Science & Mathematics - 27 October 2007

2007-10-27 12:15:44 · 1 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-27 12:12:52 · 12 answers · asked by Anonymous in Earth Sciences & Geology

please thank you

2007-10-27 12:10:57 · 5 answers · asked by Anonymous in Mathematics

I'm trying to solve a problem, but I can't get the right answer. (Hint. It's -3)

Below is the problem.

Double Integral (x-3y)dA, where R is the triangular region with vertices (0,0), (2,1), (1,2); x= 2u +v, y = u+2v

Please help. I'm trying to study for a midterm.

2007-10-27 12:10:25 · 1 answers · asked by Anonymous in Mathematics

2007-10-27 12:00:05 · 4 answers · asked by Benjamin R 1 in Mathematics

2007-10-27 11:54:33 · 4 answers · asked by common!!!!!! 1 in Weather

filter salt water from the oceans so that the treated water can be piped or transported to the States in need ?

2007-10-27 11:54:21 · 8 answers · asked by Anonymous in Engineering

I'm doing a stats project and I must determine whether the info. regarding boating fatalities in TN in 2006 as reported by the Tennessee Wildlife Resource Agency is significantly different from the same information as reported by the US Coast Guard. So the question is, what is my dependent variable, and what are the independent variables.

Thanks in advance!

2007-10-27 11:53:44 · 3 answers · asked by sheepsoup2000 1 in Mathematics

a cat running a horizontal surface jumps off a roof 5.8 meters away. he grabs a building 3.7 meters below his starting point. what is his initial velocity?

2007-10-27 11:53:18 · 2 answers · asked by magna1211@sbcglobal.net 1 in Physics

2007-10-27 11:50:49 · 3 answers · asked by Bobby S 3 in Mathematics

2007-10-27 11:49:45 · 13 answers · asked by Loki 1 in Mathematics

help please i need help

2007-10-27 11:48:24 · 8 answers · asked by dancemagic95 2 in Mathematics

expand and simplify where possible, then determine the degree of the polynomial answer a) (y-4)(y^2+2y+4) b) 4(x+2)(x+6) c)3x(4x-5) d) 2(3x+9)+4(x+5) e) 5y(y-3)-4(y^2+2y+4)

2007-10-27 11:46:23 · 3 answers · asked by mauz a 1 in Mathematics

I can not do any of these problems and have been stuck for the past 2 weeks....help please!

2007-10-27 11:46:19 · 9 answers · asked by Tristin B 1 in Mathematics

The combustion of 0.1571 g benzoic acid increases the temperature of a bomb calorimeter by 2.67°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.)

a. A 0.2170 g sample of vanillin (C8H8O3) is then burned in the same calorimeter, and the temperature increases by 3.29°C. What is the energy of combustion per gram of vanillin?


b. What is the energy of combustion per mole of vanillin?

2007-10-27 11:43:22 · 1 answers · asked by Anonymous in Chemistry

A balloon filled with 31.9 mol helium has a volume of 715. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 68.0°C as it expands to a volume of 893. L, the pressure remaining constant. Calculate q, w, and E for the helium in the balloon. (The molar heat capacity for helium gas is 20.8 J/°C·mol.)

2007-10-27 11:42:45 · 1 answers · asked by Anonymous in Chemistry

Consider the 74 N weight held by two cables shown. The left hand cable is horizontal.

http://img120.imageshack.us/img120/3038/111if3.jpg

What is the tension in the cable slanted at an angle of 53 degrees. Answer in N

What is the tension in the horizontal cable? Answer in N

2007-10-27 11:40:09 · 2 answers · asked by XzoeyX 2 in Mathematics

consecutive positive integers such that the product of the first and fourth is four less than twice the first multiplied by the fourth.

2007-10-27 11:38:13 · 4 answers · asked by Andreas 1 in Mathematics

about electromagnetic waves and general situations of using electromagnetic

2007-10-27 11:36:43 · 2 answers · asked by Anonymous in Physics

2007-10-27 11:30:56 · 16 answers · asked by Bob L 1 in Physics

Determine if each of the following relations is an equivalence relation. If
yes, explain your answer and give equivalence classes. If no, explain why.


(i) R1 = {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3) (3, 1), (3, 2), (3, 3), (4, 4), (5, 5) }




(ii) R2 = {(1, 1), (1, 2), (1, 3), (1, 4), (2, 1), (2, 2), (3, 1), (3, 3), (4, 1), (4, 4), (5, 5)}

2007-10-27 11:30:55 · 2 answers · asked by simonkf2002 1 in Mathematics

Prove this identitys:
1.sin 8(a)=8*sin(a)*cos(a)*cos(2a)*cos(4a)
2.cos 3(a)=4*cos^3(a)-3*cos(a)

2007-10-27 11:30:01 · 1 answers · asked by Amir B 1 in Mathematics

T(x)={ cx^2-2x , if x >/= 2;
{ x^3-cx , if x> 2

2007-10-27 11:26:00 · 1 answers · asked by nickesha t 2 in Mathematics

explain how hormones cause the reponse in plants for the following physiological responses:
Increase in height?
Adjustment to lack of water??
please help..

2007-10-27 11:25:46 · 1 answers · asked by Heena 1 in Botany

This is the problem I am having a really hard time with. I appreciate everyone's help.

3x^3y^4z^-2 / 6x^-1y^3z^-3

I am also still having a hard time with these:

7. (25x3)^2/3 / (125xy2)^1/3

9. (2s + 5z)2 (s + 3z)2

Divide
10. (2x^3-x^2+3x-1) / (x+2)

Please help me. I am in an on-line school and I have just a couple of weeks left with this class. I barely use math (which is why I am bad) and this is my last math class. Please help!!!!!

2007-10-27 11:23:17 · 2 answers · asked by Hope P 1 in Mathematics

On cadavers, how can you tell Nerves from blood vessels?

I mean other than remembering that a given nerve's location relative to other structures and blood vessels, can you just look at a nerve and tell that it is a nerve?

2007-10-27 11:22:22 · 4 answers · asked by Roberto 3 in Medicine

2007-10-27 11:15:48 · 6 answers · asked by oldmountaingeezer 2 in Astronomy & Space

2007-10-27 11:15:41 · 5 answers · asked by vijaya 1 in Earth Sciences & Geology

2007-10-27 11:15:27 · 4 answers · asked by Ronny A 1 in Mathematics

i saw this orange spider with a yellow rear with black marks on it heres a link with the only picture i could find of it. http://www.fredmiranda.com/hosting/showphoto.php?photo=37434 can anyone tell me what it is?

2007-10-27 11:13:01 · 3 answers · asked by Anonymous in Zoology