Science & Mathematics - 30 September 2007

my solar panel shows a dc charge and an ac charge i was reading the nec code book and it says that there are ac and dc solar panels so i was wondering how to tell, also how would you find the wattage of something using a multimeter?

2007-09-30 15:01:25 · 8 answers · asked by rfbuhrow 1 in Engineering

2007-09-30 15:01:08 · 9 answers · asked by Anonymous in Astronomy & Space

Thanks again

2007-09-30 15:00:26 · 3 answers · asked by Damaris 1 in Mathematics

2007-09-30 14:56:54 · 7 answers · asked by Anonymous in Astronomy & Space

2007-09-30 14:56:00 · 3 answers · asked by future Mrs. Nick Jonas :) 1 in Chemistry

Thank you

2007-09-30 14:55:36 · 9 answers · asked by Damaris 1 in Mathematics

A 30kg block is at rest on a 31 degree incline. The coefficients of static and kinetic friction are .65 and .55 respectively. The accleration of gravity is 9.8m/s2. What is the frictional force acting on the 30 kg mass. Also, what is the largest angle which the incline can have so the mass does not slide down the incline

2007-09-30 14:55:26 · 1 answers · asked by akanthasy 1 in Physics

2007-09-30 14:54:08 · 9 answers · asked by Anonymous in Astronomy & Space

Find the slope and the y-intercept. y = –x

2007-09-30 14:53:53 · 2 answers · asked by Sweet 1 in Mathematics

2x^2 - 5xy + 2y^2


Thank you!!!

2007-09-30 14:53:11 · 3 answers · asked by C'est Comme Un Rêve 3 in Mathematics

maria is 6 time as old as tina , in 20 years , maria will be only twice as old as tina . how old is maria now.

2007-09-30 14:51:19 · 6 answers · asked by Anonymous in Mathematics

cyclohexae (C6H12) freezes at 6.55 degrees C. A solutionof 1.67 g of carbon disulfide (CS2) in 50.0g of cyclohexane freezes at -2.25 degrees C. What is the freezing point depression constant for cyclohexane??

2007-09-30 14:48:14 · 1 answers · asked by Anonymous in Chemistry

I need some help on solving this atwood problem. I already dound the first two components, I just need help figuring out how to and what equation to use for part C.) Please, solve out the entire portion if you can, because I have an idea of what equation to use, but I don't know HOW to solve for mass using it. Everything is provided in the pics! ty!

http://img.photobucket.com/albums/v84/Mittpuff/physics001.jpg
http://img.photobucket.com/albums/v84/Mittpuff/physics002.jpg

2007-09-30 14:46:14 · 1 answers · asked by Anonymous in Physics

2007-09-30 14:44:44 · 4 answers · asked by Shushan A 2 in Chemistry

but instead of using water. i want to try to mix baking soda and vinegar and pour it into the soil. cause plants love carbon dioxide? do you think this is a good experiment to test out for science fair? or do you think it'll kill the poor seeds due to it being so acidic?

2007-09-30 14:41:26 · 2 answers · asked by disbebegurl 1 in Botany

2007-09-30 14:41:17 · 5 answers · asked by Amanda 1 in Astronomy & Space

W + X + Y + Z = 2

W + 2X +2Y + 4Z = 1

W - X + Y + Z = 6

W - 3X - Y + Z = 2

What are the variables?

2007-09-30 14:40:49 · 4 answers · asked by ducatitodd 1 in Mathematics

Mi brother is a chemist and gave me a bag of this......? He said to me do not mix with water.........and what do you do ....?mix with water! Ruined all my brickwork! Was he right or was it somethig ELSE?

2007-09-30 14:39:28 · 6 answers · asked by christopher831@btinternet.com 1 in Chemistry

which of the folllowing shows that the length(l) varies inversely as the cube of the width(w)
A)L=W^3/k
b)kw^3=L
c)L=k/w^3
D)kL=w^3

2007-09-30 14:39:11 · 3 answers · asked by hgfdthgfdthgfdthgfdthgfdthgfdthg 1 in Mathematics

2007-09-30 14:37:13 · 6 answers · asked by STEPHANIE H 1 in Mathematics

A runaway truck lane heads uphill at 30° to the horizontal. If a 16000 kg truck goes out of control and enters the lane going 115 km/h, how far along the ramp does it go? Neglect friction.

2007-09-30 14:36:56 · 1 answers · asked by Nathan R 1 in Physics

What is the oxidation number of Mn in the compound:

KMnO4

I came up with 7, but the answer key says I am wrong

2007-09-30 14:36:37 · 3 answers · asked by Anonymous in Chemistry

omg!!!! i read that a huge astroid is predicted 2 hit earth in 2036!!!! is that true and if so r we going 2 all die!!!??.lol the last part sounds kinda funny

2007-09-30 14:34:31 · 8 answers · asked by I Eat Broken Crayons 1 in Astronomy & Space

Write the equation of the line passing through (–1, –3) and (2, –3).

2007-09-30 14:33:38 · 5 answers · asked by Jessica B 1 in Mathematics

2007-09-30 14:32:27 · 11 answers · asked by ayy bay bay<33 1 in Mathematics

If you burn a piece of magnesium, the mass of the piece increases. Why?

2007-09-30 14:31:46 · 6 answers · asked by Anonymous in Chemistry

2007-09-30 14:30:42 · 8 answers · asked by tanman 1 in Chemistry

2007-09-30 14:30:29 · 9 answers · asked by Anonymous in Medicine

A recycling center has 100 kilograms of shredded plastic yogurt containers. What volume is needed to hold this amount of shredded plastic? How many 10-liter (10,000 ml.) containers do they need to hold all of this plastic? Hint 1m^3 = 1,000,000

2007-09-30 14:25:20 · 2 answers · asked by Fruitsickle 2 in Mathematics

2007-09-30 14:24:03 · 5 answers · asked by Jessica R 1 in Chemistry