Science & Mathematics - 11 September 2007

This is a somewhat advanced question. Suppose that two elastic balls moving through three-dimensional space collide and rebound, conserving both kinetic energy and momentum. The balls cast shadows, and these shadows, moving over a flat two-dimensional surface come together, collide and rebound. Now pretend the shadows have mass. Suppose the the shadow of a ball has a mass porportional to the mass of the ball. Then, the colliding shadows:

a) conserve kinetic energy
b) conserve momentum
c) conserve both kinetic energy and momentum
d) conserve neither kinetic energy nor momentum

2007-09-11 16:56:20 · 1 answers · asked by ? 6 in Physics

I see a dark face to the right of the image under the pillow.. I also see an eye in the bottom left.

It's obvious those are spirits joining together to take the man to the other side (Heaven).. Could that be Satan on the right?

2007-09-11 16:55:59 · 7 answers · asked by Anonymous in Paranormal Phenomena

2007-09-11 16:54:18 · 4 answers · asked by Becca the Prankster 2 in Other - Science

Professor Steven Jones has actually tested steel samples from the towers, he definitely found thermate traces. The one major thing he did point out was 'yellow molten metal' flowing from the impact floors. Its on all the news footage so theres no denying it happened. Now the only material on earth that can flow yellow in a liquid state is thermate (Im no scientist but I would presume its the sulfur that makes it appear yellow.) Now Ive seen the videos, so have millions of people , most without realising what they were looking at. But Steven Jones is a very learned man, he studies things like this, and I believe what he has found is definite proof of thermate cutting charges. If you believe Bush's story or not you need to watch a free to air doco called "911 Mysteries" it offers up a multitude of reasons why 911 happened the way it did, most if not all of them scarily believable.....
The film maker Sofia Smallstorm cannot tell you that it definitely was an inside job, all she does is present the facts and once youve watched it you will start thinking....that much I can promise you.
And one more thing while Im here........the Bush apologists will always argue that the steel didnt need to melt to cause the floors to collapse, thats fair enough BUT. What they expect us to believe is that the support clips all failed at the impact floors which caused a pancake effect right??? Seems like a reasonable argument, even the official report tells us the floors pancaked. But there is one major flaw that they cant explain and Ill tell you what it is. For a floor to pancake it has to fall through space to hit the floor beneath it, this breaks the supports holding up the lower floor and so on (about 80 times till the mass reaches ground level.) now even if we give each floor an amazingly fast half second to travel through that space crushing all the support steel, girders, steel mesh, interior walls, office furniture etc, the real world time for the impact floors to reach ground level should have been around 40 seconds!!! (thats 80 storeys collapsing in a half second each!!!!
That plainly did not happen because THERE WAS NO PANCAKING!!!! The towers dropped within 14 seconds, almost as fast as freefal speed!!! And the only way that could have happened was by severing the 48 steel columns at the core, and probably severing the foundation steel in the basements also, there is no two ways about it.
The Bush apologists physics dont hold up to scrutiny, they dont hold up to critical analysis, and why so many videos all over the net showing survivors and firemen, cops and reporters all mentioning explosions inside the buildings?

2007-09-11 16:46:57 · 10 answers · asked by Anonymous in Physics

Their boss the guy who signs their checks says it is happening and something must be done.
http://www.terradaily.com/reports/Rupert_Murdoch_Changes_Mind_On_Global_Warming_999.html

Not only that he is making Fox a supporter of carbon offsets. http://bravenewfilms.org/topics/rupert-murdoch

looks like global warming is no longer a liberal issue. what do you think?

2007-09-11 16:43:01 · 4 answers · asked by Stainless Steel Rat 7 in Weather

i think no one will ever built a time machine it is very improbable and for those who '' know every single answer..''
the answer to this question is NEVER !!
give me a feed back you ''geniuses'' out there..

2007-09-11 16:41:05 · 5 answers · asked by roman d 1 in Physics

2007-09-11 16:38:41 · 1 answers · asked by Jonathan B 1 in Physics

1) For the ballistic missile aimed to achieve the maximum range of 1000 km, what is the maximum altitude reached in the trajectory in km.

2) For the intercontinental ballistic missile to have a range of 10,500 km, what must be the speed (v0) of the missile at the end of the acceleration phase? Take the distance of the acceleration phase, as negligible compared to the travel time. Answer in km/s.

