Science & Mathematics - 19 November 2006

How many calories are needed to vaporize 1200 grams of water at the boiling point? How many joules?

I got 648,000 cals. but how do you change it to joules? The answer is 2711232 joules, but i dont know how you get that answer.

2006-11-19 07:51:14 · 1 answers · asked by grace is good for you 2 in Chemistry

how to researchers and/or scientists obatain illegal or scheduled drugs for research purposes? Do you apply for them through the DEA and to be an eligible candidate, do they need a specific job or degree? Any help on this would be great. thx. (any websites that would help would also be great).
-CAP

2006-11-19 07:49:50 · 2 answers · asked by CAP 2 in Medicine

help me do this equation and plz show the formula thnx

2006-11-19 07:47:19 · 17 answers · asked by Anonymous in Mathematics

Who was the founder?

2006-11-19 07:47:11 · 3 answers · asked by Dna 1 in Botany

how can i express this in simplest from : i^16+i^6-2i^5+i^13

please explain, i appreciate everyone that helps

2006-11-19 07:45:33 · 8 answers · asked by BLUEEEE 1 in Mathematics

Suppose the r² value of your equation in #1 is .892. Interpret this number for our situation in #1

2006-11-19 07:45:08 · 1 answers · asked by ggyy80204 2 in Mathematics

Would a light beam that travels say 10m take less time than a light beam that travels 5m to a mirror gets reflected and travels 5m in the opposite direction?

I know light's velocity is constant but what happens at the point of reflection at the mirror at the photonic scale? Do the photons slow down to 0m/s then speed up in the other direction?

2006-11-19 07:44:38 · 4 answers · asked by benabean87 2 in Physics

2006-11-19 07:43:24 · 13 answers · asked by mapleafgal sweet an delicious 1 in Astronomy & Space

thank you so much!!!

2006-11-19 07:43:23 · 1 answers · asked by ggyy80204 2 in Mathematics

the question is:
in its approach to an airport ruway, an airplane of mass 1.24x10^5 kg has a velocity of 75.5 m/s [11.1 degrees below the horizontal] determine the horizontal and vertical components of its momentum

2006-11-19 07:43:00 · 3 answers · asked by M.K 2 in Physics

solve for x: (2/x)+(10/3x)=1

need help with this one, thanks

2006-11-19 07:41:42 · 4 answers · asked by BLUEEEE 1 in Mathematics

i have -4 plus minus , 2 infront of the square root of 3 divided by 2, but I don't know if it's right

2006-11-19 07:40:59 · 4 answers · asked by Charnissia S 1 in Mathematics

2006-11-19 07:38:45 · 14 answers · asked by hunt647 1 in Earth Sciences & Geology

A large turntable rotates about a fixed vertical axis, making one revolution in a time of T. The moment of inertia of the turntable about this axis is I. A child with a mass of m, initially standing at the center of the turntable, runs out along a radius.

What is the angular speed of the turntable when the child is a distance of R from the center? (Assume that you can treat the child as a particle.)

2006-11-19 07:38:42 · 1 answers · asked by Phys 1 in Physics

2006-11-19 07:38:41 · 1 answers · asked by Theory1 3 in Chemistry

I can't seem to find an equation to relate the variables. I calculated E = 1.76*10^-5 W/m^2 from the Stefan-Boltzmann Relationship, and I calculated my A = 2.12 m^2 and my T = 313.15 K, but I don't know how to come up with a rate of cooling. Any ideas?

Thanks! :-)

2006-11-19 07:38:27 · 1 answers · asked by JoeSchmo5819 4 in Physics

2006-11-19 07:37:28 · 3 answers · asked by hamzeeco 2 in Mathematics

2006-11-19 07:36:53 · 5 answers · asked by Hinry J 1 in Astronomy & Space

2006-11-19 07:36:32 · 8 answers · asked by Anonymous in Weather

2006-11-19 07:35:54 · 15 answers · asked by Anonymous in Botany

2006-11-19 07:34:41 · 6 answers · asked by Anonymous in Botany

Science question please help! Why must the nuclear membrane break down during mitosis? This is in the cell cycle

2006-11-19 07:34:10 · 4 answers · asked by watawatacrazy 3 in Biology

Need help on this problem Thanks.

Use analytic methods to find the intervals where the function f(x)=-2X^3+6X^2-3 is:
a.increasing
b.decreasing
c.concave up
d.concave down
e.local extreme values
f.inflection points

2006-11-19 07:33:16 · 2 answers · asked by venom90011@sbcglobal.net 1 in Mathematics

2006-11-19 07:33:07 · 3 answers · asked by feelinglikeastar 2 in Mathematics

2006-11-19 07:30:53 · 2 answers · asked by Anonymous in Biology

I take it for my sciatica pain every day.

2006-11-19 07:30:23 · 6 answers · asked by Justanian 1 in Medicine

solve for M G=T+Mf/M

show working please

2006-11-19 07:29:00 · 2 answers · asked by Anonymous in Mathematics

2006-11-19 07:28:12 · 36 answers · asked by Anonymous in Astronomy & Space

-Chemical properties of the "space" glue
-This research is for a chemistry project.

2006-11-19 07:27:09 · 5 answers · asked by James Y 2 in Astronomy & Space

2006-11-19 07:25:49 · 14 answers · asked by Anonymous in Astronomy & Space