asked by Allison L 1 in Mathematics