Science & Mathematics - 2 January 2007

Can we seperate Heat and Light? i.e Is light always accompanied by Heat? Is there somthing called "cold light"?

2007-01-02 14:20:44 · 3 answers · asked by stravis 2 in Physics

I am stuck on these problems and my textbook barely mentions anything about net ionic equations. Does anyone know the net ionic equation for the following:

1) Solid calcium carbonate is heated in a vacuum.
2) Equal volumes of equimolar solutions of phosphoric acid and calcium hydroxide are mixed.
3) Powdered strontium oxide is added to distilled water.
4) Chlorine gas is bubbled through a solution of potassium bromide.
5) Carbon monoxide gas is passed over hot iron(III) oxide.

Also, what is the significance of distilled water in net ionic equations? I have a couple net ionic equations regarding distilled water...And if you have any helpful websites on net equations, please give me the link. Thanks!

2007-01-02 14:20:24 · 2 answers · asked by melissa 1 in Chemistry

I need to know the volume of each of these.

#1 The diameter is 24'

#2 The diameter is 12'

If you can't answer don't bother trying I need real answers.

2007-01-02 14:20:00 · 11 answers · asked by Anonymous in Mathematics

2007-01-02 14:19:57 · 2 answers · asked by tanner p 1 in Mathematics

There are two major products of photosynthesis—water and organic substances such as glucose. How would the presence of DPIP (2,6-Dichlorophenol-Indophenol, electron accepting compound) affect the production of oxygen during the light reaction? How would the presence of DPIP affect the production of organic product during the dark reaction?


What role did another artificial electron acceptor, ferricyanide, play in elucidating the process of photosynthesis?

2007-01-02 14:18:52 · 2 answers · asked by dthepoolpro 1 in Biology

The following are posible answers: Pie/12 ; Pie/ 6 ; Pie/4 ; Pie/3; and 2Pie/3.......please show your work because I wan't to know how to do it....thank you

2007-01-02 14:18:41 · 1 answers · asked by fedora_off 1 in Mathematics

How does the gravity get out of the black hole?

2007-01-02 14:17:39 · 7 answers · asked by Anonymous in Physics

What is the derivative of y = [(e^-x) - (e^x)]^3

2007-01-02 14:17:14 · 4 answers · asked by SkankinMangos 1 in Mathematics

thank you very much

2007-01-02 14:16:17 · 2 answers · asked by lisa d 1 in Chemistry

after solving it in the complex field, it also needs to be factorised in the real and rational fields.

thanks in advance =)

2007-01-02 14:14:15 · 4 answers · asked by Anonymous in Mathematics

i know i've already asked this question but i didn't really get a good answer... so what is a strong and weak base? and what is the major difference between them? please help.

2007-01-02 14:13:59 · 4 answers · asked by Anonymous in Chemistry

HF- hydrogen bond
NH3- hydrogen Bond

C02
Kcl
N2
H2
liF(aq)
NH4
CCL4
KBr(aq)

2007-01-02 14:13:36 · 1 answers · asked by chigusa 1 in Chemistry

The "long method" that I'm saying is:
f(x) = [(x)^(5/3)]
f(x + h) = ?
f(x + h) - f(x) = ?
[f(x + h) - f(x)] / h = ?
limit of {[f(x + h) - f(x)] / h} as h approaches 0 = ?

f(x) = [(x)^(4/3)]
f(x + h) = ?
f(x + h) - f(x) = ?
[f(x + h) - f(x)] / h = ?
limit of {[f(x + h) - f(x)] / h} as h approaches 0 = ?

2007-01-02 14:13:18 · 2 answers · asked by dreamcatcher 2 in Mathematics

I want to know is anyone knows any of these science questions?

1. How many chromosomes are in a human?
2. How many cromosomes are in an egg or sperm?
3. How many chromosomes are in a potato?
4.How many cromosomes are in a potatoes sex cells?
5. How many cromosomes are in a Chimpanzee?
6. How many chromosomes are in a chimpanzee's sex cells?

2007-01-02 14:13:04 · 4 answers · asked by HOTTIE 101 2 in Biology

2007-01-02 14:12:26 · 2 answers · asked by sexy cee 1 in Mathematics

type of bond formed?

a- metallic
b - nonpolar covalent
c - ionic
d - polar covalent

2007-01-02 14:12:00 · 2 answers · asked by lisa d 1 in Chemistry

2007-01-02 14:11:19 · 7 answers · asked by Anonymous in Mathematics

The "long method" that I'm saying is:
f(x) = [(x)^(5/3)]
f(x + h) = ?
f(x + h) - f(x) = ?
[f(x + h) - f(x)] / h = ?
limit of {[f(x + h) - f(x)] / h} as h approaches 0 = ?

f(x) = [(x)^(4/3)]
f(x + h) = ?
f(x + h) - f(x) = ?
[f(x + h) - f(x)] / h = ?
limit of {[f(x + h) - f(x)] / h} as h approaches 0 = ?

2007-01-02 14:11:05 · 2 answers · asked by dreamcatcher 2 in Mathematics

are Zygotes mutlicellur, diploid or gametes?

2007-01-02 14:10:47 · 4 answers · asked by Anonymous in Biology

How comes they defy gravity with their center of mass vertical falling well outside their only support and not falling?
Vector explanations are counter intuitive. I accept them but deep inside something does not convince me completely.
Please help.

2007-01-02 14:09:22 · 4 answers · asked by PragmaticAlien 5 in Physics

How are each createdd in the shape and form they are?

2007-01-02 14:09:02 · 3 answers · asked by Tom 2 in Weather

what is the smallest value in the range of g(x)

2007-01-02 14:07:00 · 1 answers · asked by Anonymous in Mathematics

I have tryed Every diet known to man practicly I weigh 398 lbs I have Severe arthritis in my knees because of it i have a 4month old baby boy, My doctor said that this surgery could save my life i have heard horror storys about the band but the Bypass surgery is varry complex and has allot of risks to it What is your opinions on these two options?

2007-01-02 14:05:57 · 25 answers · asked by angel_of_death_32x 1 in Medicine

2007-01-02 14:05:44 · 6 answers · asked by Tommy W 1 in Astronomy & Space

2007-01-02 14:04:38 · 5 answers · asked by chasity g 1 in Physics

i know one would be it is a good conducter of electricity, but what would the other be, and how would metallic bonding between coppet atoms account for each of the propeties?

2007-01-02 14:02:34 · 5 answers · asked by lisa d 1 in Chemistry

I always heard in school that black people have an extra muscle in there legs, thats why they can jump so high and run really fast..

I dont believe this tho but what ever...

2007-01-02 14:02:31 · 4 answers · asked by Aaron T 2 in Medicine

For example, if i run really hard or i dance really hard, i throw up. I feel really embarrassed and bad about myself. Am i alone at this? By the way, it has nothing to do with being in shape, i'm always been a vomiter.

2007-01-02 14:00:19 · 8 answers · asked by Lady C 2 in Medicine

2007-01-02 13:59:06 · 6 answers · asked by Anonymous in Biology

When I say "teh importance of electrons in photosynthesis" I know electrons are important for basically everything because they consist in every piece of matter. But, Why is it important for sunlight to excite the elctrons from H20... How do the H ions have an effect on photosynthesis? I understand the process, I just don't know the extended mechanics of it! THANKS FOR ANSWERING! YALL ARE DA BEST!

2007-01-02 13:58:22 · 4 answers · asked by Upon this rock 3 in Biology