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Science & Mathematics - 11 November 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

2007-11-11 14:21:36 · 7 answers · asked by GEVOR S 2 in Zoology

2007-11-11 14:19:56 · 6 answers · asked by ? 2 in Engineering

I really want to go to UNLV (university of Nevada Las Vegas), but unfortunately they do not offer Geography as a major at all, is there a program I can do through them or something to still get a degree in it?..I really want to go there, but I really want to majro or minor in Geography, I can not think of a better school!

2007-11-11 14:17:57 · 2 answers · asked by Anonymous in Geography

bone has a young's modulus of about 18E9 Pa. Under compression, it can withstand a stress of about 160E6 Pa before breaking. assume that a femur is .50 m long, and calculate the amount of compression this bone can withstand before breaking

2007-11-11 14:17:22 · 1 answers · asked by Ashley P 1 in Physics

a) The activation energy of a certain reaction is 37.2 kJ/mol. At 20 degrees C, the rate constant is 0.0130 s^-1. At what temperature would this reaction go twice as fast? (I got part a - answer: T_2 =33.9 degrees C. Just need help on part b)

b) What would the rate constant be at a temperature of 100 degrees C?

2007-11-11 14:15:03 · 1 answers · asked by Mike S 1 in Chemistry

http://www.youtube.com/watch?v=kht_rJs38Y4

2007-11-11 14:14:44 · 10 answers · asked by Anonymous in Other - Alternative

The strength of a rectangular beam is proportional to its width times the square of its depth. Find the dimensions of the strongest rectangulare beam that can be cut from a 12 in. diameter log.



I assumed the strongest beam to be a square rectangle, with sides eqaul to the square root of 72...But I'm not sure how to solve for the depth at all, and i dont know if I need to equations to relate to determine the maximum of the function. Please Help.

2007-11-11 14:13:09 · 5 answers · asked by captobvious1231 2 in Mathematics

re-introducing species into a new environment.
like my assignment is to write a scientific paper on the reintroduction of say, the european starling in north america, but i can ONLY use primary sources

where can i find these?!??!?!

2007-11-11 14:11:27 · 3 answers · asked by Anonymous in Zoology

2007-11-11 14:11:23 · 5 answers · asked by nic b 1 in Botany

When I was a student, this idea was sold as fact. Scientist have an an annoying and arrogant habit of presenting theories as facts. The most idiotic thing that I have read by Stephen Hawkins was informing his readers that science would soon explain everything! To me this showed him to be less of a genius and something more of an idiot. It is a totally unscientific statement.

2007-11-11 14:11:11 · 12 answers · asked by Peter A Child 1 in Astronomy & Space

I've noticed the big map & satellite photo sites that everyone knows about (Google etc.) tend to focus on the United States and often don't have detailed maps or images of places elsewhere in the world.

What's a good website for good coverage of other countries - particularly Indonesia and Malaysia?

2007-11-11 14:10:41 · 5 answers · asked by stevemdfwtx 2 in Geography

2007-11-11 14:05:54 · 1 answers · asked by Anthropomorphic 2 in Botany

2007-11-11 14:03:48 · 2 answers · asked by Anonymous in Astronomy & Space

2007-11-11 14:02:25 · 2 answers · asked by Panaskysue 1 in Geography

a 3.0 kg block starts from rest at the top of a 30 degree angle incline and accelerates uniformly down the incline, moving 2.00 m in 1.50s .

it asks for accelertation which i got and its= 1.78 m/s^2
asks for speed of block after it has slid a distance of 2.0 which i got and its = 2.67 m/s
it asks for frictional force on the block and coefficient of kinetic energy between the block and incline i cant get these two can some one help me PLEASE!!!!!!!!!!!

2007-11-11 13:57:00 · 1 answers · asked by Anonymous in Physics

I need to draw a bay for my homework.

2007-11-11 13:53:27 · 4 answers · asked by Ixel 2 in Geography

Do you think there is life on other planets? Do you think god created life on other planets than earth. There are so many planets in different galaxies that we would never be able to know about..does anyone have any evidence honestly about any form of life or think they have seen something that is a possiblitly of being extra terrestrial

2007-11-11 13:52:16 · 10 answers · asked by chester123 2 in Astronomy & Space

2007-11-11 13:50:19 · 2 answers · asked by Ashley W 1 in Botany

2007-11-11 13:47:47 · 2 answers · asked by rosievega2781@sbcglobal.net 1 in Engineering

2007-11-11 13:46:17 · 8 answers · asked by Anonymous in Astronomy & Space

I need help drawing particle pictures cause i have no clue how to draw them. I tested 5ml, 10ml, 20ml, and 30ml.
When 5ml the can crushes the most, when 30ml crushes the least. how do i draw this?

2007-11-11 13:45:21 · 1 answers · asked by Fun&Sweet 3 in Physics

Well i jsut did an experiment where i heated copper sulfate then i weighted the contents.

Here are my observations:

mass of crucible + lid= 20.144g
mass of crucible + lid+ copper sulfate = 23.827g
mass of copper sulfate 3.689
mass of crucible + lid+ contents= 22.577g

I need to find the mass of the hydrate used.

Calculate the mass of water of hydration lost.

and calclate the mass of dehydrated salt remaining (CuSO4)


Can anyone help me on these 3 problems. Can anyone help me out?

2007-11-11 13:44:02 · 1 answers · asked by Anonymous in Chemistry

2007-11-11 13:43:12 · 1 answers · asked by jwhitesj 2 in Chemistry

if the problem is

x^-2y^-12/x^-6y^-2, would you have to simplify it first or switch it--- x^6y^2/x^2y^12

2007-11-11 13:43:03 · 8 answers · asked by wingman 1 in Mathematics

Starting with 14.6 ml of 4.20 x 10-2 M AgNO3, how many grams of KBr can be added to the solution before AgBr begins to precipitate ?

2007-11-11 13:41:13 · 1 answers · asked by SomeOne 1 in Chemistry

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