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Science & Mathematics - 4 September 2006

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I want do logistic regression analysis of my data but all my independent variables are categorical.

2006-09-04 08:54:17 · 1 answers · asked by Anonymous in Mathematics

Say you have a fitted but freely moving piston falling in a large cylinder. The piston weighs 100kg but only weighs 1 kg under water. The cylinder is filled with water, but there is plumbing going from the bottom of the cylinder to the top. The plumbing is also filled with water. As the piston moves down in the cylinder the water is free to move from beneath it, through the plumbing, and back to the top of the cylinder in a continuous loop.Lets assume the plumbing is of the appropriate shape and design to allow the water to travel as freely as possible. What would the velocity of the piston be after a 20m freefall?

2006-09-04 08:52:56 · 7 answers · asked by man sheath 2 in Physics

2006-09-04 08:52:20 · 21 answers · asked by Anonymous in Earth Sciences & Geology

It's a science word, and it's definition is: A unit of work equal to one newton-meter.

2006-09-04 08:49:34 · 4 answers · asked by KP 3 in Other - Science

2006-09-04 08:49:28 · 5 answers · asked by janegirl921 1 in Mathematics

2006-09-04 08:47:19 · 34 answers · asked by bitter sweet 2 in Astronomy & Space

2006-09-04 08:46:25 · 28 answers · asked by Alicat 6 in Zoology

There are 1000 student and 1000 lockers.
The first student opens each of the 1000 lockers.
Second student closes every second locker.
Third student opens every third locker if it is closed or if it is open he closes it.
The fourth student goes to every fourth locker and if it is open he closes it, if it closed he opens it.
This process continues until it is completed by the 1000 students.

2006-09-04 08:46:24 · 5 answers · asked by Jeffrey Z 1 in Mathematics

One of the questions I have to answer is: "Characterize the following compounds as soluble or insoluble in water: (a) CaCO3, (b) ZnSO4, (c) Hg(NO3)2, (d) HgSO4, (e) NH4ClO4"

What I don't understand is how to recognize soluble and insoluble compounds. Please help!

2006-09-04 08:44:15 · 13 answers · asked by Anonymous in Chemistry

Like the photon is to light, is there a basic "magneton" particle that makes up magnetic fields?

2006-09-04 08:42:36 · 3 answers · asked by juicy_wishun 6 in Physics

2006-09-04 08:41:29 · 10 answers · asked by Anonymous in Astronomy & Space

its 4 tommorow!!! HURRY UP!!!

2006-09-04 08:33:05 · 3 answers · asked by volleyballMVP 2 in Earth Sciences & Geology

the recovery of CaCO3 was attempted by adding 3M H2SO4 instead of 3M HCl to the SiO2 / CaCO3 residue

2006-09-04 08:28:10 · 1 answers · asked by Anonymous in Chemistry

2006-09-04 08:28:09 · 23 answers · asked by Anonymous in Astronomy & Space

What is the fastest R.P.M. possible for an object such as a gyro?
Can the speed of electricty be achieved?
I have designed a flywheel type device that could achieve very high speeds. I am wondering if anyone has experimented with super R.P.M.'s or Rounds Per Second as I would see it?
I am thinking that at a certain speed things unknown to us so far would happen. Thanks for your thoughts on this matter.

2006-09-04 08:25:36 · 4 answers · asked by Dutch V 2 in Physics

What is the probability of existance of a 3rd pole for the magnite ?
Because there is +Ve And -Ve , why cant we have another Pole

P.S: Nuteral Pole is never considerend as a pole :D

2006-09-04 08:23:46 · 5 answers · asked by Anonymous in Physics

2006-09-04 08:17:35 · 13 answers · asked by Anonymous in Mathematics

do we need nitrogen to survive just like we need oxygen?

2006-09-04 08:16:33 · 9 answers · asked by pearly_cherry 4 in Chemistry

Don't tell me to cut myself open, because that wouldn't really tell me anyway

2006-09-04 08:15:32 · 10 answers · asked by Anonymous in Biology

2006-09-04 08:07:57 · 3 answers · asked by ND 1 in Mathematics

Why is foaming soap more efficient at cleaning us -- more clean, less time, less water, less soap -- than the exact same soap as a liquid? I'm talking about foaming soap dispensers like the one at
http://www.kissmyface.com/Product/Kiss+My+Face/Self+Foaming+Soaps/4008751EA/

2006-09-04 08:04:16 · 7 answers · asked by Floating Bones 1 in Physics

I'm wondering who named the planets and where they got the names from. Especially Uranus! I dont care about the new planets they've found just the classical ones.

2006-09-04 08:04:14 · 13 answers · asked by ho_ho_ho_merry_thursday 2 in Astronomy & Space

x-2y=4
2x-3y=5

2006-09-04 08:03:28 · 3 answers · asked by mixed 1 in Mathematics

2006-09-04 08:01:32 · 6 answers · asked by christine2550@sbcglobal.net 2 in Earth Sciences & Geology

Seriously, if you think you can, please take a crack at it. Funny and completely non serious answers are more than welcome.

2006-09-04 07:51:11 · 12 answers · asked by Brento! 4 in Mathematics

In chemistry we are doing a candle lab. one of the questions for the lab report is:

Determine how long it would take for your entrie candle to be extinguished.

the data im using is the height of the candle. before it started to burn it was 6.5cm tall. after EIGHT minutes of burning it was 2cm.

so; how long would it take for it to be completly extinguished? thanks!

2006-09-04 07:50:04 · 2 answers · asked by Anonymous in Chemistry

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