Science & Mathematics - 28 November 2007

100,000 mpc
1950 mpc
40 mpc
2050 mpc
0.025 mpc

2007-11-28 14:16:34 · 1 answers · asked by webb_ar 1 in Astronomy & Space

Basically, if you are conducting the Faraday experiment where you slide a magnet through a coil of wires, but, at the same time, there is already electricity flowing through the wire, then what happens. What would happen to the magnetic field being formed by the electricity flowing the coil, could it possibly spread? If anything does happen, will it continue to happen if the magnet is places in a non moving position or will it only happen in the presence of a moving magnetic field?

2007-11-28 14:15:20 · 1 answers · asked by megamak93 1 in Physics

2007-11-28 14:14:57 · 8 answers · asked by anonymous 2 in Mathematics

Write a balanced equation for each of the following reactions. Then classify each as: synthesis (S), decomposition (D), combustion (C), single displacement (SD), or double displacement (DD).

____1. Solid iron(III)hydroxide breaks into solid iron(III) oxide and water vapor when heated

Balanced equation:

____2. Ammonia gas (NH3) plus sulfuric acid yields aqueous ammonium sulfate.

Balanced equation:

____3. Magnesium and nitric acid react to produce and aqueous solution of magnesium nitrate and hydrogen gas

Balanced equation:

____4. Solid calcium nitrate reacts with hydrochloric acid to create nitric acid and aqueous calcium chloride.

Balanced equation:

2007-11-28 14:14:15 · 1 answers · asked by pegasus_puck 4 in Chemistry

Appreicate it if someone could show me how to work the following problem: Thanks alot!

Knowing that the label for entropy is J/mol K determine the entropy of vaporization of methanol. THe boiling point of methanol, CH3OH, is 64.6 degrees C and the enthalphy of vaporization is 35.21 mol.


(K = C + 273)

2007-11-28 14:13:20 · 1 answers · asked by a_chamarthy 2 in Chemistry

Hi there,
I'd like to ask for help on balancing calcium hydroxide + aluminum chloride. What is the formula for the first part? Any help will be greatly appreciated. Thanks.

2007-11-28 14:11:19 · 4 answers · asked by Quasar 2 in Chemistry

-no nuclei heavier than helium could form since there werent any electrons formed
-no stable nuclei exist with masses of 5 or 8 hydrogen masses
- the temperature and density were too low
-the helium nucleus is unstable
- all heavy nuclei are unstable

2007-11-28 14:10:06 · 13 answers · asked by webb_ar 1 in Astronomy & Space

I'm told that the sun with a mass of 1 and a luminosity of 1 is expected to live 10 billion years......

Then what is a star with a mass of 50 and a luminosity of 40,000 supposed to live?

The expected answer is approximately 1million years but the best i've come up with is 12.5million

anyone have any insight?

2007-11-28 14:09:36 · 3 answers · asked by John r 2 in Astronomy & Space

Suppose you have an examination with R questions on it. Suppose each question requires you to know F pieces of information in order to get it right. (and there are F pieces of info for each question, i.e. you need to get all the parts right to get the question right)

Can you write a closed formula to calculate the probability of getting C questions correct if you know L pieces of information out of the total F*R?
Or, can you write a closed formula to calculate the probability of having known L pieces of information given that you got C questions correct? (then you can flip it with Bayes' Theorem to the first one)

The answer must be valid for F and R being any positive integers. I'd also need to know why the formula works. Thanks in advance!

2007-11-28 14:08:05 · 1 answers · asked by Anonymous in Mathematics

please i need an answer today or tommorow

2007-11-28 14:06:33 · 5 answers · asked by thefernteam 2 in Astronomy & Space

CH3CH2CH2CH2OH -----> CH3CH2C[triple bond]CH

I need a multistep synthesis :) I'm a little lost on the terms still - I kinda get what I'm doing, but when it comes to what reagents remove what- I'M COMPLETELY LOST - so explainations on what it's doing to the compound would be great!!!!

thanks!

2007-11-28 14:05:55 · 3 answers · asked by Anonymous in Chemistry

i don't understand this...at all. work please.

(3 sin X + cos 3X) / (cos X - sin X) = 1 + 2 sin 2X

i'm supposed to solve/prove the identity?

2007-11-28 14:05:11 · 1 answers · asked by bluenecklace 2 in Mathematics

What long term effects does beach erosion cause?

