Science & Mathematics - 11 October 2006

In my kitchen area I have 3 ceiling light fixtures, each of which takes 4 standard screw-in bulbs. Each fixgture is controlled by a separate dimmer switch on the wall. I just replaced the old bulbs with energy-saving bulbs, the kind that have a standard screw-in base but the actual bulb looks like a spiralled tube. Each bulb is 60 watts. My dimmer switches are now making a buzzing sound, not very loud but noticeable. Why? Is this a problem? What can/should I do about it?

2006-10-11 15:35:43 · 8 answers · asked by PaulCyp 7 in Engineering

A flask with a mass of 147.21g is filled with a sample of volatile liquid and is heated to 98 degrees celsius. upon cooling the new mass of the flask with the condensed liquid is found to be 147.68g. the volume of the flask is determined to be 135.6mL and the atmospheric pressure is 743.5 torr. what is the molar mass of the volatile liquid?

2006-10-11 15:33:56 · 2 answers · asked by crazymonkey 1 in Chemistry

2006-10-11 15:31:37 · 5 answers · asked by Anonymous in Chemistry

(12x^3 + 20x^2 + 6x + 17) divided by (3x + 5)
the answer in form of Q(x) + R(x)/3x+5, where
Q(x) is the quotient and R(x) is the remainder
of the division..
help, its another one thats killing me

2006-10-11 15:27:45 · 4 answers · asked by Anonymous in Mathematics

I want to clearify the all peoples having the property of thinking and sight that uptill no man reac at the surface of moon ......... may be in future it will possible .........
But the todays Story is trulyy 99% Fraud .......... and so many peoples are beleiving on it without using their sense of sight ...... lets see why i not beleive on it............
When u watch the video Of raching at Moon ...... u will see following unscientific and logical mistakes ......
1. If u look at the mountains or hills in the film ...... u will found that all hills have the same design ..... lets think???
2. How the flag of America is flying ? There is no air there on moon....................lets think???
3. How the shadow of astronauts is formed ...... scientists calculations for distance of moon and sun tell that no shadow of anything can form there ............ lets think
These points shows that , the film is made in the studio of america to show that we r the first to reach there....

2006-10-11 15:27:18 · 13 answers · asked by TruthExposer 1 in Astronomy & Space

how many moles are there in 5.0 moles of silver ??

2006-10-11 15:26:46 · 5 answers · asked by oscar 3 in Chemistry

If we started from a point (say a working clock face reading 12:01am) and raced away from that point (say because of THE big bang) at less than the speed of light, how can we look back at the clock and hope to see what it looked like at 12:01am (that is the big bang)? That is although the clock will appear to be running slower (for as long as we can see it), it doesn't stop because we are travelling slower than light away from it.

Can you please explain it like you might to someone whose knowledge of science doesn't extend beyond what we learnt at juniour high school?

2006-10-11 15:26:31 · 10 answers · asked by Byron Wu 1 in Astronomy & Space

2006-10-11 15:25:21 · 7 answers · asked by Steve H 1 in Other - Science

2006-10-11 15:24:55 · 4 answers · asked by Anonymous in Biology

tell me the detail

2006-10-11 15:23:12 · 14 answers · asked by htang60 2 in Mathematics

2006-10-11 15:21:58 · 1 answers · asked by Reid S 1 in Mathematics

when does a seed become a "living" organism? And why cant we make the few constituent compounds in a seed synthetically or borrow them and cobble together a truely novel life form?

2006-10-11 15:20:28 · 4 answers · asked by akamadscientist 1 in Botany

If the Universe has a defined border and and were closer to one end than another, would we be able to tell? If we can see out far enough, and thus back into time, enough to see billions of years ago in every section of the sky....are we the center of the Universe?

2006-10-11 15:18:18 · 17 answers · asked by Anonymous in Astronomy & Space

2006-10-11 15:15:03 · 3 answers · asked by chica1012 2 in Earth Sciences & Geology

Use the annual information found that can be found by going?
Use the annual information found that can be found by going to this link: https://mycampus.aiu-online.com/courses/... to answer this assignment. Calculate the following asset activity ratios for the end of 2005:
1.Average Collection Period
2.Inventory Turnover
3.Total Asset Turnover
To receive full credit on this assignment, please show all work, including formulae and calculations used to arrive at financial values.

2006-10-11 15:13:28 · 3 answers · asked by NONE N 1 in Mathematics

thank you!

2006-10-11 15:08:53 · 6 answers · asked by Feed the models! 4 in Mathematics

1. why does dipping meat in salt preserve it?
2. why can't we save water by using seawater to irrigate our crops?
3. what happens when a thirsty person drinks salt water to try and quench their thirst?

2006-10-11 15:06:24 · 5 answers · asked by generalche22 3 in Chemistry

2006-10-11 15:00:07 · 7 answers · asked by Michael W 2 in Biology

2006-10-11 14:58:43 · 4 answers · asked by Anonymous in Zoology

(dy/dx)^2=(x^2/y)
these powers are powers
not derivatives
so its the 2nd derivative=x squared over y

2006-10-11 14:49:03 · 2 answers · asked by Questionqueen 2 in Mathematics

2/x - 4 = 3x
show work

2006-10-11 14:48:40 · 3 answers · asked by Nikitty 2 in Mathematics

2006-10-11 14:47:37 · 10 answers · asked by riverratbliffen 1 in Physics

If f(x) is an exponential decay curve then the derivative of f(x) is increasing and negative.

Is this correct?
If not what's the answer?

2006-10-11 14:45:46 · 6 answers · asked by ? 1 in Mathematics

2006-10-11 14:45:31 · 6 answers · asked by Anonymous in Physics

2006-10-11 14:44:29 · 7 answers · asked by Flash 2 in Astronomy & Space

2006-10-11 14:43:50 · 5 answers · asked by patrick s 1 in Biology

ln A = ln h - ln(1 - h)
Solve for h

2006-10-11 14:42:39 · 4 answers · asked by HJS 1 in Mathematics

OK...It's obvious that the last one was just too easy. (Or maybe the winner is brilliant?) So here is a much tougher math brain teaser. Good luck to all who try.

>>> 255 135 216 514 817 <<<

Is 817 correct or not? Why or Why not?

Please be complete in your answer to win.

2006-10-11 14:40:09 · 8 answers · asked by Smart Dude 6 in Mathematics

na

2006-10-11 14:39:16 · 8 answers · asked by ray g 1 in Astronomy & Space

Having a little bit of trouble... In the redox reaction using Cu and Ag

Cu (0) -----> Cu (2+)

2Ag + + 2e- ------> 2Ag (0)

I do not understand how you get the +2 charge on Cu

2006-10-11 14:37:15 · 4 answers · asked by Anonymous in Chemistry