Science & Mathematics - 12 February 2007

What determines the amount of energy in a shell? Will K energy level < L shell? Is this because of placement with respect to the nucleus? Please explain.

2007-02-12 22:25:50 · 2 answers · asked by Anonymous in Chemistry

hello i came across this sentence and i want to know exactly what it means pleas some body put the light on it
Thanks

2007-02-12 22:24:46 · 2 answers · asked by jay_1162002 1 in Biology

By what factors must you multiply the volume of a gas measured at 20 'C and 750mm Hg in order to find what the volume would be at s.t.p ( standard temperature and pressure)??

2007-02-12 22:24:17 · 2 answers · asked by iqnabeel 1 in Chemistry

if u say yes plz specify the reason/s if no also reason/s..........thank uuuu

2007-02-12 22:20:58 · 13 answers · asked by neeraj_chopda2004 1 in Astronomy & Space

2007-02-12 22:19:53 · 16 answers · asked by Praneet M 1 in Astronomy & Space

2007-02-12 22:18:58 · 9 answers · asked by pcasthana2003 1 in Astronomy & Space

2007-02-12 22:18:50 · 10 answers · asked by saravana4787 1 in Weather

Is pebble an igneous rock, sedimentary rock or metamorphic rock?

2007-02-12 22:18:14 · 2 answers · asked by Joanna Bugayong 1 in Earth Sciences & Geology

Given the age and size of the universe, shouldnt we have been visited by LARGE numbers of extra-terrestrials by now?

2007-02-12 22:17:30 · 11 answers · asked by afrprince77 2 in Astronomy & Space

i have a project in math and i can't think of anything to invent.
I'm looking for an invention that is not too exoensive to invent.
I really need help.
Math is a very very major subject to us.

2007-02-12 22:17:16 · 1 answers · asked by Karla 2 in Mathematics

Humans have discovered the existence of atoms. It somehow replicates the formation of the solar system. Maybe the solar system replicates the galaxy and the galaxy replicates something else... futher more, the galaxy may be a part of something big.

2007-02-12 22:16:36 · 12 answers · asked by sherwin 2 in Astronomy & Space

V=1/3 X pi X r^2 X h

What is maximum volume of a cone with SLOPE HEIGHT 3m????

2007-02-12 22:16:19 · 5 answers · asked by Perfect-Angel84 2 in Mathematics

the 2004 indian tsunami affected a lot of people. what can be done to prevent tsunamis?

2007-02-12 22:15:14 · 1 answers · asked by Anonymous in Weather

Compare f(x) = a^x and f(x) = log[base a]x in terms of:

1. Intercepts (x and/or y)
2. Symmetry (to each other)
3. The concept of inverse (including f of f^-1(x))

Any help would be appreciated.

2007-02-12 22:15:06 · 2 answers · asked by F 2 in Mathematics

science

2007-02-12 22:13:36 · 20 answers · asked by saravana4787 1 in Weather

9(-7) - 6(-7)^2 + 4(2)^2 is:
-63 - 294 + 16.

If I start from largest to smallest to solve this I would do 294 + 16 =310. So then I'm left with -63 - 310. But if you have a negative number minus a positive number you subtract right? so (neg - pos = subtract) -63-310= -373. Which turned out to be wrong. The right way would of been -62 - 294 + 16 = -341.

If the following charts I have are true, what am I doing wrong?

Adding intergers

Negative + Negative = (add)
Positive + Positive = (add)
Negative - Negative = Add (add as written)
Positive - Positive = (Subtract)
Negative + Positive = (add)
Positive + Negative = (subtract)
Negative - Positive = (Subtract)
Positive - Negative = (add)

Positive squared = positive
Positive cubed = positive

Integers & powers
Negative squared = positive
Negative cubed = negative
Positive multiplied by positive = positive
Negative multiplied by negative = positive
Negative multiplied by positive = negative
Positive multiplied by negative = negativ

2007-02-12 22:10:37 · 6 answers · asked by Konjo Nashi Pirate™ 5 in Mathematics

2007-02-12 22:10:21 · 11 answers · asked by saravana4787 1 in Geography

is given by s=2t+3t^2-t^3
a)differentiate so to find velocity and aceleration
b)what is speed at t=0.5 seconds
c)find all stationary points in displacement function
d)when does velocity reach maximum and what is maximum

Please explain all working if poss - not just answers

2007-02-12 22:06:37 · 5 answers · asked by Perfect-Angel84 2 in Mathematics

I can figure how they get the water to run downhill, but how do they get it to go up?

2007-02-12 22:06:02 · 6 answers · asked by brown one 2 in Geography

2007-02-12 22:05:47 · 1 answers · asked by Anonymous in Geography

define what is fire

2007-02-12 22:03:21 · 2 answers · asked by thomazzz 1 in Chemistry

a) x^5+2x^3+x^-1-1
b)sin(ax)+e^-bx
c)(1-x)^3
d)2x^2sin(2x)

2007-02-12 22:02:30 · 3 answers · asked by Perfect-Angel84 2 in Mathematics

As far as my general knowledge is concerned, there are (maybe were) supposed to be two different explanations of the property of the universe. One is, it was generated from a point and now continuously expanding; and the other is, it's continuously contracting and will become a point. Whatever it is, but where the hell is the universe expanding or contracting? What's that space? How big that space is? What's that contained in? I am absolutely confused.

2007-02-12 21:55:18 · 8 answers · asked by Cligztraizt 1 in Astronomy & Space

I need to make a container for science class and it needs to hold in as much heat as possible if I put in hot water. But I can't use a Thermos and the device has to fit on top of my desk. Also, I need to be able to open the device and put in the hot water. This device can not contain a heater or hot material of any kind except for the container of hot water. I'd like to keep the materials easy to find and cheap. Thanks!

2007-02-12 21:54:44 · 5 answers · asked by Hyunmin 1 in Engineering

i have tried many graphs but i cant find anyhting in books and i need to hand it in soon.

2007-02-12 21:53:31 · 3 answers · asked by heather j 1 in Mathematics

In the film, the day after tomorrow the climatologist goes on about the flow of the ocean, the way it travels in a cycle heating up and cooling down, & that the cycle is shutting down causing all the effects that the film illusteates.... What's the name of this cycle please anyone ????

2007-02-12 21:51:56 · 7 answers · asked by PEO 1 in Earth Sciences & Geology

i want some technique to remember all the shortcut for solving aptitude

2007-02-12 21:51:46 · 3 answers · asked by Anonymous in Engineering

i have tried many graphs but i cant find anyhting in books and i need to hand it in soon.

2007-02-12 21:46:29 · 1 answers · asked by heather j 1 in Mathematics

2007-02-12 21:45:44 · 8 answers · asked by something 1 in Biology

Adding intergers:

Negative + Negative = (add)
Positive + Positive = (add)

Negative - Negative = (add)
Positive - Positive = (subtract)

Negative + Positive = (add)
Positive + Negative = (subtract)

Negative - Positive = (Subtract)
Positive - Negative = (add)

Is this correct?

2007-02-12 21:34:50 · 3 answers · asked by Konjo Nashi Pirate™ 5 in Mathematics