Science & Mathematics - 26 September 2007

how do you find oxidation numbers when you are given an equation etc..i know we're supposed to use the laws but sometimes i get confused. I am trying to find the oxidation number for AgNO3 and Fe(HCO3)2, can someone help ??

2007-09-26 06:28:27 · 4 answers · asked by Sskli D 1 in Chemistry

If the theory is correct.

2007-09-26 06:25:55 · 6 answers · asked by nuwambani 1 in Biology

When your parents conceive you, you get 23 chromosomes from each parent. But what has me stumped is whether or not it is possible that a sperm or an egg could individually contain MORE of one parent's code than the other's? Could, say, 18 of the genes in a SPERM CELL or EGG come from your mother, and then only 5 from your father?

For instance, if your father is half indian/half white and your mother is white, could you still get MORE indian genes than white genes from your father and thus be MORE than a 1/4 indian? Or do our sperm and egg cells each contain split amount of genes from our parents?

2007-09-26 06:21:47 · 3 answers · asked by Josh 1 in Biology

Has it been proven that a single-celled organism(eg amoeba) can evolve into a multi-cellular organism?

2007-09-26 06:20:10 · 3 answers · asked by clotho 2 in Biology

The goose has a mass of 24.4lbs and is flying at 9.00 (miles per hour). What is the kinetic energy of the goose?

2007-09-26 06:17:50 · 2 answers · asked by stranger 1 in Physics

2007-09-26 06:13:00 · 13 answers · asked by Mary D 1 in Agriculture

2007-09-26 06:10:54 · 1 answers · asked by Cassie 2 in Chemistry

I have to do a bunch of problems on congruence like the following below. I was wondering if anyone could explain how the following is done so that I have an example to look at for the others. Thanks in advance:

Find all incongruent solutions to the following congruence:

6x = 5 (mod 15)

2007-09-26 06:10:08 · 4 answers · asked by Anonymous in Mathematics

its to help me with my science work :)

2007-09-26 06:09:10 · 3 answers · asked by Cassie 2 in Chemistry

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 8420 N/C. The mass of the water drop is 3.10 10-9 kg.
(a) Is the excess charge on the water drop positive or negative?
(o) positive
(_) negative

Why?

(b) How many excess electrons or protons reside on the drop?

2007-09-26 06:05:21 · 1 answers · asked by Matt A 1 in Physics

What Time Passed Between 7:15 and 10:08?

Write 3 Fraction the same as 7 over 8?

Cancel Down 48 over 52?

Help Please and who can do all 3 Wins and I give top stars for u

2007-09-26 06:03:17 · 12 answers · asked by Kimmy 2 in Mathematics

2007-09-26 06:00:18 · 1 answers · asked by Anonymous in Mathematics

do we have the technology to completly revamp our country's service industry and eliminate back breaking heavy labor? do you see this technology arriveing any time in the future? what kind of machines, computers would be able to accomplish these things?

2007-09-26 06:00:16 · 2 answers · asked by curvy_chick000 4 in Other - Science

2007-09-26 05:59:27 · 6 answers · asked by Anonymous in Mathematics

a room of 70 deg fer., 50 pounds mass of air, and 10 pounds of mass of water vapor.. how do i calculate the energy needed to cool the air down to 55 deg. fer. .. plz i need help.. what equation do i use

2007-09-26 05:53:58 · 2 answers · asked by masrbobo 1 in Physics

I am going to be taking the CPAT test so I can be on my way to becoming a fire fighter but I have contacted people and asked questions but I cannot seem to get a good answer on to what I need to do after I pass the Test.

2007-09-26 05:51:36 · 3 answers · asked by twilightoftheidols1 1 in Other - Alternative

2007-09-26 05:50:34 · 11 answers · asked by The Global Geezer 7 in Other - Science

2007-09-26 05:50:23 · 5 answers · asked by madnsane 2 in Physics

2007-09-26 05:49:47 · 33 answers · asked by Anonymous in Astronomy & Space

Here's the problem....

A speed skater moving across frictionless ice at 8.40 m/s hits a 4.80-m-wide patch of rough ice. She slows steadily, then continues on at 5.70 m/s.

What is her acceleration on the rough ice?


I dont want the answer, I just want to know how to solve it. Its been bugging me that I cant find the solution to this problem. I have tried different methods and none of the answers I got were correct.

2007-09-26 05:49:18 · 3 answers · asked by Anonymous in Physics

I am doing a lab report on wave propogation, and the lab manual and the textbook both say that "a spherical wave has a spreading factor of 1/r", however everything I know about physics tells me that it should be 1/r^2. The lab question asks "what is the spreading factor for a 1-D wave? 2-D? 3-D?", which I would think would be 1, 1/r, and 1/r^2 respectively. Am I missing something here or is the book wrong?

2007-09-26 05:47:20 · 1 answers · asked by MooseBoys 6 in Physics

Two forces F_1 and F_2, act at a point. F_1 has a magnitude of 9.00 and is directed at an angle of 63.0 degrees above the negative x axis in the second quadrant. F_2 has a magnitude of 5.20 and is directed at an angle of 53.7 degrees below the negative x axis in the third quadrant.

2007-09-26 05:47:18 · 1 answers · asked by bg 1 in Physics

How far below an initial straight-line path will a projectile fall in one second? Is this depend on the angle of launch or on the initial speed of the projectile?

2007-09-26 05:45:46 · 3 answers · asked by Summer W 1 in Physics

a) Calculate the braking time

b) Calculate the deceleration of the aircraft

AS Physics questions, thanks.

2007-09-26 05:44:44 · 3 answers · asked by Anonymous in Physics

I have been taking fosamax for 7 years, although I have GERD.
Now my doctor says new information says you shouldn't take it for more than 5 years

2007-09-26 05:44:28 · 1 answers · asked by Catherine H 1 in Medicine

I'm being asked to find the wavelength in nm of three possible electronic transitions of Lithium. The three energies given are 178 kJ/mol, 370 kJ/mol, and 375 kJ/mol,

I can't figure out how to get the wavelength from this. I tried using L=hc/E but I end up getting something crazy

2007-09-26 05:44:18 · 3 answers · asked by Steven S 2 in Chemistry

4sin^2 x +2cos^2 x=3

Sinx=cos 2x

2007-09-26 05:43:57 · 2 answers · asked by MachoMan 4 in Mathematics

a) Calculate its acceleration

b) Calculate the distance it moves in this time.

AS Physics homework, I'm really stuck, thanks.

2007-09-26 05:42:22 · 4 answers · asked by Anonymous in Physics

sequence b(sub n), n=1,2,3... is strictly locally monotone if for every integer k>1 either b(sub k-1) < b(sub k) < b(sub k-1) OR b(sub k-1) > b(sub k) >b(sub k+1).
Prove it is strictly monotone or give counterexample.

2007-09-26 05:41:24 · 2 answers · asked by mandy 1 in Mathematics

the numbers are supposed to be subscripts*

2007-09-26 05:40:33 · 1 answers · asked by cr_unk420 1 in Chemistry