Science & Mathematics - 31 October 2006

1.The following 2 lines intersect at point P:

4x-3y=6
4x-y=10

What are the coordinates of the point P?

A.(-2, -3)
B.(2, -3)
C.(-3,2)
D.(3,2)




2.What is the acute angle between the two lines mentioned in question 1?

A.22 * 50
B.157 * 10
C. 51 * 13
D. 128 * 47

2006-10-31 12:21:39 · 2 answers · asked by scienctist 1 in Mathematics

between metamorphic; sedimentary; igneous rocks...

2006-10-31 12:18:13 · 4 answers · asked by Ann 2 in Earth Sciences & Geology

Does 2 mL = 2cm cubed?

2006-10-31 12:17:20 · 8 answers · asked by imnbvcx2005 1 in Mathematics

hello, why does blood pressure go up and heartbeat go faster when i drink red wine? thanks for your answers...

2006-10-31 12:16:35 · 6 answers · asked by Dan S. White 2 in Medicine

with all the political, water bodies, cities, land areas...etc. Thanks!

2006-10-31 12:15:21 · 3 answers · asked by .:Blair:. 5 in Geography

12 noon? 12 pm? or...?

2006-10-31 12:09:10 · 10 answers · asked by snorkelman_37 5 in Other - Science

12 noon? 12 pm? or...?

2006-10-31 12:08:44 · 9 answers · asked by snorkelman_37 5 in Earth Sciences & Geology

Joe wishes to hang a sign weighing 750 N so that cable A, attached to the store, makes a 30 degree angle. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B, work please.

2006-10-31 12:07:56 · 2 answers · asked by Anonymous in Physics

True or False
1. Only square matrices have multiplicative identities
2. Some square matrices do not have multiplicative inverses

2006-10-31 12:07:35 · 1 answers · asked by someguy 2 in Mathematics

2006-10-31 12:07:15 · 25 answers · asked by cumeres 1 in Mathematics

Bob watches a flag being raised. He is 80 feet away from the bottom of the flag pole when the flag is on the ground, about to rise, and the angle of elevation is changing at a rate of 5 degrees per second.

How fast is the distance between the ground and the flag changing when the flag is 6 feet off the ground?

2006-10-31 12:05:36 · 1 answers · asked by GreaterFire 1 in Mathematics

2006-10-31 12:05:07 · 3 answers · asked by Larson D 1 in Chemistry

Well, this is my question, can you guys help me? well, that haida are not extinct, but i dont know where they are located at today, can you guys help me??

2006-10-31 12:04:28 · 1 answers · asked by jenette 3 in Earth Sciences & Geology

cyclohexandiol. Would you expect these compounds to be separable by TLC? Why
or why not?

2006-10-31 11:54:48 · 2 answers · asked by bbydiva 1 in Chemistry

2006-10-31 11:52:56 · 1 answers · asked by substance 2 in Chemistry

2006-10-31 11:51:48 · 5 answers · asked by ♥IslamForever♥ 5 in Earth Sciences & Geology

Im doing this project:
http://www.physics.rutgers.edu/~croft/cancrsh.htm
http://demoroom.physics.ncsu.edu/html/demos/283.html

Will placing the can on the bunsen burner to boil the water, melt the can?

2006-10-31 11:49:59 · 5 answers · asked by R B 3 in Chemistry

2006-10-31 11:49:48 · 4 answers · asked by Anonymous in Mathematics

2006-10-31 11:42:33 · 1 answers · asked by Gana S 1 in Engineering

A street lamp weighs 150 N. It is supported by two wires that form an angle of 120.0 degrees with each other. The tensions in the wires are equal.

a. What is the tension in each wire supporting the street lamp.
b. If the angle between the wires supporting the street lamp is reduced to 90 degrees, what is the tension in each wire.

Please help me show all the work involved in the steps.
I need help understanding it.

2006-10-31 11:38:49 · 2 answers · asked by swimmertommy 1 in Physics

2006-10-31 11:37:46 · 4 answers · asked by Brad 1 in Biology

2006-10-31 11:36:38 · 3 answers · asked by ☺Inquisitive 1☺ 3 in Chemistry

2006-10-31 11:31:20 · 8 answers · asked by steve 1 in Medicine

Q.) In a future hydrogen-fuel economy, the cheapest source of H2 will certainly be water. it takes 467kJ to produce 1 mol of H atoms from water. what is the frequency, wavelength, and minimum energy of a photon that can free an H atom from water?

V=E/h-->> { (467kJ)(10^3J/1KJ) (mol/6.022x10^23) / (6.626x10^-34) }
E=7.75x10^-19
V=1.17x10^15

Lamda=hc/E-->> { (6.626x10^-34J) (3.00x10^8) / (7.75x10^-19) }
Lamda=2.56x10^-7

So is this right?

2006-10-31 11:31:18 · 3 answers · asked by Anonymous in Chemistry

Also need to know: alpha-ketoglutarate to succinyl CoA

1. How many ATP's are produced through substrate-level
phosphorylation?

2. How many ATP's can be produced through chemiosmotic
phosphorylation (with ETC)?

Explain your answer.

2006-10-31 11:29:33 · 1 answers · asked by anna8613 1 in Biology

2006-10-31 11:29:09 · 2 answers · asked by substance 2 in Chemistry

2006-10-31 11:27:33 · 3 answers · asked by izad a 1 in Physics

This is a homework question for my sis, and my family is confused on it, can someone answer?

How the number of chromosomes in a cell produced by meiosis differs from that of a cell from the same organism produced by mitosis?

2006-10-31 11:23:05 · 7 answers · asked by Anonymous in Biology

Compare and contrast atoms and molecules. Y their similer amd different. please help

2006-10-31 11:22:36 · 8 answers · asked by crashanator11 1 in Chemistry

And do they mess around with the video's brought from space bcoz there are no stars at all... And if people can see them from the ground and not in space......then every one is wrong to what is out there witch means there are aliens out there you tossers

2006-10-31 11:21:53 · 7 answers · asked by BKSTYLE 1 in Astronomy & Space