Science & Mathematics - 11 November 2007

Find values of a and b such that
(2+√3)(4-√3)=a+b√3

2007-11-11 10:07:09 · 3 answers · asked by dominion_vortar 2 in Mathematics

The divice reads your body laugage it measures sweet pulse Respiration,
and is they divice is programed to identify 5000 thoughts I asked 5000 people online what they are thinking and what is thier pulse respiration each a eager person pulse will be high and he will be sweaty.... i could go on and on but

if two people put the divice in thier ear and if they think of a thought and really focus on it and really concentraits the divice transmits it to the other person

what do i do now ? to get my invention out thier

2007-11-11 10:05:02 · 7 answers · asked by Anonymous in Engineering

2007-11-11 10:04:32 · 2 answers · asked by miyshoe 4 in Mathematics

solve the equation:

3 cosec x + 8 cos x = 0

for x the interval is 0< x < 180

please could you briefly tell wats goin on each step..thnxs!

2007-11-11 10:03:06 · 1 answers · asked by clueless 1 in Mathematics

1. Mg2+, O2-
2. Mg2+, Se2-
3. Mg2+, S2-

2007-11-11 10:02:58 · 2 answers · asked by Jessica F 1 in Chemistry

ok, it's been so long that i've done these. solve(in steps), without converting the mixed number into an improper fraction. thanks.

1) 2 - 5 2/3=?
2) 3 - 4 4/6=?

2007-11-11 10:00:36 · 3 answers · asked by Papi Tony 3 in Mathematics

enormous battery? Or could the energy stored never be enough to offset the energy used in the retrieval so it can be brought to earth?

2007-11-11 09:51:09 · 5 answers · asked by Anonymous in Other - Science

2007-11-11 09:48:09 · 2 answers · asked by maxpowerrys 1 in Astronomy & Space

Is there a way to avoid getting those annoying shocks of static electricity when you touch something metallic? Is it more a factor of clothing you wear or how hairy you are :)

2007-11-11 09:45:00 · 6 answers · asked by Anonymous in Engineering

Consider the reaction:

H2O(g) + CO(g) = H2(g) + CO2(g)

Which of the following statements are true and which are false.

When Q > K the system will spontaneously shift to the left.


1 mol of H2O(g) and 1 mol of CO(g) are placed in a vessel and 1 mol of H2(g) and 1 mol of CO2(g) are placed in another of equal volume. At equilibrium, at 350°C, the amounts of CO(g) in the two vessels are equilvalent.


At equilibrium, individual molecules may be subject to rapid chemical transformations.


At equilibrium, the overall composition of the reaction mixture is not changing.


Amounts of all reactants and products corresponding to an exact equilibrium composition for this reaction are sealed in a vessel. The CO placed in the vessel is labelled with 14C. After an indefinite period of time 14C may be found in both CO and CO2 molecules.


The equilibrium constant is independent of the initial concentrations.

2007-11-11 09:42:36 · 2 answers · asked by vik s 1 in Chemistry

2007-11-11 09:42:22 · 13 answers · asked by Angel 1 in Mathematics

At a certain temperature K = 1.10×103 for the reaction:

Fe3+(aq) + SCN-(aq)= FeSCN2+(aq)

1.90×10-1 mol of Fe(NO3)3 is added to 1.27 L of 1.57×10-2 M KSCN.

Neglecting any volume change and assuming that all species remain in solution--:

Calculate the equilibrium concentration of Fe3+ (in mol/L).



Calculate the equilibrium concentration of SCN- (in mol/L).


Calculate the equilibrium concentration of FeSCN2+ (in mol/L).

2007-11-11 09:42:17 · 2 answers · asked by vik s 1 in Chemistry

This is what is says in my packet:

We can get energy (NRG) from digesting carbohydrates, lipids and proteins. What 3 elements are found in lipids?

Would 2 answers be Trace and Structural?

If you could answer this, it would be the greatest thing ever. Thank you.

2007-11-11 09:38:11 · 4 answers · asked by bmredhead24 2 in Biology

what is the net ionic equation and total ionic equation

2007-11-11 09:37:26 · 1 answers · asked by vidhu m 1 in Chemistry

At a particular temperature, Kp = 0.390 for the reaction

N2O4(g) = 2NO2(g)

A flask containing only NO2(g) at an initial pressure of 9.60 atm is allowed to reach equilibrium. Calculate the total pressure in this flask at equilibrium.



