Science & Mathematics - 24 October 2007

A 5.32 kg ball hits the floor and bounces back up. Just before it hits the floor its velocity is v=9.97 m/s in the vertical direction.
What is the maximum height the ball can rebound to?

2007-10-24 08:25:32 · 1 answers · asked by Anonymous in Physics

2007-10-24 08:19:21 · 9 answers · asked by james c 1 in Mathematics

6 × 42 + 6 - (5 + 10)

How would I get the answer?

2007-10-24 08:19:14 · 18 answers · asked by Anonymous in Mathematics

Thank you in advance :]

2007-10-24 08:17:58 · 3 answers · asked by virtue.. 2 in Botany

I just did a lab on the heating of magnesium which result in magnesium oxide.Well the question is:

If some of the magnesium oxide had escaped from the crusible, would you percentage composition calculation for magnesium be too high or low. Explain.

I know the magnesium percentage will be greater. Right?
But why?
Im having difficultly tring to explain.

2007-10-24 08:17:47 · 2 answers · asked by Anonymous in Chemistry

i need this pronto its for school

2007-10-24 08:17:46 · 7 answers · asked by Anonymous in Botany

Equations of Transformation.
x = εηcos Φ, y = εηsin Φ, z = 1/2(η^2 - ε^2).

How do I find the Scale factors h(subscript ε), h(subscript η), h(subscript Φ)?

You can use E's n's, or o's for the Greek symbols..

2007-10-24 08:14:19 · 0 answers · asked by WhoaNonstop 2 in Mathematics

my mam thinks she has chopped a frogs leg off by accident when she was moving some heavy plant pots and my step-dads sure that they grow back...help me!

2007-10-24 08:11:24 · 10 answers · asked by Hannah 2 in Zoology

2007-10-24 08:11:14 · 1 answers · asked by Anonymous in Chemistry

2007-10-24 08:08:31 · 8 answers · asked by Anonymous in Geography

Classify the given numbers as real and rational, real and irrational, or complex.
1. (4)1/2 + 2

Simplify the following algebraic expressions
2. (u^8z^7)/ z^-3u^-2
3. (6a^2/7b^3)^-2

2007-10-24 08:08:16 · 3 answers · asked by Snoopy Baby 1 in Mathematics

Let β = ∫ ln ( x + α) dx. Find dβ/dα. The integral runs from sin α on the top to cos α on the bottom.

You can use B's and a's in the explaination, I don't care about the Greek stuff :P

2007-10-24 08:07:58 · 2 answers · asked by WhoaNonstop 2 in Mathematics

2007-10-24 08:02:40 · 5 answers · asked by smileyD 1 in Mathematics

2007-10-24 08:01:44 · 4 answers · asked by Anonymous in Mathematics

They are so alike

2007-10-24 08:01:40 · 12 answers · asked by Anonymous in Geography

If I was charge $84.99 per month on a phone bill that included 1000 min of calling time. Minutes over that was $0.25 per minute. For month the person used 1142 min. What was the charge?

2007-10-24 08:01:28 · 16 answers · asked by Anonymous in Mathematics

when i ask something about science or math, only a handful of people answering the question.

so i think maybe it is true, science and math is hard.

well, to think that i know a little about science too, eventhough im from a third world country, maybe i have a chance to get nobel prize too, didnt i?

2007-10-24 08:00:17 · 6 answers · asked by xc 3 in Astronomy & Space

And I'm not talking about the stars & planets etc. Are they talking about the angels...spirits...saints...or what? "Send it out into the 'universe'"...for what? Stars etc. can't answer. I'm serious. "At one with the 'universe'"...what does it mean? Thanks..sorry...do they make a book about "Paranormal for Dummies"? I need it.

2007-10-24 07:58:46 · 9 answers · asked by Deenie 6 in Paranormal Phenomena

1 formula mass
2 binary compound
3 ternary compound
4 chemical formula
5 ide
6 ite
7 ate
8 mono-
9 di-
10 tri-

A. indicating three atoms
B. single nonmetal atom suffix
C. made of three elements
D. NaSO4’s suffix
E. indicating two atoms
F. water’s is H2O
G. NaNO2’s suffix
H. water’s is 18
I. indicating one atom
J. made of two elements


i think -- 2: j 3:c 10:a

2007-10-24 07:57:14 · 4 answers · asked by tia 3 in Chemistry

?

2007-10-24 07:53:55 · 3 answers · asked by gracieylou43 2 in Chemistry

2007-10-24 07:53:42 · 6 answers · asked by Taylor 1 in Astronomy & Space

suppose the sun does not turn into a red giant and fry us all, but instead, just disappeared. Also imagine that we know this it going to happen in about 20 years.

mankind would not go down without a fight, and so the means to create artificial light would be needed, and people would need to be protected from the cold.

nuclear power has already been achieved, and so that is one of the energy sources we can keep when the sun is gone. however people can no longer create solar power, and the atmosphere has either turned into a freezing cloud, or vanished.

we would have to live underground, plus the earths core, will provide and endless amount of heat due to the earths pressure.

plants and life stock can be brought with us deep under ground, kept alive by artificial sunlight (or UV rays).

my question is, would mankind survive if given the chance to prepare, and live in a rock floating in space?

2007-10-24 07:52:27 · 21 answers · asked by Anonymous in Astronomy & Space

3m^2 - 5m + 2

5s^2-17s+6

-6m+13m+28

thankyou!

2007-10-24 07:52:05 · 8 answers · asked by wiccankisses 3 in Mathematics

For the followng 0.10M aqueous solution.
NaCI, NaOH, KF, NH4Cl

This is my answer in order of decreasing pH.
NaOH, KF, NaCl, NH4Cl
most basic -> most acidic

Am I right? Why or why not?

2007-10-24 07:49:11 · 2 answers · asked by Tiffany 4 in Chemistry

a.) Anisole (C6H5-O-CH3)
b.)Benzonitrile (C6H5-CN)
c.)p-Toluenesulfonic acid

2007-10-24 07:48:21 · 1 answers · asked by student217 1 in Chemistry

I really need this info because wikipedia wont load on my internet. And i can't find any articles. i have a project due for tomorrow morning, so help would be sooo good!

2007-10-24 07:45:52 · 8 answers · asked by x-KittyKhaos-<3 1 in Earth Sciences & Geology

2007-10-24 07:45:35 · 4 answers · asked by smile 1 in Geography

2007-10-24 07:43:50 · 6 answers · asked by bayleighhpendleton 1 in Geography

4
8
2
1

2007-10-24 07:43:08 · 5 answers · asked by tia 3 in Chemistry

2007-10-24 07:42:46 · 4 answers · asked by Anonymous in Mathematics