Science & Mathematics - 16 August 2007

2007-08-16 16:06:39 · 2 answers · asked by Anonymous in Earth Sciences & Geology

i just want pictures of stars in the night sky. no constellation names or star charts. pictures only. ive tried google and ask but i keep getting star charts and constellations which i dont what.

2007-08-16 16:03:33 · 7 answers · asked by Michael A 1 in Astronomy & Space

I was wondering earlier, could light have left our star or planet, traveled out into space, pass very close to a heavy object, slingshot around it, and head back to Earth where we could see it? Wouldn't be like we were looking back in time?

2007-08-16 15:54:03 · 15 answers · asked by robert 6 in Astronomy & Space

2007-08-16 15:44:53 · 8 answers · asked by Anonymous in Astronomy & Space

2007-08-16 15:39:11 · 6 answers · asked by Lou B 1 in Weather

When we have sqrt(a^2 - x^2)

we say that adj = sqrt(a^2 - x^2) right?

so, what do we use with

sqrt(a^2+x^2)
and with sqrt(x^2-a^2) ???

2007-08-16 15:38:31 · 1 answers · asked by newbie4_z 1 in Mathematics

2007-08-16 15:36:07 · 6 answers · asked by Felipe V 1 in Earth Sciences & Geology

My gearmotor runs at 9RPM, and i need to turn my wheel at that same speed (or faster) so i have 2, 10" pulleys. Right now i'm using a belt that measures 25 1/2" outside pulley to outside pulley. Once plugged in, the motor pulley turns fine but the wheel pulley starts to turn then stops as the motor continues turning. If i put a smaller pulley on the wheel, will that work better or should i get a longer belt??

2007-08-16 15:29:20 · 4 answers · asked by sawyerbrownlive 2 in Engineering

A water tank has the shape of a cone. The tank is 10m high and has a radius of 3m at the top. If the water is 5m deep (in the middle), what is the surface area of the top of the water??

2007-08-16 15:28:24 · 3 answers · asked by redsox_04_champs 2 in Mathematics

For those whom "know", please forgive this simpleton Question. Do we actually know for a fact via visual magnification that atoms and protons etc. are real? Or are they Quantum theory?. And following on from this, but not related, why is Q theory so trusted?.
To me it seems as irrelevent as UFO theories. Mathematical equations in QT are all guess'. Where is the proof that QT is fact? Proof is everything, and the fact that fields medal winners can't prove their equations outside QT; to me says they are wasting time and money on fantasy.
Surely physical facts must be proved physically to be fact! I realise QT is "widely" acknowledged to be fact, but until it is actual fact, why is it so relied upon?
All arguements welcome. P.s. For ten points you will need to answer all questions.

2007-08-16 15:16:40 · 6 answers · asked by pjklondon 2 in Physics

A) lithium does not exist in nature as a free element
B) the mass of lithium is the sum of the masses of the protons and electrons in the atom.
C) the mass of a proton is not exactly equal to 1 amu.
D) lithium has more than one isotope

2007-08-16 15:15:06 · 1 answers · asked by Anonymous in Chemistry

2007-08-16 15:10:44 · 11 answers · asked by G 1 in Engineering

13. Heyrogen sulfide H2S is a weak diprotic acid. In a 0.1 M solution of the acid the specie that would be expected to have the highest conetration is
a. H2S
b. H2O+
c. HS-
d. S2-
e. OH-

2007-08-16 15:02:28 · 1 answers · asked by Kristin R 2 in Chemistry

11. A 7.2 x 10^-3 M solution of acetic acid is 5.0% dissociated. In a 7.2 x 10^-2 M solution, the percentage of dissociation would be???
a. the same
b. >5%
c. <5%
d. zero
e. none of these

2007-08-16 14:58:26 · 1 answers · asked by Claire M 1 in Chemistry

If I spent 27.5hours out of 40 hrs or 0.6875 of time on a project. what would be the correct fraction? I came up with 3/4 or 7/10. Help.

2007-08-16 14:56:46 · 5 answers · asked by Anonymous in Mathematics

2007-08-16 14:47:53 · 4 answers · asked by Anonymous in Mathematics

x^2-18x

2007-08-16 14:45:50 · 6 answers · asked by spiritmoonshine 1 in Mathematics

or has it already ended? kansas'es is supposed to end supposedly next week with rain and a possible cold front. then we actually go into autumn season.

2007-08-16 14:45:31 · 10 answers · asked by Anonymous in Weather

Why are scientist looking for more mater in the universe to try and explain the big crunch.
The universe does not need any mater to contract.
As a mater of fact it would collapse a lot faster if there were no mater.
When mater decays then the universe will slow down and start to contract.
You see the universe is elastic and will revert back to its origonal state before the big bang..
After all its not gravity that made the universe it was the universe that made gravity....What do you think...?

2007-08-16 14:42:37 · 11 answers · asked by Anonymous in Astronomy & Space

its like storming really bad here (richmond VA) and the winds are amasing....but im wondering if its fast enough to make a car roll over?

2007-08-16 14:41:32 · 5 answers · asked by Anonymous in Weather

the 2 earthquakes in the san fernando valley

2007-08-16 14:40:56 · 3 answers · asked by chocolateT 2 in Earth Sciences & Geology

Looking for a low dew point average yearly. Include sources if you have one please. I have struggled looking this up for some time to find good resources online.

2007-08-16 14:34:53 · 4 answers · asked by gimsf 2 in Weather

I feel pretty stupid for forgetting how to graph y>x. Help please.

2007-08-16 14:32:33 · 3 answers · asked by Anonymous in Mathematics

2007-08-16 14:27:44 · 9 answers · asked by david g 1 in Astronomy & Space

a) common ratio?
b)expression nth term
c) show sum first 30 = 2 to the power of 26-4

2007-08-16 14:21:22 · 9 answers · asked by Anonymous in Mathematics

Andrea wants to go bowling early in the evening and then see a movie later. She has two kinds of bowling and four movies to choose from. In how many ways can Andrea spend her evening? It's a simple question, I know, but I need help plugging the numbers in the formula. - the proper way to go about solving it.

2007-08-16 14:20:26 · 3 answers · asked by Anonymous in Mathematics

2007-08-16 14:17:42 · 4 answers · asked by J B 2 in Medicine

2007-08-16 14:16:32 · 16 answers · asked by xxmelonie74xx 2 in Weather

What's the best way to be enviromently friendly, and to make the impact of Global Warmining less likely to happen?

2007-08-16 14:15:14 · 12 answers · asked by deepblueorchid 1 in Earth Sciences & Geology

1) Find the total surface area of a cylinder with radius 3 and height 8.

2) A sphere has area 64 pi. What is it's volume?

3) What is the volume of a cube with edge 2?

4) A rectangular solid with length 8 and width 3 has volume 28. Find it's height.

I have the answers but I just need it to be explained. Thanks!

2007-08-16 14:13:04 · 7 answers · asked by zxcvbnm 2 in Mathematics