Science & Mathematics - 12 October 2007

2007-10-12 11:30:25 · 6 answers · asked by alatheaescapedez 1 in Engineering

please show work

2007-10-12 11:29:05 · 3 answers · asked by yu.s@att.net 2 in Mathematics

I cant smoke the good green stuff, and the doctor gave me this for depression and stress...i know the good green stuff takes care of me...but with it being illegal, i cant smoke it...i dont really llike pills...but my doc gave me this...is this some what the same as the good green stuff? or would i be wasting time taking them? thanx.

2007-10-12 11:28:59 · 0 answers · asked by geno o 2 in Medicine

What does the symbol S with three lines through it mean? It looks like money sign with an extra vertical line through it. Thanks!

2007-10-12 11:26:47 · 1 answers · asked by Anonymous in Mathematics

Based on einstien's explanation of the photoelectric effect, why does increasing the intensity of the light source used in the experiment not cause the photoelectric effect to happen?

2007-10-12 11:26:05 · 3 answers · asked by Anonymous in Chemistry

A person pushes a 13.0 kg lawn mower at constant speed with a force of 78.0 N directed along the handle, which is at an angle of = 45.0° to the horizontal.

1. Calculate the horizontal retarding force on the mower

2. Calculate the normal force exerted vertically upward on the mower by the ground.

3. Calculate the force the person must exert on the lawn mower to accelerate it from rest to 1.2 m/s in 2.0 seconds

2007-10-12 11:24:58 · 2 answers · asked by angeleyez000000 2 in Physics

At the star of the trip, a car’s speedometer reads 34,627 kilometer while at the end reads 35,118 kilometer. If a trip takes 8 hours, what was the cars average speed?
show me how u get it>>,,,..

2007-10-12 11:23:50 · 6 answers · asked by cielo a 1 in Mathematics

2007-10-12 11:19:07 · 5 answers · asked by Mercury 2010 7 in Astronomy & Space

using your age, weight, etc. thanks :]

2007-10-12 11:18:59 · 2 answers · asked by ms.problemsolver 3 in Physics

The trig function is: sin^2(x/6)
I have as an answer:
2cos(x/6) - ((1-x)/(6))

The process I used was chain rule and on the x/6 part of the chain rule I used the quotient rule.

Is this correct, is my procedure correct, if not please tell me where I went wrong, thanks!

2007-10-12 11:11:54 · 10 answers · asked by ret80soft 1 in Mathematics

If anyone could explain how the following is done, it would be very much appreciated!

A composite number is considered a Carmichael number if the congruence a^(m-1) ≡ 1 (mod m) is true for every number a with gcd(a,m)=1.

Verify that m = 561 = 3 * 11 * 17 is a Carmichael number.

2007-10-12 11:08:48 · 1 answers · asked by oldtimer 2 in Mathematics

If two snowboarders on top of a mountain let gravity pull them to the bottom of the slope, who would reach the bottom first if snowboarder #1 weighs 70 pounds more than snowboarder #2 and there was no wind or ground resistance?

Additional info (if needed): Slope of the mountain has a 30 degree decline.

2007-10-12 11:00:25 · 4 answers · asked by Odrama 1 in Physics

A. True
B. False

2007-10-12 10:59:58 · 14 answers · asked by princessarianna33 1 in Biology

I understand that longitudinal waves are some kind of electromagnetic phenomenon, but I don;t understand how they may be distinct from commonly referred to electromagnetic forces.

2007-10-12 10:59:42 · 1 answers · asked by blue weaver 1 in Physics

An elevator of mass m rises a vertical distance h with upward acceleration equal to one-tenth g. how much work does the elevator cable do on the elevator

I know the answer is 1.1 mgh but i dont know how to get this . when i do it i get .1mgh so i dont know where the extra 1 comes in

2007-10-12 10:58:44 · 1 answers · asked by fhsdjfsd 2 in Physics

Crude gunpowders often contain a mixture of potassium nitrate and charcoal (carbon). When such a mixture is heated until reaction occurs, a solid residue of potassium carbonate is produced. The explosive force of the gunpowder comes from the fact that two gases are also produced (carbon dioxide and nitrogen), which increase in volume with great force and speed. Write the unbalanced equation for the process.

2007-10-12 10:58:04 · 4 answers · asked by lindaalicious 3 in Chemistry

2007-10-12 10:55:06 · 3 answers · asked by myYahoo 1 in Mathematics

Hi, ok question one: Are isosoceles, sometimes, always or never equilateral?

Also do you know of any good websites where I can get step by step examples of when you need to find x, and y, with parrellel lines and a transversal. I wish I could put up an example of what I am talking about but, not sure how. So, thank you very much!

2007-10-12 10:52:58 · 9 answers · asked by Dogna M 4 in Mathematics

2007-10-12 10:51:58 · 3 answers · asked by kris 1 in Astronomy & Space

And how does anyone with common sense believe the media and not architects, engineers, pilots, demolition experts, and scientists???? No, the people at popular mechanics know all! LOL, LMAO,ROFL. Freefall in the path of most resistance!! DE DE DEEEEE LOL, LMAO

2007-10-12 10:49:46 · 6 answers · asked by stonehouse421 2 in Engineering

hey anyone know how to do this? I need help..

1. 4^9 times 4^7 times 4^1

2. b^2 times 4b^10

3. 7x^-8 times 6x^3

2007-10-12 10:48:26 · 5 answers · asked by Sam 1 in Mathematics

2007-10-12 10:47:46 · 4 answers · asked by Anonymous in Mathematics

2007-10-12 10:47:20 · 0 answers · asked by Anonymous in Mathematics

http://abcnews.go.com/US/TenWays/story?id=3719791&page=1

2007-10-12 10:44:04 · 7 answers · asked by Anonymous in Weather

My teacher gave me this and also said there may be no soultion so don't strees too hard over it. thanks :)

4x + 2y = 6y + 1x

2007-10-12 10:43:47 · 13 answers · asked by AHauntingNearU 2 in Mathematics

2007-10-12 10:42:36 · 30 answers · asked by Shauntelle M 1 in Earth Sciences & Geology

2007-10-12 10:39:00 · 5 answers · asked by Anonymous in Geography

If Providence Canyon in Georgia can be formed in 150 years, is it unreasonable to think that the grand canyon may have been formed in far less time than what is popularly believed?

A link to information about Providence Canyon
http://www.georgiaencyclopedia.org/nge/Article.jsp?id=h-943

2007-10-12 10:37:10 · 3 answers · asked by unworthychild 5 in Geography

http://s223.photobucket.com/albums/dd78/floodtl/?action=view¤t=AppleBattery.jpg

2007-10-12 10:36:56 · 3 answers · asked by Anonymous in Physics

2007-10-12 10:35:47 · 9 answers · asked by Anonymous in Mathematics