Science & Mathematics - 30 December 2006

I need information about the life and work of Theodosius Dobzhansky. I'm writting a reharsal about how his social life influenced his work and his way of thinking... I don't pretend to copy the information, but i need to know a bit more, as I want it to turn into a really good work ;) and i thought you could help me....

I'm sorry for my english, but it's the best I can do as a portuguese girl :)

Thanks in advance*

2006-12-30 23:36:25 · 3 answers · asked by Ana P 2 in Earth Sciences & Geology

0 ⤊

evaluate 3 1/7 - 1 5/8?

2006-12-30 23:23:31 · 13 answers · asked by Shelly P 1 in Mathematics

0 ⤊

A question with Logarithms?

I am teaching myself maths and am attempting some exam questions in the book, I have managed all the others but this one has stumped me. So here goes

.

It says, Explaining each step claearly express

By the way, all logs are to the base 2

so Log(8 * 3^1/2) - 1/3log9/16

Express in the form p + qlog3 where p and q are rational numbers to be found.

I know the laws of logs, but if you could show each step that would be great.
The answer in the back is 13/3 - 1/6log3

Happy new year everyone too

2006-12-30 23:19:23 · 5 answers · asked by John W 2 in Mathematics

0 ⤊

What would happen if two unstoppable objects collided head on?

I like this question. Nobody knows the answer but me.

2006-12-30 23:15:21 · 15 answers · asked by wwwwwwwfe 1 in Physics

0 ⤊

Probability - Second moment?

I am confused by an equation where I believe the second moment is listed as E[A^2] (A squared). Is this the second moment of a function? I thought the second moment was the E{[X - E(X)]^2}.

2006-12-30 23:13:09 · 1 answers · asked by Mathboy 1 in Mathematics

9 ⤊

If some (or all?) of the evidence for the 'big bang' is 'red shifting'.?

surely we would only detect a red shift in one direction only (and possibly a 'blue shift' in the opposite direction), unless planet Earth is at the centre of the thing, in which case a star in ANY direction would appear red shifted?This 'big bang' thing sounds like trying to fit into a framework of words, something that is not so easily comprehensible?

2006-12-30 23:12:57 · 7 answers · asked by shyteforbrains 1 in Astronomy & Space

0 ⤊

where has are beautiful Michigan winters gone?

we used to have such pretty winters and they seem to be vanishing,is this a result of global warming or is michigan stuck? will we ever see these seasons back to normal?is the phrase winterwonderland a thing of the past?

2006-12-30 23:03:25 · 8 answers · asked by dana b 1 in Weather

1 ⤊

What makes a veggie a veggie and a fruit a fruit?

I just want to know what is the true definition of a fruit and a veggie? Why are they what they are? Tomato a veggie? Why? TELL ME WHY?

2006-12-30 22:52:37 · 7 answers · asked by Anonymous in Botany

3 ⤊

do any one know what is the meaning of pie 22/7?

2006-12-30 22:50:10 · 15 answers · asked by sayee 2 in Mathematics

1 ⤊

Is there a formula for solving su-do-ku puzzles?

2006-12-30 22:47:03 · 10 answers · asked by MVK 1 in Mathematics

4 ⤊

can we see the planets?

is it true that we can see the planets only with our eyes?
i saw an image on the web shows the place of them (they look like stars)http://rds.yahoo.com/_ylt=A9iby6B0oZdFAu4ALiyjzbkF;_ylu=X3oDMTA4NDgyNWN0BHNlYwNwcm9m/SIG=12cg763sl/EXP=1167651572/**http%3a//www.netwave.or.jp/%7em-motoki/JPG/six_planets.jpg

how can i recognize them when i watch the sky ?

2006-12-30 22:42:17 · 9 answers · asked by Nemo 3 in Astronomy & Space

4 ⤊

Do living being exsist in other planets???

2006-12-30 22:41:00 · 12 answers · asked by Rafaela 2 in Astronomy & Space

0 ⤊

Do TVs have static electricity?

I felt something 'zap' me when i touched the back of the TV when it was on. I think its charged up static electricity. Weak but I'm sure there's something. Can anyone help?

2006-12-30 22:36:51 · 13 answers · asked by Save_Us.925 2 in Physics

1 ⤊

Is it scientifically possible for us to ever come into contact with aliens?

-From a scientific perspective-
Do they exist? Will we ever meet them? What are they like? Where are they?

2006-12-30 22:27:52 · 10 answers · asked by ddzaszcxascs 2 in Astronomy & Space

0 ⤊

why cool things are sensed cold when touched?

2006-12-30 22:27:34 · 14 answers · asked by archanpagedar 1 in Physics

1 ⤊

With the superb technolgy at present, why can't the secular scientest create life?

At school the prof. could easily tell the origin of life. But why can't he/she show it at lab work? And if a mindless state could accomplish CREATING such spectacular grandeur -LIFE, how much more a flotilla of SECULAR scientists, funded by hundred million dollars, could do? Yeah, why not create life and silence the opposition.

2006-12-30 22:27:13 · 6 answers · asked by Anonymous in Biology

0 ⤊

Why the rainbow looks arc in shape?

2006-12-30 22:07:11 · 14 answers · asked by Anonymous in Physics

5 ⤊

Why is it so difficult to remove salt from water at a reasonable cost and on a large scale?

Given the increasing global need for water and man's ability to achieve incredibly complex scientific endeavours why is it so difficult to remove salt from water? After all nature does it all the time and we are able to treat human sewage and create potable water!
Thank you.

2006-12-30 22:01:22 · 8 answers · asked by Hedgehog 1 in Earth Sciences & Geology

0 ⤊