With no change in the amount of material in the flask, the volume of the container in question is increased to 2.000 times the original. Assuming constant temperature, calculate the (new) total pressure, at equilibrium.

2007-11-11 09:35:43 · 1 answers · asked by vik s 1 in Chemistry

Please go to http://flickr.com/photos/10327708@N08/ in order to see the picture. This photo was taken in Asia. This is very important. Thank you for your help!

2007-11-11 09:32:36 · 5 answers · asked by Alisha N 2 in Botany

What is the acceleration of two falling sky divers (mass 103.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
= ___ (downward)



After popping open the parachute, the divers descend leisurely to the ground at constant speed. What now is the force of air resistance on the sky divers and their parachute?
=___N (upward)

2007-11-11 09:30:17 · 1 answers · asked by Jon R 1 in Physics

what are your thoughts on this subject?

2007-11-11 09:28:59 · 13 answers · asked by kobblepot 1 in Astronomy & Space

this is polya's problem and i have to do it for geometry and it is the freakin hardest thing ever! someone please help me!

2007-11-11 09:25:45 · 5 answers · asked by k8tqwen 1 in Mathematics

Find the solution of the following initial-value problem

2007-11-11 09:25:38 · 3 answers · asked by dimachevelle 2 in Mathematics

2007-11-11 09:25:31 · 3 answers · asked by Sarah <3 1 in Mathematics

17) what is the intensity of the electromagnetic radiation at a distance of 2.00 m from a 100 W isotropic source?


18) A light ray in air strikes a glass surface with an angle of incidence of 30 degrees. The angle of refraction in the glass is 20 degrees. What is the index of refraction of the glass?

please help and explain to me how to do these problems, I am having a hard time and I have a crappy book that doesn't help me at all!!! thanks

2007-11-11 09:23:01 · 1 answers · asked by Anonymous in Physics

Consider the reaction:

H2O(g) + CO(g) = H2(g) + CO2(g)

Which of the following statements are true and which are false.

When Q > K the system will spontaneously shift to the left.


1 mol of H2O(g) and 1 mol of CO(g) are placed in a vessel and 1 mol of H2(g) and 1 mol of CO2(g) are placed in another of equal volume. At equilibrium, at 350°C, the amounts of CO(g) in the two vessels are equilvalent.


At equilibrium, individual molecules may be subject to rapid chemical transformations.


At equilibrium, the overall composition of the reaction mixture is not changing.


Amounts of all reactants and products corresponding to an exact equilibrium composition for this reaction are sealed in a vessel. The CO placed in the vessel is labelled with 14C. After an indefinite period of time 14C may be found in both CO and CO2 molecules.


The equilibrium constant is independent of the initial concentrations.

2007-11-11 09:21:24 · 1 answers · asked by vik s 1 in Chemistry

If the population of Mesa, AZ increased from 152,404 to 288,091 over ten years, by what percent did the population increase in the decade?

And also what was the growth rate for the decade?

2007-11-11 09:21:16 · 4 answers · asked by rst41 2 in Mathematics

2007-11-11 09:21:12 · 5 answers · asked by Anonymous in Medicine

Was wondering what is poisonous to sheep and cattle?

I noticed that when they graze they eat pretty much anything.
So what types of plants would be poisonous to them?

2007-11-11 09:21:11 · 2 answers · asked by raptor4499 1 in Zoology

Mysticalball.com, the site you see on bored.com. How does it work? Thank you!

2007-11-11 09:18:55 · 30 answers · asked by callligenia 2 in Other - Alternative

When current "i" flows through a given electrical circuit, the power "w" of the circuit can be determined by the formula W=120i - 12i^2. What amount of current "i" supplies the maximun power for "W"?

thanks for helping out :)

2007-11-11 09:17:34 · 6 answers · asked by Anonymous in Mathematics

2007-11-11 09:17:12 · 5 answers · asked by . 6 in Astronomy & Space

How do they behave over 11-year cycles? What other features of the solar atmosphere are related to sunspots?

2007-11-11 09:15:08 · 2 answers · asked by maxpowerrys 1 in Astronomy & Space