Science & Mathematics - 13 November 2007

Ok for

H2S (aq) --> S(s) acidic I got
**** H2S + e- --> S +2H2

NO3-(aq) --> NO2- (aq) basic I got
**** 2NO3- --> 3NO2-+ 2e-

I-(aq) --> IO3- (aq) acidic I got
****i cant finish this one I2- +3H2) +e- --> IO3-+H2O

Im not sure on the rest either..I might have gotten the last one but im not sure....Please help me

VO2+ (aq) --> V3+ (aq) acidic

Cl2O7 (g) --> ClO2- (aq) basic

NO (g) --> NO3- (aq) acidic

NO2- (aq) --> N2(O2)2- (aq) basic

Se(O3)2- (aq) --> Se(O4)2- (aq) basic
***2e- +4SeO3 --> 3SeO4

2007-11-13 09:12:32 · 1 answers · asked by Anonymous in Chemistry

2007-11-13 09:11:58 · 12 answers · asked by canadiangeoguy 2 in Chemistry

(excluding objects belonging to solar system)

I mean if we transport some egyptian astronomer in time machine into XXI century, will he notice any difference?

2007-11-13 09:11:57 · 9 answers · asked by Alexander 6 in Astronomy & Space

is NH3 a:
a) nonpolar covalent bond
b) nonpolar ionic bond
c) polar covalent
d) ionic bond

2007-11-13 09:11:22 · 2 answers · asked by Anonymous in Chemistry

From the two assumptions that Special Relativity makes
1.) The laws of physics are the same in all inertial frames of reference. In other words, there are no privileged inertial frames of reference.
2.)Invariance of c - The speed of light in a vacuum is a universal constant, c, which is independent of the motion of the light source.

make a full theoretical derivation of the Lorentz factor, time dilation, mass and length dilation, and prove that E=m*c^2.

2007-11-13 09:08:54 · 1 answers · asked by Anonymous in Physics

north slope of alaska contains large fields of

2007-11-13 09:08:13 · 3 answers · asked by G 1 in Geography

A 105kg football player running due north at a speed of 9.5 m/s is tackled by an 80 kg player running in a direction 150 degrees east of north at a speed of 9 m/s. The collision occurs on wet astroturf- so you may ignore friction. In what direction do the entangled players move after the collision? At what speed do they move after the collision?

2007-11-13 09:07:25 · 1 answers · asked by jgill 1 in Physics

I am probably making this harder then it is but here:

A ball rolls with a constant velocity across a tabletop 0.950m high. It rolls off and hits the ground 0.352m horizontally from the edge of the table. How fast was the ball rolling when it left the table?

I need to know how you arrive at the answer, not just the answer, thanks.

2007-11-13 09:07:21 · 1 answers · asked by sui generis 2 in Physics

The table gives values for functions f and g, and their derivatives. Determine the given derivatives and
write down the formulas used.
the |' are not absolute values they are to divide each number like a table
x |0 | 1 | 2
f(x) | 5 | −1 | 4
g(x) | 2 | 2 | 0
f'(x) |−2 | 2 | 3
g'(x) | 5 | 6 | 0.5

(b)If H(x) = f(g(x)) then H'(1) = ? -24 i got it from chain rule 2(2)(-1)(6)

(c)If F(x) = e^(f(x)) then F'(1) = ? 0
(d)If G(x) = (f(x))^2 then G'(1) = ? -4 is it 2(-1)(2)
(e)If K(x) = sin (g(x)) then K'(2) = ? .5 i got it from sin(4)cos.5 because of chain rule

2007-11-13 09:06:35 · 1 answers · asked by ineedhelpbadly 2 in Mathematics

If the WORLD establishes an exact spot and an exact date and time, it does not matter what time but I would assume a date near the current date would make the most sense. This date and time is known world wide and it is the set place and time a person from the future must arrive to prove that time travel into the past was achieved. If said person does not show then we know the entire race was destroyed before we advanced far enough or we did not achieve time travel into the past, ever.

2007-11-13 09:05:31 · 3 answers · asked by Anonymous in Physics

And yes... there is something that has ALL the elements.
Correct or closest answer gets 10 pts.
Thanks!

2007-11-13 09:05:18 · 9 answers · asked by Anonymous in Chemistry

Microwaves are used to heat food in microwave ovens. The microwave radiation is absorbed by moisture in the food. This heats the water, and as water becomes hot, so does the food. How many photons having a wavelength of 3.00 mm would have to be absorbed by 1.00 g of water to raise its temperature by 1.00C? It takes 4.184 J of energy to heat this much water.

