Science & Mathematics - 18 July 2007

2007-07-18 15:31:41 · 14 answers · asked by clovergreenmoney 2 in Weather

2007-07-18 15:31:31 · 5 answers · asked by howmuchshedo 1 in Other - Science

2007-07-18 15:25:33 · 5 answers · asked by pkul2007 2 in Engineering

On the surface of a hypothetical planet X, the atmospheric pressure is 9.72 x 10^6 Pa, and the temperature is 702 K. On the earth's surface the atmospheric pressure is 1.00 x 10^5 Pa, while the surface temperature can reach 320 K. These data imply that the planet X has a "thicker" atmosphere at its surface than does the earth, which means that the number of molecules per unit volume (N/V) is greater on the surface of planet X than on the earth.

2007-07-18 15:23:30 · 2 answers · asked by Tam 1 in Physics

2007-07-18 15:22:37 · 3 answers · asked by pkul2007 2 in Physics

...extremely small, medium,and very long.These birds feed primarily on insects to trees and dirt requiring the beaks to workout the insects.A major freeze during the winter has killed off many of the insects in the topsoil this bird naturally feeds on so they are left with their prey that live in the nearby warmer trees.The birds with the largest beaks have the advantage of having acces to these "hard reached" insects and change the gene pool of this species due to their perpetuation and the loss of the birds whom could not reach their only food source.
1.which is the type of natural selection exibited in this example?
a.stabilizing b.directional c.extreme d.disruptive e.none of the above
2.in the next generation the offspring will primarily consistof individuals with what relative size of beaks?
a.none b.small c.medium d.large e.they all died
3.The new stress on this organism in it's environment is what?
a.pollution b.new predator c.excessive hunting d.loss of major food source

2007-07-18 15:22:35 · 4 answers · asked by lal m 1 in Biology

1. A postal truck leaves its station and heads for Chicago, averaging 40 mph. An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. If the car averages 50 mpg, how long will it take to catch the postal truck?

2. In the Klysler Auto Factory, robots assemble cars. If 3 robots assemble 17 cars in 10 minutes, how many cars can 14 robots assemble in 45 minutes if all robots work at the same rate all the time?

3. 3 times the first of 3 consecutive odd integers is 3 more than twice the third. What is the 2nd of the 3 consecutive odd integers? I did 3(x + x + 2 + x + 4) + 3 = 2(x +4) but didn't get it.

Thanks! Appreciated if you could show me all the steps algebraically.

2007-07-18 15:20:01 · 3 answers · asked by Anonymous in Mathematics

its homework please help!

2007-07-18 15:17:54 · 2 answers · asked by Anonymous in Engineering

phylum cnidaria

2007-07-18 15:15:44 · 4 answers · asked by Anonymous in Biology

2007-07-18 15:15:23 · 7 answers · asked by DJK 1 in Weather

Deliberately getting run over?

1. Check out the following video, is it for real?

2. Approximately, how much weight was applied?

3. Would you imagine that the driver felt a bump?

http://www.youtube.com/watch?v=K1OtLgfMv_g

2007-07-18 15:08:02 · 2 answers · asked by Yin, Mandy 2 in Physics

A baseball diamond is a square 90 feet on all sides. A player runs from first to second at a rate of 16 ft/s. At what rate is the player's distance from third base changing when the player is 30ft from first base?

2007-07-18 15:07:08 · 7 answers · asked by Lanksta 1 in Mathematics

Australian Biologist??

2007-07-18 15:06:48 · 11 answers · asked by kick_it_again 2 in Biology

Mechanical or aerospace engineering?
hi to everybody, this is my question:

I like aerospace engineering much more than mechanical engineering (but still I like it too), but perhaps aerospace is a very narrow field in which I won't be able to find many job opportunities or as much as if I were to study mechanical engineering. besides I think (eventhough I'm not completely sure) one can pursue a mechanical engineering degree which focuses/relates to the aerospace industry.

I will welcome any comments you may have and thank you very much

2007-07-18 15:06:01 · 4 answers · asked by Anonymous in Engineering

well this is a question i was unable to do.. we have to find the equation of a plane.. which is parallel to x-axis and we have the vector equation of the line.. so we need to cross product the direction vector of line and the other parallel vector to find the normal vector.. and then find the plane eq with the given pt on the line.. but the problem is what is the equation of the part.. PLANE PARALLEL TO X-AXIS? what will we denote it as and why???? help me ppllll

2007-07-18 15:05:58 · 4 answers · asked by Anonymous in Mathematics

I want to know the relationship that gives rise to lichens. and i want to name all of the members of the relationship, and explain what each gets/gives to the system.?

