Science & Mathematics - 10 August 2007

We like the Zodiaq colors that are made with 97% quartz. Is there a big negative impact on the environment by taking quartz from the earth?

2007-08-10 16:09:28 · 2 answers · asked by Sheila 2 in Earth Sciences & Geology

2007-08-10 16:06:34 · 14 answers · asked by Anonymous in Other - Science

Strange question, I know...=)

2007-08-10 16:01:30 · 5 answers · asked by dianah 4 in Engineering

7 need to times(x) how many 1.20 to get numbers 10 000??

2007-08-10 16:00:25 · 7 answers · asked by Anonymous in Mathematics

I have won something everyday for almost a week. I have never had this happen before but I feel as though something 'cosmic' was going on. Does anyone have a formula or had this phenom happen? I'd like to hear a way to try to channel my luckiest days or time of the day.

2007-08-10 15:59:02 · 10 answers · asked by Big Boss 1 in Parapsychology

and when it's hot the water takes forever to get hot...Shouldn't it be automatically hot in hot weather and automatically cold in cold weather?

2007-08-10 15:53:59 · 7 answers · asked by Anonymous in Weather

39. The equilibrium system 2H2S(g) <-> 2H2(g)+S2(g) at a given temp was found to contain 1.0 mol H2S 2.0 mol H2 and 0.40 mol S2 in a 2.0 L containter the equilibrium constant is ???

40. Given the equilibrium S)2Cl2(g) <-> So2(g)+Cl2(g) delta h =+67 kJ the concentration of SO2 at equilibrium will be increased by???

41. In which of the following reaction does a decrease in the volume of the reaction vessel at constant temperature favor formation of the products???
a. H2(g) +I2(g)<-> 2HI(g)
b. MgCO3(s)<-> MgO(s) <-> MgO(s)+CO2(g)
c. NO2(g)+CO(g)<-> NO(g)+CO2(g)
d.2H2(g)+O2(g)<-> 2H2O(g)
e. 2O3(g)<->3O2(g)

42. For a specific reaction which of the statements can be made about an equilibrium contant?
a. it always remains the same
b. it inc. when the concentration of one of the products is inc.
c. it changes with changes in the temp
d. it inc. when the concentration of one of the reactants is inc.
e. it can be changed by the addition of a catalyst

2007-08-10 15:48:02 · 3 answers · asked by Kristin R 2 in Chemistry

In ABC if BC is one inch longer than AB, AC is 10 inches shorter than the sum of BC and AB , and the perimeter of ABC is 72 inches, find the length of BC

2007-08-10 15:47:25 · 13 answers · asked by Mosh 1 in Mathematics

2007-08-10 15:47:24 · 3 answers · asked by peggy d 1 in Geography

give me your thoughts.

2007-08-10 15:42:41 · 8 answers · asked by Anonymous in Biology

A golfer hits a golf ball with an initial velocity of 100 miles per hour. The range R of the ball as a function of the angle θ to the horizontal is given by R(θ) = 672sin(2θ), where R is measured in feet.

At what angle θ should the ball be hit if the golfer wants the ball to travel 450 feet (150 yards)?

2007-08-10 15:41:39 · 2 answers · asked by Anonymous in Mathematics

Lets say it is 10:00 PM on Friday and you get into the time machine and travel back to 10:00 PM Wednesday, wouldn't you end up appearing in space somewhere due to the movement of the planets around the sun?

2007-08-10 15:38:43 · 9 answers · asked by Anonymous in Physics

when sulfur and oxygen react to form sulfur trioxide?

2007-08-10 15:36:22 · 2 answers · asked by Anonymous in Chemistry

pls help me!!

2007-08-10 15:33:07 · 2 answers · asked by jenny74 1 in Chemistry

Cu + HNO3 --> Cu(NO3)2 + NO2 + H2O

2007-08-10 15:32:39 · 2 answers · asked by Anonymous in Chemistry

You've heard that space is a vaccum (A state of being sealed off from external or environmental influences; isolation) and that it is expanding, so what is it expanding in to? What is on the other side?

2007-08-10 15:30:01 · 9 answers · asked by mike w 1 in Astronomy & Space

I really want to know... Can you tell me pls? Thanks a lot!

2007-08-10 15:29:05 · 3 answers · asked by Nostradamus 3 in Physics

pls. help!!!

