Science & Mathematics - 29 November 2007

2007-11-29 15:01:22 · 4 answers · asked by Answer Seeker 1 in Mathematics

my answer is 15 0r -15

2007-11-29 15:00:33 · 7 answers · asked by thonia 1 in Mathematics

2007-11-29 14:59:52 · 9 answers · asked by Anonymous in Medicine

joe has a piece of wire which is 8 and 4 ninths yards long. mike has a piece of wire wichis 25.ft 6.in. long whose piece of wire is longer and how longer

i needs an answer but most importantly the explanation

2007-11-29 14:59:31 · 4 answers · asked by VICTOR P 2 in Mathematics

2007-11-29 14:58:47 · 9 answers · asked by myfrigginjunklist 2 in Engineering

An unknown gas, X2(g), which behaves much like N2(g) (NN), is analysed and the following enthalpies of formation are obtained:
Gas
X(g) 376 kJ/mol
H(g) 217 kJ/mol
X2H4(g) 442 kJ/mol


We also know that the X-H bond energy is 267 kJ/mol.
Use this information to estimate the X-X (single-)bond energy in the X2H4 molecule

Please do explain the proper method and the various steps used to solve this problem.
Thank you.

2007-11-29 14:54:58 · 1 answers · asked by Anonymous in Chemistry

I just had a dream about it.

2007-11-29 14:52:26 · 15 answers · asked by WTF? 1 in Astronomy & Space

Calculate the frequency of a sound wave in helium if its displacement amplitude in helium is 3.9 *10^-10 m and the pressure amplitude is 8.8 *10^-5 N/m^2. The density of helium is 0.48 kg/m^3 and the speed of sound in helium is 291. 6 m/s. Answer in Hz.

2007-11-29 14:51:40 · 1 answers · asked by Ron108 1 in Physics

please solve these single replacement reactions! PLZ TRY INCLUDING STEPS

1. zinc metal is placed in a solution of copper (II) sulfate
2. a small piece of sodium metal is added to distilled water
3. Chlorine gas is bubbled into a solution of sodium iodide

FIRST ONE TO ANSWER N SHOW STEPS CORRECTLY GETS 10 PTS!

2007-11-29 14:49:31 · 4 answers · asked by !!!!!! 3 in Chemistry

I have to write a rough draft for science fair.
My project is: Do violent video games affect blood pressure?

How should I start my first sentence? It has to grab your attention. Also: what should I include in the draft? I'm going to talk about video games, other statistics and studies, heart rate, and effects. What else should I include?

2007-11-29 14:48:33 · 18 answers · asked by wavves 4 in Other - Science

Where did Apollo 15 crew members get their degrees fromfirst one gets 10 points. I know its in big 10 conference but im not sure where.

2007-11-29 14:47:08 · 3 answers · asked by Beau 2 in Astronomy & Space

approximate the expression involving square roots to three decimals

2007-11-29 14:41:15 · 12 answers · asked by thonia 1 in Mathematics

how u factor these: x^this means squared k! 6x^-22x+12 18+7x^-x^4
2x^-x=-3 2m^+7m=-3 x^-x-72

2007-11-29 14:40:28 · 2 answers · asked by Anonymous in Mathematics

A. Between what two consecutive integers do each of the following numbers like?

1. square root of 21
2. square root of 50
3. square root of 70
4. square root of 98
5. square root of 145
6. square root of 250
7. square root of 310
8. square root of 450
9. square root of 555
10. square root of 650
11. cube root of 16
12. cube root of 60
13. cube root of 200
14. fifth root of 150
15. fourth root of 175



B. Find a one-decimal place approximation for each of the following expressions:

1. square root of 10
2. square root of 18
3. square root of 30
4. square root of 37
5. square root of 50
6. cube root of 8
7. fifth root of 26
8. fourth root of 45
9. square root of 65
10. cube root of 99
11. negative square root of 20
12. negative cube of 35
13. negative fourth root of 200
14. cube root of 15
15. cube root of 30




Pls. help me pls. i need it now pls. pls. i'm begging you pls. pls. pls. very pls.