2007-09-11 16:38:04 · 2 answers · asked by lola 1 in Physics

http://www.hud.gov/
http://www.nasa.gov/

2007-09-11 16:36:13 · 11 answers · asked by campbelp2002 7 in Astronomy & Space

2007-09-11 16:34:22 · 3 answers · asked by Anonymous in Weather

thanks for your help!!!!

2007-09-11 16:32:43 · 2 answers · asked by Anonymous in Astronomy & Space

And also how can you determine the percent of water by mass in popcorn? Does the mass of the kernel decrease or increase?

I'm thinking you have to measure the before and after, but how do I know that it's the mass of the water. About the second question, I think it will decrease, because it looses its water. Am I right about this?

2007-09-11 16:32:39 · 14 answers · asked by Anne 2 in Chemistry

When will the universe end...?

2007-09-11 16:31:12 · 25 answers · asked by emc.squared 1 in Astronomy & Space

helping my daughter with homework. when do by hand i get
322.179 when checked by calculator we get 322.280. i know my remainder of 179 is correct why is calculator showing dif remainder. i have had this before with another math problem...

2007-09-11 16:28:36 · 4 answers · asked by yvicks 4 in Mathematics

Why?? Is the amount of cells vital in this aspect? Can cells be limitlessly tinier

2007-09-11 16:28:31 · 6 answers · asked by fragment 1 in Biology

Determine the mass of aluminum that has the same number of atoms as there are in a) 6.29 mg Ag and b) 6.29 mg Au

2007-09-11 16:27:24 · 2 answers · asked by Anonymous in Chemistry

the bad guy beats up hero and ties him up. he jumps on his horse and goes 25mph. after 15 mins, the hero frees himself and takes off at 30 mph. how long before the hero catches bad guy, assuming horses don't get tired....
a. 2.21 hours
b. 1.25 hours
c. 75 minutes
d. both b and c

but it is 1.5 hours is it not/??

2007-09-11 16:21:53 · 10 answers · asked by kitten 3 in Mathematics

would there even be a climate?

2007-09-11 16:20:40 · 4 answers · asked by dreams 2 in Earth Sciences & Geology

2007-09-11 16:20:13 · 9 answers · asked by Anonymous in Mathematics

I need mosquitoes for my science project. do i have to breed them? how? (but i am afraid that the mosquitoes might carry a disease)
or

can i just replace them with another insect since im just testing the killing power of an insecticide? what insect then?

thanks :D

2007-09-11 16:19:28 · 3 answers · asked by backfire11811 2 in Biology

2007-09-11 16:17:08 · 8 answers · asked by facethefacts 1 in Zoology

The difference of 2 numbers is 12. 2 fifths of the greater # is 6 more than 1 third of the lesser #.? Find both numbers.
I NEED HELP W/ THIS PROBLEM, PLZ HELP!!!!

2007-09-11 16:13:20 · 4 answers · asked by Nicky 2 in Mathematics

2007-09-11 16:12:41 · 3 answers · asked by Carla Valenzuela 1 in Geography

I have a problem I need help with. Don't do it for me just explain what [x] means in the statement y= [x] -x

2007-09-11 16:11:06 · 3 answers · asked by Aaron4me 3 in Mathematics

Thank you sooo much!

2007-09-11 16:10:51 · 12 answers · asked by bk_royals 2 in Mathematics

Here is the question:

Chrysler has developed plans to scale down their Dodge Dakota pickup truck so that their 2005 model was 80.2% as big in all length dimensions as the 2004 model. What percentage of the previous amount of paint is needed for the new model? (The amount of paint required will be directly proportional to the surface area.)

Any help would be greatly appreciated.

2007-09-11 16:10:23 · 1 answers · asked by Anonymous in Mathematics

Stephanie serves a volleyball from a height of 0.79 meters and gives it an initial velocity of +6.7 meters per second straight up. How high will the volleyball go??

2007-09-11 16:09:21 · 1 answers · asked by lexxon0121 1 in Physics

2007-09-11 16:03:13 · 5 answers · asked by ERAddict 2 in Chemistry

2007-09-11 16:00:44 · 7 answers · asked by Anonymous in Zoology

a 1.500g sample of a mixture containg only Cu2O and CuO was treated with hydrogen to produce 1.252g pure copper metal. calculate the percentage composition of the mixture

2007-09-11 16:00:10 · 2 answers · asked by abchawaiixyz 1 in Chemistry