Science & Mathematics - 21 July 2007

I have to write an essay about vertebroplasty, and I've been reading the books and they talk about "transpedicular" and "extrapedicular" approaches for putting the needle in. Can anyone please explain what this means, and what the different is between the two....

Thanks.

2007-07-21 23:57:24 · 5 answers · asked by ScienceBug 1 in Medicine

does going there and coming back to earth take the same time

2007-07-21 23:48:35 · 9 answers · asked by Rodman 2 in Astronomy & Space

Of course pi = 4 / (1-1/3+1/5-1/7+1/9-...)

and there are other infinite series that converge to pi.


But is this the fastest converging series?

Which series, defined using only integers and converging to pi is the fastest?

If I wanted to approximate pi using the first N terms of some series, what series would always get me the closest approximation for any given N? (is this known and is it proven?)

thanks.

2007-07-21 23:43:09 · 6 answers · asked by Juan Miguel M 2 in Mathematics

In your work you attempt to uncover secrets that nature hide from us, undo things that nature do to us, remake things that nature made but we're not satisfied with. Then on sundays you become a god-fearing man who goes to Church in a suit. Does this trouble you at all?

What if you teach evolution in college and at church you nod when the pastor talks about creation.

What if we were not meant to know all these things we know, are we sinning even more than if we were to relinquish our work and do nothing?

just some random thoughts

2007-07-21 23:19:29 · 9 answers · asked by Andy Holmes 3 in Other - Science

I'm looking for a book that best explores the philosophical implcations of modern physics (Quantum Theory, Relativity, etc) in straightforward terms.

Not too dumbed down though. I would like something that's challenging but accessible.

ty

2007-07-21 23:17:38 · 4 answers · asked by tuthutop 2 in Physics

حيوان اكل ذرة صغيرة بها هيدرو سيانيك اسيد فحدث تسمم اريد المادة التى اعطيها لها فى الحال حتى لا تموت الحالة

2007-07-21 23:09:21 · 1 answers · asked by Anonymous in Medicine

2007-07-21 23:00:15 · 4 answers · asked by Anonymous in Botany

Engineering

2007-07-21 22:52:27 · 5 answers · asked by jeromemelendres 1 in Engineering

2007-07-21 22:48:03 · 15 answers · asked by Anonymous in Astronomy & Space

2007-07-21 22:46:52 · 5 answers · asked by Anonymous in Mathematics

2007-07-21 22:46:11 · 8 answers · asked by garvin20002000 1 in Botany

2007-07-21 22:43:29 · 13 answers · asked by Anonymous in Astronomy & Space

2007-07-21 22:40:27 · 6 answers · asked by Ishneet S 1 in Mathematics

2007-07-21 22:37:39 · 3 answers · asked by Petz D 1 in Chemistry

what diameter is the collecting cylinder and what is the collecting surface area ? like if water is collected through a funnel whats the radius of the cone of the funnel ?
i made a simple one myself ..non standard though

2007-07-21 22:31:09 · 2 answers · asked by Anonymous in Weather

a) 3x^2 / x^3 - a^3 dx where a is a constant
b) 2x+4 / x^2+4x+1 dx
c) x squareroot 3x+4 dx

2007-07-21 22:17:30 · 4 answers · asked by fashaleviana 1 in Mathematics

i want know the answer from the morphology point of view

2007-07-21 21:57:32 · 2 answers · asked by erick 1 in Physics

ln(x^3-3x-1)^5
--------------------dx
(x+1)(x-1)

(x^2-3x)
------------dx
(2-4x)

5
-------ds
3-4^s

e^(3x)-2e^(2x)+4e^x-2
------------------------------...
1-e^x

e^[ln(5x-3)^2]
--------------------dx
5x-3

w(3w-2)(1+lnw)
-----------------------dw
w+lnw^w

2007-07-21 21:48:15 · 1 answers · asked by swit_babyangel 2 in Mathematics

please tell other than the following:
rain coat, umbrella, not to go near deep waters, drive slowly, wear cotton clothes...........

2007-07-21 21:47:40 · 8 answers · asked by gagan 2 in Weather

I live in the south of England, but i would love to see the northen lights..

2007-07-21 21:46:29 · 6 answers · asked by Anonymous in Astronomy & Space

2007-07-21 21:45:50 · 8 answers · asked by KAMYAR K 1 in Astronomy & Space

2007-07-21 21:30:32 · 4 answers · asked by Anonymous in Zoology

2007-07-21 21:24:55 · 3 answers · asked by Anonymous in Chemistry

2007-07-21 21:24:37 · 3 answers · asked by Anitha P 1 in Mathematics

sunny here in derbyshire

2007-07-21 21:23:42 · 23 answers · asked by surfer_ade_uk 2 in Weather

sOME Genius..

Please help my big bro. He is in a fix!.. I suck at math.

20points for the correct answer.

2007-07-21 21:23:38 · 2 answers · asked by Anonymous in Physics

Humans and animals somehow depends on plants to survive. Can plants survive even without humans and animals?

2007-07-21 21:21:11 · 2 answers · asked by Anonymous in Botany

Whats the difference between a comet shower 36 million years ago and the rate at which we see comets nowadays?
I read this article by the late Gene Shoemaker about a comet shower 36 million years ago.
http://mr.caltech.edu/media/lead/052198KF.html

Its called a comet "shower" even though it was spread out over two and a half million years. That sound like now with only a few comets we see in our lifetimes. If one lived back then, would one have seen more comets more often or what?

2007-07-21 21:13:04 · 2 answers · asked by MichelleMcD81 2 in Astronomy & Space

Respected Sir,
I am an INDIAN.I am here with
a question.Please send me reply after analysing.As
said by you people earlier,that our universe is
expanding,how can it expand? Let us consider our
earth our earth's weight is constant because every
thing born here is getting ended here itself.nothing
outside from earth is comming in contact with earth to
increase the size of earth.So,the weight of earth is
constant.If it expands with some thing comming from
outer space getting dumped in to earth so it expands
&it gets weightened.but nothing is comming from outer
space to increase the weight of earth.In the same way
if our universe is expanding,it should have place for
it's expansion.if so like that,then there should be
other universe.like our earth being one of the planets
in 10 planets revolving around sun,there should be a
no. of universe existing.but you people are saying
that our universe is going in expanding day to day.how
can this be possible?ok,on the basis of movement of
galaxies you are saying.but in a research you have
concluded that only 5% of our universe is filled other
95%being empty.here in our universe new stars being
born&old being died.everything is happening inside
our universe without any other thing entering our
universe entering from outside.our galaxies are just
moving away i.e.filling the remaining 95%of our
universe.So,if our universe is expanding,it's weight
must get increased.But there's nothing like
that.So,only two may be correct,
1.our universe must never be expanding.
2.like our universe there must be a no. of universes
in this super universe in which our universe&other
universe are small universe.
As the great person Einstien said that"limits of
universe is boundless"means there are bounds but we
can't determine it but it has limits as you said because without knowing limits howcan you people say that itis expanding. Like this way I have many doubts.


Thanking You,
Yours sincerely,
N.KRISHNA PRASAD.
personnel data-
NANDIVADA KRISHNA PRASAD85 M.I.G, 7 th PHASE, NEAR PLAY GROUND, K.P.H.B COLONY, HYDERABAD.-500072, ANDHRA PRADESH, INDIA

2007-07-21 21:11:25 · 8 answers · asked by krishna p 1 in Astronomy & Space

VECTORS IN 11-TH MATHS BOOK.(TAMIL NADU MATRIC. SYLLABUS)

2007-07-21 20:53:38 · 7 answers · asked by Anonymous in Mathematics