Science & Mathematics - 10 September 2007

2007-09-10 09:15:47 · 4 answers · asked by Anonymous in Mathematics

Does anyone know an algorithm that I can use to convert decimal numbers to fractions? I am trying to make a program on my calculator, so please keep that in mind when answering, as the calculator can't do many of the things that you and I could.

2007-09-10 09:13:15 · 5 answers · asked by Mnementh 2 in Mathematics

"Algebraically determine the symmetry of the graph of the relation."

How would I go about doing this? (The symmetries are x-axis, y-axis, origin, and line y=x) - please use my first exercise as an example:

y = x^4 - 2x^2

Thanks!

2007-09-10 09:12:45 · 4 answers · asked by Brad 2 in Mathematics

Three forces, A, B, and C, acting together, produce a resultant force of 10 N in the +y direction.

Force A is 10 N in the +y direction.
Force B is 10 N in the -y direction.

What is the magnitude and direction of force C?
Solve by the method of components.

(I don't even know where to begin! Any help would be appreciated!)
Thanks :)

2007-09-10 09:12:15 · 3 answers · asked by Anonymous in Physics

A basketball player, standing near the basket to grab a rebound, jumps 76.0 cm vertically. How much total time does the player spend (a) in the top 15.0 cm of this jump and (b) in the bottom 15.0 cm? Does this help explain why such players seem to hang in the air at the tops of their jumps? Show and explain your work. Thanks and good luck! :)

2007-09-10 09:10:43 · 1 answers · asked by Anonymous in Physics

Calculations Using Scientific Notation
Express your answers in scientific notation.
1. (5.11 x 10^2) - (4.2 x 10^2)
how do you get:
(standard notation)STN = 910
(scientific notation)SCN = 9.1 x 10^2
how do you get this^, im really lost!

2007-09-10 09:07:29 · 1 answers · asked by Anonymous in Chemistry

#1[[fraction...a+1 over 8= a half[1 over 2]

#2[[a-5 over 4= a half[1 over 2]

#3[[3a + 5=5a-3]]

#4[[a over 3-2=10]]

#5[[4a-2+7=17

2007-09-10 09:05:26 · 2 answers · asked by starz_n_smilez 2 in Mathematics

2007-09-10 09:03:18 · 30 answers · asked by cheekymunky 2 in Astronomy & Space

Hence, solve (y+8/y)^2 +3(y+8/y)-54=0

2007-09-10 09:02:13 · 12 answers · asked by Cady 1 in Mathematics

How can I solve this by factoring?

2007-09-10 08:58:42 · 3 answers · asked by vietx69 2 in Mathematics

i know a few seconds is a long time in terms of the universe expanding, but i just want an example and the tiny amount of seconds it took to go from the size of a ......... to the size of a .......... if you get me? i would just like to know so i could go, wow. e.g from a tennis ball to the size of the sun. but a gd fact please
thanks

2007-09-10 08:58:26 · 5 answers · asked by gavlaar 2 in Astronomy & Space

rite what im trting to find out is... as chlorine is in the 7th group in the periodic table it has 7 electrons in its outer shell which means to gain a full outer shell it needs one more electron so does this mean in electrolysis chlorine wouls be attracted to the cathode to gain its extra electron....or have i got that totaly wrong?

2007-09-10 08:57:36 · 1 answers · asked by jono 2 in Chemistry

What is 3/5 + 3/5=???

2007-09-10 08:45:06 · 6 answers · asked by Anonymous in Mathematics

r+6/5 = r+8/7

2007-09-10 08:44:33 · 4 answers · asked by . 1 in Mathematics

2007-09-10 08:44:32 · 3 answers · asked by sam h 1 in Chemistry

how does 1 siberian tiger cover

2007-09-10 08:41:04 · 8 answers · asked by dana e 2 in Zoology

in a triangle(all the angles are smaller than 90 degrees).
AB=a
BC=b
AC=c
S=the area
S/a*c=2/5
S/a*b=3/8
find the angles of the triangle

2007-09-10 08:40:43 · 3 answers · asked by Anonymous in Mathematics

2007-09-10 08:38:47 · 2 answers · asked by m g 1 in Chemistry

why does`nt the earths gravity, pull the moon down on to it?

2007-09-10 08:36:09 · 16 answers · asked by Anonymous in Astronomy & Space

Find the equation of a line through (-4, -8) and (2, 7)?

2007-09-10 08:35:50 · 7 answers · asked by sweet_candy 2 in Mathematics

2007-09-10 08:32:43 · 4 answers · asked by Me<3JB 2 in Chemistry

OMG I can't spell unnessasary

2007-09-10 08:30:38 · 22 answers · asked by virtualparticle22 2 in Astronomy & Space

Three consecutive integers have the sum of 153.
What is the first integer?

Five times the first of three consecutive even integers is fourteen more than three times the second.
What is the third integer?

Thanks!

2007-09-10 08:29:24 · 8 answers · asked by Anonymous in Mathematics

Of-course, i know its impossible, but my friend has just asked me how long it would take for a human to swim to the bottom of the deepest part of the sea. Would it take hours/days?

2007-09-10 08:27:46 · 3 answers · asked by Catherine1 4 in Earth Sciences & Geology

If anyone could help with any/all of the following questions it would be greatly appreciated. I am so confused..

**arc_ = the inverse if you didn't know**

1. arctan(2x-3)=pi/4
2. arcsin(3x-pi)=1/2
3. arctan(2x)= -1
4. arcsin(the square root of 2x)=arccos(the square root ofx)

5. find tan [arcsec(root 5)/2]
6. find sin (arc sec(x))
7. find csc [arctan(x/root2)]

also if anyone knows the domain and range of csc(x), sec(x), and cot(x) that would be helpful too.

Thanks!

2007-09-10 08:25:09 · 4 answers · asked by dunkn_donut 1 in Mathematics

2007-09-10 08:23:37 · 4 answers · asked by jason g 2 in Other - Science

we know that there is a valence band, forbidden band and a conduction band of electrons for an atom. For conduction to take place electrons in the valence band need to gain energy and jump to the conduction band.

but say for pure silicon can an electron exist in the forbidden band?
how about for doped silicon?

2007-09-10 08:22:04 · 1 answers · asked by sh 1 in Physics

Outside of school, where are matrices used?

2007-09-10 08:18:21 · 5 answers · asked by ryan49321 3 in Mathematics

1. __________are made with the senses and instruments
2. the conclusion is the____________.
3.the experiment should be _______________ many times to check the conclusions.
4. when many scientists reach the same conclusion, the conclusion may be called a ____________.

please help me with this........ i have no idea what i'm supposed to fill in the blanks with >.<

2007-09-10 08:18:18 · 5 answers · asked by Max 1 in Biology

I personally believe that thought is the most mysterious thing there is

2007-09-10 08:16:59 · 25 answers · asked by virtualparticle22 2 in Astronomy & Space