2007-11-28 13:58:01 · 1 answers · asked by Anonymous in Earth Sciences & Geology

What is the speed of this wave?

2007-11-28 13:57:02 · 4 answers · asked by Anonymous in Physics

2007-11-28 13:55:38 · 15 answers · asked by cspanik21 1 in Astronomy & Space

does Chemical engineering have a good part in a company??

what chemical engineering can do in a company??
what kind of job can chemical engineering get in the company?


please list as much as possible..

thank you..

2007-11-28 13:51:31 · 3 answers · asked by ideasodabsbskla 2 in Chemistry

Show that the only closed and open subsets of R are the empty set and R itself.

2007-11-28 13:49:50 · 1 answers · asked by moshi747 3 in Mathematics

2007-11-28 13:49:32 · 1 answers · asked by J 4 in Mathematics

2007-11-28 13:47:33 · 3 answers · asked by Chan Y 1 in Biology

2007-11-28 13:46:03 · 4 answers · asked by funnybonez93 2 in Mathematics

2007-11-28 13:45:37 · 10 answers · asked by bantugan 2 in Astronomy & Space

Also, can it happen more than once per month ever?

2007-11-28 13:43:14 · 7 answers · asked by Anonymous in Astronomy & Space

Only a scientific answers plz. that means on supernatural ones

2007-11-28 13:43:02 · 3 answers · asked by Tedd m 3 in Astronomy & Space

Help to solve.
Thank you!!

2007-11-28 13:42:11 · 5 answers · asked by Michele 1 in Mathematics

- square root of 256. the symbol is given for square root. Will the answer will be -16 or not a solution? if something else, what is it then?

2007-11-28 13:41:37 · 4 answers · asked by Anonymous in Mathematics

Describe how we could possibly significantly reduce 10 of: Food, Tobacco and alcohol, clothing, Packaging, Recreation Equipment, Books and magazines, Furniture and appliances, Private transportation, Construction, Personal care, Entertainment, Health care etc.

Please please please, help me. I won’t copy, don’t worry. I am honest. Thanks in advance.

2007-11-28 13:40:51 · 4 answers · asked by dkhgvusdygv 1 in Geography

(t(12((t^2)-1)^5))-(((t^2)-1)^6)/(t^2)
this is what i have so far and my computer says its not right...can anyone help me please!!!

2007-11-28 13:40:49 · 3 answers · asked by peaceout34453 1 in Mathematics

would you get the same answer?

2007-11-28 13:37:01 · 2 answers · asked by a 3 in Mathematics

Types of Reactions

Write a balanced equation for each of the following reactions. Then classify each as: synthesis (S), decomposition (D), combustion (C), single displacement (SD), or double displacement (DD).

_______ 1. ____ Na(s) +____ H2O(l) → ____ NaOH(aq) + ____ H2(g)
_______ 2. ____ CO(g) + ____ O2(g) → ____ CO2(g)
_______ 3. ____ FeS(s) + ____ HCl(aq) → ____ FeCl2(aq) + ____ H2S(g)
_______ 4. ____ NaNO3(s) → ____ NaNO2(s) + ____ O2(g)
_______ 5. ____ CH4(g) +____ O2(g) → ____ CO2 + ____ H2O
_______ 6. ____ Fe(s) + ____ CuNO3(aq) → ____ Fe(NO3)2(aq) + ____ Cu(s)
_______ 7. ____ KI(aq) + ____ Cl2(g) → ____ KCl(aq) + ____ I2(aq)
_______ 8. ____ Al(s) + ____ S(s) → ____ Al2S3(s)
Decompostion? 9. __2__ KClO3(s) → _2__ KCl(s) + _3__ O2(g)
_______10. _2__ C4H10(g) + __18_ O2(g) → _8__ CO2(g) + _10__ H2O(g)
11. Zinc metal reacts with aqueous silver nitrate to produce solid silver and an aqueous solution of zinc nitrate.

Balanced Equation:

2007-11-28 13:36:32 · 1 answers · asked by pegasus_puck 4 in Chemistry

Ok here is a problem I'm faced with. 14,000 m2 = ? km2

Fourteen thousand meters squared is equal to blank kilometers squared.

I need intsrutions on how to do this. I'm completley confused.

2007-11-28 13:35:44 · 2 answers · asked by Shello 3 in Mathematics