2007-11-13 09:04:42 · 2 answers · asked by G.G. 1 in Chemistry

what animal species why is it endangered any kind of animal

2007-11-13 09:04:00 · 3 answers · asked by tonypimp10 d 1 in Zoology

2007-11-13 09:02:02 · 14 answers · asked by Anonymous in Weather

I mean, like, Trish and me were playing with a Ouija board, and, like, we spoke to a space alien!! OMG!!

So, I mean, what do we do next?? I mean, I think I heard about SETI or something once at school???

2007-11-13 08:59:49 · 7 answers · asked by Jan O. 1 in Astronomy & Space

2007-11-13 08:59:02 · 6 answers · asked by Alan 2 in Biology

2007-11-13 08:59:00 · 1 answers · asked by emmiloulou 1 in Mathematics

I have heard that on Dec 21st 2012 when the Mian calender comes to an end that the poles on the earth will switch..in other words depending on the way the earth turns we the north american continent could become the North or South Pole, meaning the end of man kind. The Mians were a smart people and knew much more than i believe we do. If this is true it would be the end of our world as we know it today.......what do you think

2007-11-13 08:58:26 · 3 answers · asked by ~Aqua.. 4 in Earth Sciences & Geology

http://www.nrao.edu/pr/2006/mspulsar/

this is one of the things that really boggle my tiny little brain.... how can something spin that fast and NOT fly apart...yeah, I know, a double the size of our sun star is now twenty miles across.. great gravity!.... but.... this didn't turn into a black hole... why?... not big enuff?.... but it 'accretes' like a black hole would, right?.... so, are black holes spinning that fast or faster?....is that why SOME black holes spit out energy at the 'poles'?.....

2007-11-13 08:58:05 · 2 answers · asked by meanolmaw 7 in Astronomy & Space

all the 2's in this column its a small two. (square)
I
----------------------
I
a) x2-9x+14
b) x2+6x-16
c) x2-9x+20
d) x2-7x+12
e) y2-9y-10
f) a2+5a-24

2007-11-13 08:56:58 · 4 answers · asked by Linda-chica 1 in Mathematics

Does the OH become a carbonyl or does an E2 reaction occur where OH gets protonated by water and is lost as H30 and becomes a double bond between 2 and 3 carbon. On top, does the CN serve as the leaving group?

2007-11-13 08:56:25 · 1 answers · asked by Little Foot 3 in Chemistry

An elderly relative has suffered a stroke and now has difficulty moving her right arm and also has speech problems. Explain what areas of the brain were damaged to account for there problems.

2007-11-13 08:51:45 · 3 answers · asked by ♥ ♥ ♥ 2 in Biology

and how can i make 1 1/2 into a whole number?
This is what i got as a whole number 3!
Is that right?

2007-11-13 08:50:22 · 13 answers · asked by <3 2 in Mathematics

No matter what I do..i just can't burp. Yeah i know im a girl..but i just can't. I can drink gallons of rootbeer...nothing. I can feel the air coming up, but nothing happens.


Please don't just tell me to swallow air, and bring it back up..doesn't work.

helpp?!

2007-11-13 08:46:23 · 5 answers · asked by Anonymous in Biology

Please only answer this if you are positive of the answer. I am in Honors Physics. I need help with my homework dealing with Resonanve and Standing Waves. The first question is exactly this:
The speed of sound is 340 meters per second ^2. If one piece of a cut straw is 0.15 m in length what is the wavelength of the standing wave in the straw when the bottom hole of the straw was NOT covered?

What was the frequency of that wave?

What was the wavelength of the standing wave inside the tube when the bottom hole WAS covered?

Can someone please help me with these 3 problems? From there, I should be fine, but I just need help on the first couple. Thank you.

2007-11-13 08:46:16 · 1 answers · asked by Anonymous in Physics

Detailed please.

Explain how the energy of sunlight is transformed into biological energy of ATP. Begin with photosynthesis and end with Aerobic Respiration.

2007-11-13 08:45:48 · 1 answers · asked by Anonymous in Biology

2007-11-13 08:41:34 · 4 answers · asked by jerry r 1 in Astronomy & Space

Like Salvia divinorum or Spice or Spice gold? What do I do?

2007-11-13 08:38:42 · 14 answers · asked by Anonymous in Botany

answers please thankyou

2007-11-13 08:37:51 · 5 answers · asked by lol 1 in Biology

the more alkaline the solution the quicker the iodine decolourises?

2007-11-13 08:31:41 · 2 answers · asked by Queenie 4 in Biology