2007-11-29 14:39:44 · 2 answers · asked by Anonymous in Mathematics

1.Draw Lewis structures for iodine monochloride, ICI, and hydrogen bromide, HBr
2.Using iodomethane, CH3I, as a model, draw the lewis strutuctre for dichlormethane, CH2Cl2
3.Draw the Lewis structure for methanol, CH3OH. Draw the CH3 part first, then add O and H.
4.Draw the Lewis structure for ethane, C2H6
********* plz help these were the only probelms i didnt get! plz help me! u can put answer here or email me at Basra1@sbcglobal.net
**** plz help show u got a heart i need to pass this class plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

2007-11-29 14:39:25 · 1 answers · asked by manny 1 in Chemistry

I'm doing a report on dholes and I need to know what a dhole's predators are

2007-11-29 14:39:20 · 4 answers · asked by Janine M 2 in Zoology

1. At a time of the day when the shadow of a vertical pole 20 ft. high is 28 ft. long, tree nearby casts a shadow 35 ft. long. How tall is the tree?

2. The ratio of similitude (or scale factor) between two similar triangles is 3:4. If the shortest side of the smaller triangle is 21 cm, what is the lenght of the shortest side of the bigger triangle?

3. The lenghts of the sides of a triangle 8, 10, and 12. The lenght of the shorter side of a similar triangle is 12. Find the lenghts of the other two sides.

4. The lenghts of the sides of a triangle are 14, 8, and 16. Find the perimeter of a second triangle similar to it, if the lenght of the shortest side is 12.

5. The perimeter of two similar triangles are 14 and 24. The lenght of an altitude of the first is 3. Find the lenght of the corresponding altitude of the second triangle.

6. Shad is 3 ft. from a lamppost that is 12 ft. high. If Shad is 5 1/2 ft. tall, How long is Shad's shadow?

2007-11-29 14:37:54 · 5 answers · asked by Anonymous in Mathematics

I have to make a car that is solemly powered by a mousetrap, this car has to go up a 30 degree hill, it has to be light...
But I would like to see if anyone has any good suggestions.
THANKS...

2007-11-29 14:37:50 · 1 answers · asked by MARIA16548 2 in Engineering

mass is 325 N
force is 425 N
angle is 35.2 degrees

needing to find the coefficent of the kinetic friction aka "myoo-k"

2007-11-29 14:37:34 · 1 answers · asked by MINAL 1 in Physics

I'm doing a math paper which requires me to find the pattern and formula for the following input/output function. Any help would be greatly appreciated.
input 2 output 1
input 3 output 2
input 4 output 4
input 5 output 8
input 6 output 16
input 7 output 48
input 8 output 80

(yes, I know the first few double, but that isn't consistent with the rest)

2007-11-29 14:37:20 · 1 answers · asked by Anonymous in Mathematics

I have that it is accurate but i am struggling or more reasons. Thanks in advance.

2007-11-29 14:36:16 · 6 answers · asked by soturin_tie 2 in Earth Sciences & Geology

math

2007-11-29 14:35:44 · 7 answers · asked by t n 1 in Mathematics

I need charts why they do so please tell me some websites or just answer question Thank-You!

2007-11-29 14:35:23 · 3 answers · asked by Haraki255 1 in Earth Sciences & Geology

2007-11-29 14:35:13 · 3 answers · asked by none 1 in Mathematics

2007-11-29 14:35:12 · 7 answers · asked by Anonymous in Medicine

Yes, I believe in UFO's ...We just can't be alone

2007-11-29 14:34:41 · 6 answers · asked by Anonymous in Astronomy & Space

The distance from Homeplate to the leftfield wall is 418.75 feet. baseball player hits the ball 3 feet above homeplate. PeeWee Reese is playing shortstop and he jumps and reaches 10 feet into the air but the ball clears his mit by a few inches. The ball travels out towards leftfield and goes over the wall by a foot and is a homerun. The left field wall is exactly 6 feet. The height of the ball varies quadratically with the distance from homeplate. a Baseball Diamond is a square with the sides 90 feet. Find a quadratic function describing the ball's homerun and determine the maximum height of the baseball.

2007-11-29 14:33:17 · 2 answers · asked by Melissa 1 in Mathematics

2007-11-29 14:32:53 · 5 answers · asked by fulleye22 1 in Mathematics

2007-11-29 14:32:45 · 1 answers · asked by Gio Lapid 2 in Chemistry

2007-11-29 14:32:31 · 9 answers · asked by Anonymous in Mathematics