2007-08-10 15:27:04 · 1 answers · asked by jenny74 1 in Chemistry

What does it mean, and why is it there......


Also.......Are the equations for exponential growth, decay, etc.... that were used in elementary algebra in high school really just differnetial equations in disguise? or what do you think?

2007-08-10 15:25:56 · 5 answers · asked by Anonymous in Mathematics

I've been planting an Indian tree on a certain area in our front yard. But everytime the height of the tree reaches 5 meters and its principal root reaches I guess 4 or 5 meters, too, the tree would then start to turn into brown in color and totally dies. I wonder what is wrong or what is beneath that no plant could grow in that certain area? According to a contributor, it might be because of high watertable and salinity. If that would be the case, I wonder why the other two trees of same length 1 meter away from it did not die. Please help. I can't find sites that could give me exact answers. Thank you.

2007-08-10 15:20:37 · 4 answers · asked by orange28 1 in Earth Sciences & Geology

2007-08-10 15:20:26 · 9 answers · asked by Anonymous in Zoology

I know this sounds stupid but I want to make sure that I have this right. Is the continental divide basically where water starts running the opposite direction?

2007-08-10 15:19:34 · 6 answers · asked by Michael N 1 in Geography

is anyone else out there clairvoyant, telepathic, have remote viewing, or retro.... something ..... its when you know what happened in the past in a place..... or have anything else like that? :o)

2007-08-10 15:16:45 · 13 answers · asked by cadence23 1 in Other - Alternative

2007-08-10 15:16:19 · 5 answers · asked by miz21087 2 in Geography

2007-08-10 15:07:03 · 7 answers · asked by Kalyan s 1 in Earth Sciences & Geology

My daughter and I found this stone on our beach on the shores of Lake Erie outside of Buffalo, NY. It is a smooth stone with multiple round "divots" in its surface. These 'divots' are perfect and smooth. I have included these pictures for reference. Please help us solve the mystery of this rock. What caused this? Is it common? My three year-old is asking me questions and I would like to give her some answers. Thank you!!!!

http://i62.photobucket.com/albums/h106/shezarealgem/rock1.jpg
http://i62.photobucket.com/albums/h106/shezarealgem/rock2.jpg

2007-08-10 14:32:26 · 4 answers · asked by shezarealgem 2 in Earth Sciences & Geology

that basicly says it all

2007-08-10 14:22:40 · 5 answers · asked by Hottie 2 in Weather

Adderall and my long term health?
I just started today with a 20 mg extended release....i felt great....no mild mood swings that i sometimes have (not severe), i was more focused, and felt good and confident and my head was clear........I am 20 yrs old and in good physyical health and very healthy and have never been on meds before and am just using this med to treat my slight problem w/ focus and attentiveness. If i just stick with my one tablet a day, will I become addicted? Ive never been addicted to anything before? Also, I don't want to tkae the drug if it has negative long term side effects or if I'll be crazy different once i discontinue...but i look online and i dont get much info....it basically only says people with heart problems before taken the drug can experience worse heart conditions....but what about someone like me who is in good physical shape? I don't want to compromise this.

2007-08-10 14:20:33 · 5 answers · asked by Steven G 1 in Medicine

it should be a good one if its clear because its a new moon (no moon to light the sky making the shooting stars easier to see)

2007-08-10 14:20:17 · 8 answers · asked by AlwaysWondering 5 in Astronomy & Space

This came from my textbook called Physics for Scientist and Engineers, and there are two problems I'm having trouble with (This is my AP Physics summer HW)

1) The consumption of natural gas by a company satisfies the empirical equation V= 1.50t + 0.00800t^2, where V is the volume in millions of cubic feet and t the time in months. Express this eq in units of cubic feet and seconds. Put the proper units on the coefficients. Assume a month is 30.0 days.

2)When a droplet of oil spreads out on a smooth water surface, the resulting "oil slick" is approx. one molecule thick. An oil droplet of mass 9.00 X 10^--7 kg and density 918 kg/m^3 spreads out into a circle of radius 41.8 cm on the water surface. What is the diameter of an oil molecule?

If you got those, thank you very much, but really, i don't expect you to solve those, but i'm desperate, and if there happens a guy who can solve those, i'll be lucky.

2007-08-10 14:20:14 · 5 answers · asked by serpentine022 2 in Physics