Science & Mathematics - 29 December 2007

Find all extrema in the interval [0,2π] if y= x + sin x

2007-12-29 06:50:25 · 1 answers · asked by Anonymous in Mathematics

what is it exactly?and has there been records of it happening?

2007-12-29 06:49:35 · 16 answers · asked by Anonymous in Physics

Could anyone please balance this equation:
Mg+_HNO3 = Mg(NO3)2+_H20+2NO2
It would be nice if you could include an explanation too.

2007-12-29 06:48:38 · 7 answers · asked by Anonymous in Chemistry

2007-12-29 06:47:19 · 10 answers · asked by Dawne 2 in Biology

What is it about California wildfires that makes them so fast-moving and destructive?

2007-12-29 06:46:29 · 5 answers · asked by Willster 5 in Geography

can u describe a parrotfish's mouth plz.( like its teeth, jaws and stuff) also is there any fish that digs holes or live in the sand (no jawfish)

2007-12-29 06:43:55 · 2 answers · asked by yehhidam 1 in Zoology

Find the limit: lim x->∞ 2x^4+6x^2+5/3+x^3

2007-12-29 06:43:39 · 6 answers · asked by Anonymous in Mathematics

2007-12-29 06:41:11 · 7 answers · asked by ppd232 1 in Mathematics

What Makes Up An Atom?
What Makes Up The Thing That Makes Up An Atom?
What The The Thing That Makes Up The Thing That Makes Up An Atom?

Etc Etc

How Far Can You Guys Go?
I Would Love To Know.

2007-12-29 06:40:40 · 7 answers · asked by gdc3.rocks 3 in Physics

name the following molecules
CI2 (that is an i, not an L)
BH3

also, how much energy is needed to break apart a molecule of acetone?
please show your work so i can figure out the rest of these problems.

thank you!

2007-12-29 06:39:04 · 1 answers · asked by Anonymous in Chemistry

Is it a complete theory yet? Or just a conceptual idea of uniting all the branches of string theory with supergravity ect..
Does M- theory claim that the universe started as a collision of 2 d- branes? If so, where did the branes come from in the first place? What gave them movement?

2007-12-29 06:38:05 · 4 answers · asked by Anonymous in Physics

did you yawn right now? lol ^_^

Please star if you like this question! :c)

2007-12-29 06:36:22 · 5 answers · asked by cheer4lyfe! 1 in Biology

2007-12-29 06:36:05 · 3 answers · asked by mustafa e 1 in Physics

We have all just wrapped up and gone outside to stargaze (something we often do as our 6 year old is fascinated) there is a very very bright star in the sky, brighter than the North star - Is it Venus? Someone said it could be?

2007-12-29 06:35:32 · 10 answers · asked by Anonymous in Astronomy & Space

how it will change the world as we know it? if it became available for the public.

2007-12-29 06:33:53 · 8 answers · asked by H.H.Holmes 2 in Biology

Button mushrooms in particular. Do they take in oxygen?

2007-12-29 06:31:40 · 1 answers · asked by Nicole M 1 in Biology

2007-12-29 06:30:55 · 6 answers · asked by Bluebeard 1 in Chemistry

has anyone ever heard the difference between an amplifier and an oscillator? would this make a sustainable power supply? sort of like using the motion of current instead of actual current? the current loop or like a whirlpool effect?
is it not sort of seen in solar cells, this one at an RPM level?

1. 20 amp - several batteries & switchable reserves
2. 750 watt - several power inverters for ? Kilo Watts

parallel for more amps at voltage
3. 5 amp vacuum motor - ac rpm torque motor
4. 5 amp - feedback deep cycle battery charger
5. 5 amp int 50 amp out - alternator with rectifier & regulator

6. solar cell pack for recharging too possibly.

a no oil - no pollution - power supply
the ac motor driving an alternator?

2007-12-29 06:30:36 · 3 answers · asked by stevenos_2005 2 in Engineering

2007-12-29 06:27:57 · 7 answers · asked by Anonymous in Physics

I think you can and here is my reason.

I have found in a certain state lottery that when the winning numbers are posted they fall within a certain range of number within their specific columns.

For example;

I have set up my Excel program to display 6 columns from 1 to 50 numbers.

When I plug in the winning numbers into these columns, each winning number for each column falls within a narrow range of numbers; such as;

column 1, winning number = 4
column 2, winning number = 10
column 2, winning number = 20
column 3, winning number = 30
column 4, winning number = 42
column 5, winning number = 49
Column 6, Red Ball, Totally all over the place.

When I graph these numbers and highlight them, they all fall within a small narrow range of the total amount of numbers available within each column, ususally 99% of the times and within 5 to 10 numbers.

Am I on to something here are am I totally nuts?
Please, only serious answers need to answer.

2007-12-29 06:26:54 · 2 answers · asked by Anonymous in Other - Science

2007-12-29 06:25:43 · 17 answers · asked by Anonymous in Astronomy & Space

1. A double covalent bond consists of
a. two shared electrons
b. one atom contributing two electrons into the bonding region
c. two atoms of the same element bonded together
d. two pairs of shared electrons

2. Water molecules have a bent shape rather than a linear shape because
a. water does not obey VSEPR theory
the hydrogen atoms are attracted to one another
c. lone pairs of electrons around the oxygen atom exert a repulsive force on the bonding electron pairs
d. oxygen does not have enough valence electrons to form linear molecules

3. The polarity of a molecule is a direct result of all of the following EXCEPT
a. the electronegativity of the atoms in the molecule
b. the number of multiple bonds in the molecule
c. the presence of polar bonds
d. the shape of the molecule

please help if you can!

2007-12-29 06:22:15 · 2 answers · asked by Anonymous in Chemistry

You know the really well preserved one that they found in a glazier. Will all of the new stem cell technology, I know they can do it, I just don't know if they did it.

2007-12-29 06:20:47 · 19 answers · asked by carpe-diem 3 in Biology

2007-12-29 06:20:01 · 6 answers · asked by kailking 1 in Physics

9x² + y² = 9
3x - y = 3

2007-12-29 06:17:37 · 5 answers · asked by kayy♥ 3 in Mathematics

2007-12-29 06:15:00 · 3 answers · asked by SF134 1 in Mathematics

2007-12-29 06:11:25 · 4 answers · asked by quintince 1 in Earth Sciences & Geology

2007-12-29 06:07:11 · 3 answers · asked by metman208 2 in Mathematics

2007-12-29 06:02:32 · 8 answers · asked by hilndave@sbcglobal.net 2 in Zoology

1 The number of bacteria in a culture at time t is given approximately by y=1000(25 + t e^(t/20)) for 0<=t <=100.
(a) Find the largest number and the smallest number of bacteria in the culture during the interval.
(b) At what time during the interval is the rate of change in the number of bacteria minimum?

2007-12-29 06:00:49 · 2 answers · asked by leonardo 1 in Mathematics