2007-07-18 15:03:32 · 3 answers · asked by FISH 1 in Biology

plant cell wall

2007-07-18 15:02:19 · 1 answers · asked by Anonymous in Botany

1. NaOH + KClO3 -->
2. NaOH + NaBr -->
3. NaOH + NH4Cl -->
4. NaOH + Na2SO4 -->
5. NaOH + KIO3 -->
6. NaOH + Na2S -->

Help Please!

2007-07-18 14:58:57 · 2 answers · asked by cbrice9 1 in Chemistry

All through Dartmouth, New Bedford, etc. there are small stone walls used as property lines. Where did all the stone come from and why did so many people use it in the area?

2007-07-18 14:55:52 · 3 answers · asked by John K 1 in Geography

2007-07-18 14:55:49 · 3 answers · asked by Anonymous in Zoology

2007-07-18 14:55:21 · 9 answers · asked by Anonymous in Mathematics

half a pill?
a full pill?
I dont need to hear " don't do it" trust me..I dont even own Vicodin. My boyfriend snorts it sometimes..so I wanna know what is so great about it? what does he get out of it?

2007-07-18 14:53:29 · 8 answers · asked by valda 1 in Medicine

Because since air is made up of basically nitrogen and oxygen chemically combined, and water is made up of hydrogen and oxygen, why isn't a molecule of air heavier because hydrogen weighs a lot less and the total atomic mass of the elements of each one put together would mean air weighs more. I do not understand why it weighs less. Please help.

2007-07-18 14:52:56 · 5 answers · asked by TaCaBu 2 in Chemistry

Please some one answer this b/c my friend and I got into a heated debate about this yesterday, to the point that he bet his iPhone, and i bet $600. He thinks that the earth spinning on it's axis forces a centrifugal force that makes the moon move around the earth. I, on the other hand, think that it is caused sort of like a sling shot as the moon comes closer gravity slings shots it back around us but not enough to escape earths gravity thus bringing it back around us again. Another debate we had was that he thinks we get a full moon when the moon is between the earth and the sun and the light on the moon is caused by a reflection from the earth, whereas I think that a full moon is when the moon is on the opposite side of the earth from the moon and light goes around the earth to hit it!!!!! somebody please help, I think I should get the iPhone, but I need to know the answer first.

2007-07-18 14:49:05 · 11 answers · asked by somerandomguy702 2 in Astronomy & Space

Yuhp. its for my science project. . =]

2007-07-18 14:42:15 · 4 answers · asked by Anonymous in Biology

It seems, that if an animal had chlorophyll in its cellular make up , and could generate it's own energy that would be positive feature for insuring it's evolutionary survival.

2007-07-18 14:41:04 · 2 answers · asked by hwroberts 1 in Botany

if a large enough asteroid struck earth how would everyone be killed? could people in a bunker or bomb shelter be live? How long before humans could come out of the bunkers? could life survive on earth?

2007-07-18 14:39:26 · 12 answers · asked by Anonymous in Astronomy & Space

If r varies directly with s and t, and r= 20 when s = 2 and t = 5, what is the value of t when r = 40 and s = 5


please explain how to do this

2007-07-18 14:39:20 · 4 answers · asked by wu_4533 2 in Mathematics

Please help....Thanks from a 7th grader

2007-07-18 14:36:54 · 3 answers · asked by Anonymous in Mathematics

...extremely small, medium,and very long.These birds feed primarily on insects to trees and dirt requiring the beaks to workout the insects.A major freeze during the winter has killed off many of the insects in the topsoil this bird naturally feeds on so they are left with their prey that live in the nearby warmer trees.The birds with the largest beaks have the advantage of having acces to these "hard reached" insects and change the gene pool of this species due to their perpetuation and the loss of the birds whom could not reach their only food source.
1.which is the type of natural selection exibited in this example?
a.stabilizing b.directional c.extreme d.disruptive e.none of the above
2.in the next generation the offspring will primarily consistof individuals with what relative size of beaks?
a.none b.small c.medium d.large e.they all died
3.The new stress on this organism in it's environment is what?
a.pollution b.new predator c.excessive hunting d.loss of major food source

2007-07-18 14:33:49 · 5 answers · asked by lal m 1 in Biology