Science & Mathematics - 9 August 2007

2007-08-09 16:18:40 · 3 answers · asked by Anonymous in Mathematics

A sample of a vegetable dye scraped from a cave painting was converted to CO2 for C-14 determination. The radioactivity of the CO2 was measured as 3.76 counts per minute per gram of carbon( c.p.m). The C-14 in a living organism has 15.3 c.p.m. and the half-life of C-14 is 5760 yr. How old is the painting in years? (Answer to 3 significant figures and use e notation for power of 10, e.g. 1.23e2 for 1.23 x 102)

2007-08-09 16:13:40 · 2 answers · asked by Anonymous in Chemistry

2007-08-09 16:13:27 · 6 answers · asked by ragincajun87123 2 in Weather

go here
http://www.nysedregents.org/testing/mathre/b-607.pdf
# 31 and #32
i know the ans but dont know how to do the work and i'm taking the math b test nxt week

thanx

2007-08-09 16:12:59 · 7 answers · asked by insherry girl 2 in Mathematics

Serbian and Montenegro dinar?
I have a bill that is from yugoslavia that is now serbia. It's 10,000 dinar. I'm having a hard time finding out how much it is worth. In some places i think that it is considerd a euro but some say that it's not. I would greatly apperciate it if anyone could tell me what it's worth.

2007-08-09 16:09:22 · 3 answers · asked by crazyboo2804 2 in Geography

2007-08-09 16:01:02 · 6 answers · asked by Anonymous in Biology

2007-08-09 15:59:01 · 3 answers · asked by Anonymous in Biology

im speaking for all age groups. I look through old yearbooks, and senior classes looked alot older than they do now. And just a couple of years ago, fifty seemed so old, and now sixty seems young. And my parents always told us how old their grandparents seemed, and they dont seem too old. is it just because im getting older too and seeing myself as neither old or young, or are people aging slower these days.

2007-08-09 15:58:39 · 2 answers · asked by Anonymous in Biology

is the same work of school pleas help

2007-08-09 15:56:40 · 2 answers · asked by Anonymous in Chemistry

2007-08-09 15:54:40 · 4 answers · asked by puggers 1 in Weather

http://answerboard.cramster.com/physics-topic-5-91042-0.aspx

2007-08-09 15:54:17 · 4 answers · asked by Anonymous in Physics

2007-08-09 15:53:29 · 6 answers · asked by Anonymous in Astronomy & Space

2007-08-09 15:51:34 · 3 answers · asked by Anonymous in Physics

2007-08-09 15:51:26 · 9 answers · asked by kingjay50 1 in Astronomy & Space

2007-08-09 15:49:44 · 1 answers · asked by snowhite 1 in Biology

plz solve the following differential equation completely....
4D2y-4D1y+y=0;
where D1 &D2 denotes the and second derivatives respectively...

2007-08-09 15:48:17 · 3 answers · asked by chandra p 1 in Mathematics

plz solve the following differential equation completely....
4D2y-4D1y+y=0;
where D1 &D2 denotes the and second derivatives respectively...

2007-08-09 15:48:13 · 2 answers · asked by chandra p 1 in Mathematics

2007-08-09 15:47:54 · 7 answers · asked by mowerhead 2 in Mathematics

Will it severely burn or irritate tissues?

2007-08-09 15:45:32 · 5 answers · asked by Pansy 4 in Medicine

okay so use all the numbers 0-9, added up to make a hundred.
first person to do it gets best answer.
you may make the numbers into larger numbers like 72+13+6... and so on..
good luck

2007-08-09 15:39:52 · 5 answers · asked by miss lyss 2 in Mathematics

2007-08-09 15:37:53 · 2 answers · asked by gabeezalbub 1 in Chemistry

I love Star Wars. I always see huge ships like Imperial Star Destroyers, Republic Cruisers, and The Invisible Hand then I wonder if it is possible to build spacecraft that big. I know that ships that big would be too heavy to be built on Earth so it would have to be built in space but is that possible?

2007-08-09 15:32:03 · 7 answers · asked by Emanueal W 2 in Engineering

just wondering :)

2007-08-09 15:26:24 · 3 answers · asked by intman2805 1 in Chemistry

Since it's wrong what theory am I supposed to believe in? I can't remember my exact source but I'm almost sure it's either Carl Sagan or Jessica Alba. You would think it would have made a bigger splash than it did. I'll bet Oprah could get to the bottom of it!

2007-08-09 15:23:53 · 8 answers · asked by Anonymous in Astronomy & Space

...prolonged standing, etc?

2007-08-09 15:21:45 · 3 answers · asked by Pansy 4 in Medicine

2007-08-09 15:19:33 · 10 answers · asked by Anonymous in Biology

In a few weeks I start my first term as grad student in the math department and I am a GTA. I will be in charge of 4 recitation sessions for calculus courses. Just wondering what to expect.

2007-08-09 15:18:46 · 3 answers · asked by bob8763763 2 in Mathematics

For odd denum:
cos(pi/3) + cos(3*pi/3) + cos(5*pi/3) = 0

for even denum :
cos(pi/4) + cos(3*pi/4) = 0
cos (pi/6) + cos(3*pi/6) + cos(5*pi/6) = 0
etc.

Is there any general formula for this?
I need this to prove sumthin.

Thanks Before.

2007-08-09 15:17:23 · 1 answers · asked by Anonymous in Mathematics

A) To find that remperature, would you set (1) 5Tc, (2) 9Tf = 5Tc, or (3) Tf=Tc? why? B) find the temperature.

2007-08-09 15:14:05 · 7 answers · asked by Josh Muller 1 in Physics

Say there is a 150 ton steam engine headed on way at 70 m.p.h. and a 60 ton Main battle tank (MBT) headed 40 m.p.h. the other and they collide head on at a combined speed of 110 m.p.h. Which would be me most recoganizable?

The locomotive weighs over 3 times as much and has much more momentum, but the tank is much more heavialy constructed for it's size than the train and pond for pound is much stronger. So what do you think?

2007-08-09 15:12:36 · 5 answers · asked by Anonymous in Physics