Science & Mathematics - 10 December 2006

Round each of these measurments to three sig figs?

A. 0.000 763 21 cg

B. 57.048


this is not a homework problem...a practice problem

2006-12-10 11:44:52 · 2 answers · asked by Anonymous in Chemistry

A woman 5.5 ft tall walks at a rate of 6 ft/sec towards a streetlight that is 22 ft above the ground. At what rate is the length of her shadow changing when she is 15 ft from the base of the light?f

Have at it...first correct answer gets 10 pts.!!!

2006-12-10 11:44:17 · 1 answers · asked by Seanoso88 1 in Mathematics

e^2x - e^x - 20 = 0
Solve the exponential equation

How do I do this?

2006-12-10 11:43:11 · 2 answers · asked by Anonymous in Mathematics

Next year I will be heading off to undergrad college, right now I plan to major in psych (maybe double major with philosophy) and go to med school, so I was looking at the clubs that are offered as a way to stand out for med school. There are some that interest me, but I was curious how many extra-curricular clubs/organizations successful applicants to med school were in during their 4 years of undergrad studies?

2006-12-10 11:42:56 · 5 answers · asked by ploscultist 1 in Medicine

if i want to increase a frequency do i increase, or decrease a resistor?

2006-12-10 11:42:07 · 4 answers · asked by Anonymous in Engineering

LIGHTS IN THE NIGHT SKY CIRCULAR AND MOVING AMONG THE NIGHT CLOUDS

2006-12-10 11:41:12 · 6 answers · asked by GINA B 1 in Weather

I'm told to use double integrals to calculate the area of the region bounded by

y = 2x
x = 0
y = 1 - 2x - x²

I know how to set up and calculate the double integral, so I don't need help with that.

However, when I graph this, I see two different regions that are bounded by these lines, one region to the left of x = 0 and one to the right of x = 0. Am I seeing this correctly?

(I'm going to calculate the area for both regions, unless someone can prove to me that there is only one region with these bounds.)

2006-12-10 11:39:16 · 2 answers · asked by q_midori 4 in Mathematics

2006-12-10 11:38:33 · 10 answers · asked by tominh l 1 in Other - Science

please help me. i need search results for my science project. thank you!

2006-12-10 11:37:46 · 2 answers · asked by snowyangel 2 in Engineering

i need to know pronto.

2006-12-10 11:35:52 · 7 answers · asked by Anonymous in Astronomy & Space

how do you know what places switch?

2006-12-10 11:34:49 · 3 answers · asked by Willy 2 in Chemistry

Is the classic description of electricity travelling in a circuit based on electrons whizzing around at the speed of light? If so, regardless of the low resistance of the cables, why don't the wires in my walls get incredibly hot? In a lightbulb the high resistance of the filament "slows down" the electrons causing them to give off energy in the form of heat and light. This doesn't make sense to me. If electrons are "bumping into" tungsten in the lightbulb they must also be "bumping into" copper in the cables. Due to the numbers of collisions and the speeds involved, surely huge heat should be generated? Does anything actually "move" around a circuit? Let's call an electron "John". Does John move from point A to point B which is further along the circuit, then to point C etc. etc.
If not, what exactly is moving through the cables? Or is the classical picture just inadequate to describe the transfer mechanism(s).

2006-12-10 11:33:30 · 12 answers · asked by ? 1 in Physics

2006-12-10 11:33:06 · 6 answers · asked by Anonymous in Mathematics

2006-12-10 11:31:58 · 7 answers · asked by JAMES 4 in Physics

2006-12-10 11:31:07 · 4 answers · asked by Anonymous in Mathematics

My project is related to using a tennis ball and racket. I would like to know what would be a good question and / or hypothesis to use for my project. Answer soon please it is due tomorrow.

2006-12-10 11:30:51 · 2 answers · asked by suraj_krsna1 2 in Physics

2006-12-10 11:30:51 · 2 answers · asked by celticevening 1 in Mathematics

3x+9=5

2006-12-10 11:29:22 · 5 answers · asked by Crazy Carl 1 in Mathematics

A cat is chasing a mouse. The mouse runs in a straight line at a speed of 1.5 m/s.
If the cat leaps off the floor at a 30 degree angle and a speed of 4.0 m/s, at what distance behind the mouse should the cat leap in order to land on the poor mouse?

2006-12-10 11:29:06 · 3 answers · asked by physicsmed22 1 in Physics

I dont understand the what to do with the range they give
- pi < x < pi ??????

2006-12-10 11:28:50 · 4 answers · asked by rachel123go 3 in Mathematics

2006-12-10 11:28:29 · 12 answers · asked by jessewiah 1 in Mathematics

im looking for a converter type of site

2006-12-10 11:28:17 · 1 answers · asked by Anonymous in Engineering

2006-12-10 11:28:02 · 8 answers · asked by Anonymous in Chemistry

i want to know 3 citation about that and citatio nmeans quotaing

2006-12-10 11:26:40 · 2 answers · asked by manifantastic 1 in Astronomy & Space

2006-12-10 11:25:50 · 2 answers · asked by Anonymous in Biology

I Reckin' That we use them Redox Way of Doin' These, or sumthin like that:
A) Mn O2 + H2 SO4 + H2 C2O4
B) SbCl5 + 2KI >>>> SbCl3 + 2KCl + I2 << done, but is it right?
C) S + HNO3 >>>> SO2 + NO +H2O
D) HNO2 + HI >>>> NO + I2 + H2O

2006-12-10 11:25:19 · 1 answers · asked by Anonymous in Chemistry

Ok, i've done a lot of research on this fact, some say that it will be the end some say this:

This is what's happening on 12-21-2012: The Mayan Long Count calendar is rolling over from 12 Baktuns to 13 Baktuns (similar to our calendar going from 1999 to 2000 except a Baktun is 400 years long). Also on that morning, which is the winter solstice, there will be an astronomical alignment between the sun and the dark spot on the Milky Way at dawn.

The Maya believed that the dark area of the Milky Way was the birth canal of the universe, so when the sun came up through that dark area, it was being reborn (so you had that part of it correct). But our old world wasn't going to die at that moment. It's already dead and has been for years.

Ya, i found that online, but what really is going to happen then? Please i need to know. I hope that this doesn't happen cuz i'd really like to have a family, and i'd only be 19 than.

2006-12-10 11:24:28 · 11 answers · asked by Anonymous in Astronomy & Space

2006-12-10 11:23:28 · 4 answers · asked by MAC 1 in Botany

why is it that when you mix paint colors, you get brown, but when you mix light colors (or spin the color wheel) you get white? theoretically, all colors together make white, right? so where does brown come in when you mix paint colors?

2006-12-10 11:23:05 · 4 answers · asked by hobo 6 in Other - Science

I have a science brochure about Pluto do tomorrow and I've searched everywhere and I can't find the answer.

2006-12-10 11:21:51 · 4 answers · asked by happy13213 2 in Astronomy & Space