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Science & Mathematics - 15 September 2007

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Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

Integrate 1/(cos2x - 1)

Thanks in advance =)

2007-09-15 03:29:06 · 2 answers · asked by Anonymous in Mathematics

Auxiliary power supply: a) Explain the different options for auxiliary power supply of a
normal gas turbine power station sketching the corresponding single line diagrams. b) Which
conditions determine in the design phase (on the supply side), which option is chosen?
c) When and how is the auxiliary power supply switched over to another source? Three
typical examples are enough.

2007-09-15 03:27:56 · 2 answers · asked by meesogynist 1 in Engineering

I've completely forgotten how to do this!

2007-09-15 03:18:23 · 4 answers · asked by Anonymous in Mathematics

New Horizons is due to reach pluto in 2015 but right now where is it(what planet is it near to)?

2007-09-15 03:15:36 · 4 answers · asked by Dried_Squid 2 in Astronomy & Space

The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 46 in., find the width of the rectangle.

2007-09-15 03:06:36 · 10 answers · asked by PJH 2 in Mathematics

2007-09-15 03:03:52 · 4 answers · asked by Yvonne Hussain 1 in Zoology

News stories say the world's official kilogram is loosing mass -- or is it the other test mass that are gaining weight? What do you think should be the definition of the kilogram, and how would you make one in your multi-million dollar lab?

2007-09-15 03:03:33 · 4 answers · asked by morningfoxnorth 6 in Physics

Silver iodide powder has been used as an antiseptic and as an agent to seed clouds for rain. Silver oxidide is 45.9% silver by mass. If u seperate a 50-g sample of silver iodide into its element,silver and iodine, how much silver would u have?

2007-09-15 03:01:10 · 4 answers · asked by Anonymous in Chemistry

it takes A 2 hours less time than pump B to empty a certain swimming pool. pump A is started at 8:00. A.M, and pump B is started at 11:00 A.M. If the pool is still half full at 5:00 P.M., then how long would it take pump A working alone ?

2007-09-15 02:59:05 · 5 answers · asked by husham_satti 1 in Mathematics

2007-09-15 02:54:44 · 7 answers · asked by Anonymous in Zoology

"Vacancies for freshers in australia in mechanical engineering in jobs?"?

2007-09-15 02:44:31 · 1 answers · asked by kanwal a 1 in Engineering

Adult tickets for a play cost $20 and child tickets cost $5. If there were 22 people at a performance and the theater collected $335 from ticket sales, how many children attended the play?

2007-09-15 02:42:50 · 2 answers · asked by PJH 2 in Mathematics

I do just because there is so much evidents.

2007-09-15 02:32:49 · 9 answers · asked by Anonymous in Biology

please explain.

2007-09-15 02:23:31 · 8 answers · asked by Anonymous in Physics

I just checked. Nope. All clear.

2007-09-15 02:22:58 · 3 answers · asked by Anonymous in Zoology

2007-09-15 02:04:08 · 15 answers · asked by B VAMSI KRISHNA 1 in Astronomy & Space

2007-09-15 01:47:16 · 11 answers · asked by Anonymous in Mathematics

2007-09-15 01:39:53 · 5 answers · asked by tony d 1 in Engineering

2007-09-15 01:38:32 · 4 answers · asked by tony d 1 in Engineering

Does it differ from person to person? . Is it possible to record such information from memory to a CD or Harddisk?

2007-09-15 01:37:40 · 9 answers · asked by jeet 1 in Other - Science

2007-09-15 01:21:27 · 5 answers · asked by tony d 1 in Engineering

please enumerate changes

2007-09-15 01:10:32 · 3 answers · asked by jin11_knight 1 in Physics

In todays world, can you imagine if we don't have computers?

2007-09-15 01:09:28 · 5 answers · asked by exo 7 in Earth Sciences & Geology

2007-09-15 01:02:42 · 1 answers · asked by Anonymous in Chemistry

The ocean is a deep body of water,why can't it somehow be filtered of salt and other trashy stuff and pipe it to areas that need relief? Has anyone ever thought of this?
As much money that's wasted on a useless war and other things,why not put that money to better use to save our land and our people?
Just a passing thought!!
What do you think?

2007-09-15 00:44:10 · 7 answers · asked by Sewnmemaw60 4 in Earth Sciences & Geology

2007-09-15 00:34:41 · 6 answers · asked by hello 2 in Weather

2007-09-15 00:33:13 · 12 answers · asked by Anonymous in Astronomy & Space

2007-09-15 00:11:39 · 8 answers · asked by kastro 1 in Mathematics

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