Science & Mathematics - 8 October 2007

and the same thing except for OXYGEN

2007-10-08 07:01:21 · 2 answers · asked by Kevin L 2 in Chemistry

How many of them will also be odd? Please include workings and explanations. thanks

2007-10-08 06:57:45 · 4 answers · asked by enp. 1 in Mathematics

the reciprocal 1/f:[0,1]-->R is bounded.

2007-10-08 06:56:55 · 3 answers · asked by han 1 in Mathematics

-1/2sin2xtan2x

2007-10-08 06:56:36 · 3 answers · asked by Anonymous in Mathematics

2007-10-08 06:56:07 · 3 answers · asked by Kai K 1 in Engineering

calcium carbonate
sodium hydroxide
hydrochloric acid
nitriz acid
ammonia
alumium oxide
glucose
methall
copper chloride


this would really help with my work, i'd give millions of points to who ever helps me!*
thankyou!


*u only get ten points

:)

2007-10-08 06:55:22 · 6 answers · asked by ALBSTERboomer 3 in Chemistry

ii need help with this please help

1. What are some minerals mined in the u.s
2 what are some of the minerals mined in New York
3. In the u.s what are the states that have a Lou dance of natural resources?
4. is petroleum a renewable resource?
5. What is the OPEC?


and number 3?? what is Lou dance or loundane?

first one of the first 3 2 answer get picke best


THANKS

2007-10-08 06:54:19 · 1 answers · asked by Anonymous in Earth Sciences & Geology

free surface of a large water reservoir that can supply water at a rate of 1500 kg/s steadily. Determine the power generation potential

2007-10-08 06:53:51 · 1 answers · asked by Kai K 1 in Engineering

how can made magnesium chloride from magnesium suphate Thank you

2007-10-08 06:51:54 · 1 answers · asked by U68Y 2 in Chemistry

This is for my honors bio. homework

and i like dont get it
she said hint: its not melting.


and i dont
know what it is so
help please :]

2007-10-08 06:51:24 · 6 answers · asked by Anonymous in Chemistry

Please help me figure out this problem...how do I set it up?

2007-10-08 06:50:26 · 5 answers · asked by flatfoot 3 in Mathematics

2007-10-08 06:50:05 · 3 answers · asked by Bollingg1 2 in Weather

for some reason i have gone brain dead at the moment and forgot completely on how to do this.. im looking at like its easy but... its one of those days

2007-10-08 06:49:19 · 10 answers · asked by Nick 4 in Mathematics

My problem is 20(1/2 x 35)

2007-10-08 06:48:26 · 10 answers · asked by modern_elegance 2 in Mathematics

An adventurous archaeologist crosses between two rock cliffs, with a raging river far below, by slowly going hand-over-hand along a rope stretched between the cliffs. He stops to rest at the middle of the rope. The rope will break if the tension in it exceeds 2.50 x 10^4 N, & his mass is 90 kg.

(a) If the angle theta is 10.0°, find the tension in the rope.

(b) What is the smallest value the angle can have if the rope is not to break?

2007-10-08 06:47:30 · 1 answers · asked by Johnny 1 in Physics

What are the concentrations of HSO4^- , SO4^2- , and H^+ in a 0.21 M HKHSO4 solution? (Hint: H2 SO4 is a strong acid; Ka for HSO4^- = 1.3 x 10^-2)

2007-10-08 06:47:23 · 1 answers · asked by Tiffany 4 in Chemistry

what is the range of the function f ( x ) = xsquared + 4 when the domain is (-2, 5, 7 )?? please help me by clearly stating the steps. thanks!!!!!!!!

2007-10-08 06:46:08 · 7 answers · asked by Anonymous in Mathematics

Controversy on the risks and benefits of Kevlar? What are the indirect risks?
Is there a similar product that exists? And what are the better ways to manufacture/dispose of Kevlar?

Any answers would be greatly apprecitated. Thanks

2007-10-08 06:44:40 · 3 answers · asked by Anonymous in Engineering

The active agent in many hair bleaches is hydrogen peroxide. The amount of hydrogen peroxide in 17.0 g of hair bleach was determined by titration with a standard potassium permanganate solution.
2 MnO4-(aq) + 5 H2O2(aq) + 6 H+(aq) 5 O2(g) + 2 Mn2+(aq) + 8 H2O(l)

4.73X10^-3 moles of MnO4 and1.18X10^-2 moles of H2O2

2007-10-08 06:39:58 · 1 answers · asked by Anonymous in Chemistry

well...........


does it?!?!?!?!?!?!

2007-10-08 06:39:11 · 9 answers · asked by george 1 in Botany

how do I get started and finish the problem correctly?

2007-10-08 06:38:37 · 4 answers · asked by referencearea 2 in Mathematics

Let G be a group and H a subgroup of G. Define N(H) = {x is an element of G | xHx^-1 = H}. How can you prove that N(H) is a subgroup of G?

2007-10-08 06:38:06 · 1 answers · asked by Anonymous in Mathematics

I've seen a really beautiful and strange insect around my neighborhood, in yards and by the park. It's about an inch long and is shaped like a big ant. It's a deep sapphire-blue/black with black wings. Sorry I have no picture, it's always gone by the time I get my camera.

The first time I saw it I thought it might be a queen ant due to its size and shape, but I've seen several now and I didn't think queen ants would be out and about that much. I went most of my life without ever seeing one and now I've seen this about five times. But I'm no expert.

Any suggestions where I could start looking up what it may be?

2007-10-08 06:36:17 · 2 answers · asked by KC 7 in Zoology

The given point (-2,9) lies on the graph that is symmetric about x-axis, y-axis, and origin. State the other points that must also lie on the graph

2007-10-08 06:32:37 · 7 answers · asked by referencearea 2 in Mathematics

a virus
a chemosynthetic bacterium
an amoeba
a mushroom
a paramecium
a sporozoan
a red algae
a slime mold

2007-10-08 06:30:03 · 6 answers · asked by Anonymous in Biology

least positive values of x at which these occur.

a) y = 5-4sin(x+30°)

b) y = 8-3cos²x

c) y = 60 / [(1+sin²)(2x-15°)

AHHHHHHHH
I have a love hate relationship with maths.

2007-10-08 06:27:15 · 1 answers · asked by Anonymous in Mathematics

a jackass penguin is real!
lives in africa

2007-10-08 06:23:49 · 1 answers · asked by Anonymous in Zoology

2007-10-08 06:22:05 · 7 answers · asked by Anonymous in Paranormal Phenomena

Steps on solving this?
3x-2y-3x

2007-10-08 06:21:32 · 2 answers · asked by Anonymous in Mathematics

2007-10-08 06:20:50 · 1 answers · asked by abc123 1 in Earth Sciences & Geology