Science & Mathematics - 17 February 2007

2007-02-17 01:48:22 · 8 answers · asked by babyD 1 in Weather

The phone digit 1 is a combination of 2 frequencies.
1209hz + 697hz

Now, if you had 2 seperate speaker that played each frequency, would you hear the combination of the 2 frequencies, or would you be able to make a distinction?

I gues the answer would depend on the speakers placement proportional to your ears.
If they were at the exact same distance, it would appear as the combination. If there was any deviance to the placement of the speakers, then you would be able to differentiate the signals.

I believe that to be true. I just wish I had the equipment.

2007-02-17 01:46:09 · 1 answers · asked by Anonymous in Engineering

I have searched the whole web for help. I am studying ionic compounds. Any help is appreciated.

2007-02-17 01:44:22 · 2 answers · asked by Toothie 2 in Chemistry

2007-02-17 01:43:18 · 3 answers · asked by Anonymous in Physics

2007-02-17 01:42:48 · 6 answers · asked by the champ 2 in Astronomy & Space

I was doing matter in my physics course and i was working on derviving a formula for potential energy of atoms when forced out of equilibrium, but from the initial form of 0= e [ K^16 - 2*K^6 ]
When derviving you get the form K^16 = 2*K^6
(when K is equilibrium seperation over displacement, but their both the same figures, i think )
But yeah, i can see how you get there but that doesn't make sense mathematically and surely isnt true, so how can the final form be true if that isn't?
( r = r' / 2^1/6 )

2007-02-17 01:41:54 · 2 answers · asked by Anonymous in Physics

2- Max Z = 5x1 + 3x2
Subject to: 6x1 + 2x2 <= 18
15x1 + 20x2 <= 60
x1 , x2 >= 0
Find the optimal profit. Z=?
============================================



3. Consider the following linear programming problem.
MIN Z = 10x1 + 20x2
Subject to: x1 + x2 >= 12
2x1 + 5x2 >= 40
x1, x2 >= 0
What is minimum cost Z=??

2007-02-17 01:40:34 · 3 answers · asked by Anonymous in Mathematics

who knows the active components/constituents found in leaves, bark, flower, roots, and seeds of Vitex negundo or Five-leafed chaste tree (lagundi)

2007-02-17 01:37:21 · 3 answers · asked by Laine 1 in Botany

...year olds when running? serious answers only please.

2007-02-17 01:36:28 · 7 answers · asked by ? 3 in Biology

Has anyone ever figured out, exactly, what quasars are? Are they just galaxies with highly energetic radio jets in their cores, or are they something entirely different? Also, where can I find a book on active galactic nuclei that's written for lay persons, not astrophysics majors?

2007-02-17 01:34:16 · 5 answers · asked by Anonymous in Astronomy & Space

2007-02-17 01:33:48 · 6 answers · asked by kiran C 1 in Engineering

Esther drove to work at an average speed of 45 miles/hr. She drove back home at an average speed of 30 miles/hr. The total time she drove was one hour. How many miles did Esther drive in the morning?

2007-02-17 01:28:50 · 3 answers · asked by x overmyhead 2 in Mathematics

2007-02-17 01:26:04 · 5 answers · asked by Starmu 1 in Physics

2007-02-17 01:25:54 · 3 answers · asked by ana_isabelly 2 in Earth Sciences & Geology

5m divided by m+1
plus
1+4m divided by m+1
=
m-1 over m+1
.................................................
a+b divided by 2
plus
a-b divided by 2
=
b
....................................................
x squared divided by x+5
minus
5x divided by x+5
=
x
......................................................

Can someone please show me how you get to these answers? I know how to do this, but for some reason I'm doing something wrong because I CANNOT get to these answers!!

2007-02-17 01:23:44 · 8 answers · asked by Anonymous in Mathematics

2007-02-17 01:22:18 · 3 answers · asked by troy durr 1 in Other - Science

Consider the reaction:

2 NaHCO 3(s) <==> Na 2CO 3(s) + CO 2(g) + H 2O(g)

Match the following four changes to the reaction with their effect on the equilibrium.

____Mg(ClO 4) 2(s) is added as a drying agent to remove H 2O.

____NaHCO 3(s) is added.

____Dry ice (solid CO 2) is added.

____0.20 atm of argon gas is added.

1.
The reaction shifts towards the reactants.
2.
The reaction shifts towards the products.
3.
The change has no effect on the equilibrium.

2007-02-17 01:21:04 · 5 answers · asked by Cupcake 2 in Chemistry

2007-02-17 01:15:50 · 7 answers · asked by Brainwave 1 in Engineering

i think his name is skunk or somethin but im not sure can you give me name and his picture please!
thanks!!!

2007-02-17 01:14:36 · 2 answers · asked by Anonymous in Zoology

2007-02-17 01:14:16 · 25 answers · asked by kevin 2 in Earth Sciences & Geology

My Q. is why we write under O 4 ; but as I know the valence of O is just 2 and also why we write under Fe 3 and the valence of Fe is 2 &3??

2007-02-17 01:11:31 · 4 answers · asked by gold_sunlight.2007 1 in Chemistry

What is actually zero number?

Why it can't be divided by every number?

e.g.:

6 / 0 is undetermined.
Why? because 0*0 is not 6. So, what can be done to make that 0 become 6? Why is 0 so misterious?

2007-02-17 01:10:49 · 11 answers · asked by Chreonne 2 in Mathematics

2007-02-17 01:08:51 · 5 answers · asked by patel b 1 in Engineering

It's very urgent as my exams r approaching so plz help me by giving answers with everything covering in it.Plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help me.

2007-02-17 01:08:33 · 3 answers · asked by Kittu s 2 in Geography

2007-02-17 01:06:52 · 9 answers · asked by Anonymous in Chemistry

please i need good answers

2007-02-17 01:06:51 · 1 answers · asked by Richard C 1 in Botany

1 over 3 of 300 + 5

i do not no how to do fractions very well , all i know is halfs and quarters (thats bad i know)


and can u plz tell me how you worked it out

2007-02-17 01:05:46 · 10 answers · asked by 100% me 2 in Mathematics

i know it has albumin and egg yolk.. but i want to know the detail of contents & % of it.Thanks.

2007-02-17 01:05:39 · 8 answers · asked by Anonymous in Chemistry

2007-02-17 00:56:24 · 2 answers · asked by boshkash 1 in Engineering

2007-02-17 00:46:25 · 10 answers · asked by cool girl 1 in Mathematics