Science & Mathematics - 11 December 2006

I already ask and there is an answer but I don't understand. Because there is some things that confusing me. Plz helping me again....

2006-12-11 13:38:53 · 1 answers · asked by Help 1 in Mathematics

2006-12-11 13:37:56 · 6 answers · asked by Anonymous in Biology

Night is caused by the Earth coming between the sun's focus and the outer extreme. Day and night alternate because of the axial motion of the Earth V 35, Ch 1, P 585, Bk of Cosmogeny and Prophecy.

2006-12-11 13:36:43 · 3 answers · asked by Anonymous in Astronomy & Space

s the North Atlantic the North Pole? If it is not, then what exactly is the North Atlantic? I don't quite get it...

2006-12-11 13:35:47 · 4 answers · asked by Az 3 in Weather

20 cm of a stick are to the left of a fulcrum and 60 cm of the stick are to the right of the fulcrum. The stick is balnced by the hanging of two identical balls. One ball is at the end of the 20 cm to the left of the fulcrum, and the other ball is 10 cm to the right of the fulcrum. What is the ratio of the weight of the stick: weight of one ball.

2006-12-11 13:35:35 · 1 answers · asked by Justin F 1 in Physics

Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 330 million kilometers and take 7.0 Earth years to orbit about a point midway between them. What is the mass of each?

2006-12-11 13:35:31 · 1 answers · asked by Anonymous in Astronomy & Space

2006-12-11 13:34:38 · 6 answers · asked by charles b 1 in Engineering

Please! Help! I suck at chemistry!!! THANKS!!!

2006-12-11 13:33:54 · 2 answers · asked by D!@Nn@ 2 in Chemistry

2006-12-11 13:33:11 · 2 answers · asked by carsolrulis_5 1 in Zoology

I am a 16 year old girl and I want to be a doctor when I grow up. The only problem is, I can't stand the sight of blood. It makes me feel like throwing up. And once, I even fainted! How can I make my self stand the sight of blood?

2006-12-11 13:33:07 · 12 answers · asked by Anonymous in Medicine

I have a test tommorow over energy, work, and power, and was wondering if you could tell me if what have below is correct and maybe give me any more tips or information??

Energy- ability to do work
Work- must make something move to do work
W=Fd
Measured in Joules
Kinectic Energy- energy of motion
KE=.5mv^2
Measured in Joules
Potential Energy- Energy of position
PE=mgh
Measured in Joules
Power- rate at which work is done
P=W/t
measured in watts

Law of conservation of energy- energy can't be created nor destroyed in closed isolated system
Work-energy Theorem- work applied to object will equal change in energy of object (Still a little confused on this)

What happens to energies in closed isolated sstem?

Be able to calculate work done when force applied isn't exactly in direction of motion (Confused)

also is a kilowatt a watt with kilo (as in times by 1000?)

Thanks so Much

2006-12-11 13:32:35 · 3 answers · asked by Anonymous in Physics

I have a couple of coat hangers but I would think that there might be somethng easier to work with I have some beads but is there anything else?

2006-12-11 13:31:56 · 3 answers · asked by m g 1 in Biology

2006-12-11 13:30:55 · 11 answers · asked by Anonymous in Biology

2006-12-11 13:29:51 · 13 answers · asked by tasha M 1 in Mathematics

2^5x-1=3^2x+1

All i need to see is how to do this problem so i can figure out how to do the rest >.<

2006-12-11 13:29:04 · 4 answers · asked by Blake H 1 in Mathematics

2006-12-11 13:27:25 · 2 answers · asked by Anonymous in Chemistry

A stick is placed on a fulcrum so that 20 cm are on the left and 60 cm are on the right. Two identical balls are placed on the stick. One is at the end of the 20 cm on the left and the other is 10 cm from the fulcrum on the right. What is the ratio of the weight of the stick to the weight of a ball. (Maybe a diagram will help)
(- - - - - - - -)
o ^ o
^
^
^

(Sorry, It's the best i could do)

2006-12-11 13:26:57 · 1 answers · asked by Justin F 1 in Mathematics

2006-12-11 13:26:55 · 5 answers · asked by Fräulein Jaclyn 2 in Zoology

..ok i have this class where i'm supposed to redesign a vacuum cleaner....what are some advancements and ideas to make it more efficient and desirable..For example making them light weight could be an option...

2006-12-11 13:25:52 · 8 answers · asked by chaingang325 2 in Engineering

2006-12-11 13:24:24 · 8 answers · asked by Anonymous in Biology

2006-12-11 13:23:59 · 7 answers · asked by Anonymous in Biology

my answer is the PH of 1.40
here is the question
calculate the ph of a solution made by combining 200.00ml of 0.235M chlorous acid(Ka=1.2E-2) with 200.00ml of 0.200M hydrocyanic acid(Ka=6.2E-10) and 300.00ml of 0.150M ammonium chloride(Ka=5.6E-10)
if i am right just say i am right if i am wrong give me the heads up.

2006-12-11 13:23:30 · 2 answers · asked by smile 1 in Chemistry

2006-12-11 13:23:24 · 3 answers · asked by jamielikewoahhh 1 in Botany

2006-12-11 13:22:50 · 3 answers · asked by Anonymous in Biology

solve the equation for the given variable
A = 1/2bh ; b
please i need to see the process.

2006-12-11 13:22:36 · 8 answers · asked by fiori3092 3 in Mathematics

2006-12-11 13:21:38 · 6 answers · asked by Anonymous in Biology

please explain the answer ?

2006-12-11 13:20:57 · 7 answers · asked by james G 1 in Chemistry

If not why not?

2006-12-11 13:20:17 · 13 answers · asked by Anonymous in Physics

By lowering the temperature of their electric hotwater heater from 140 degrees fahrenheit to 120 degrees fahrenheit, the Kellys' average electric bill dropped by 7% to $60.45. What was their electric bill before they lowered the temperature of their hot water?

If anyone can show me how to do this problem, that'd be amazing.

2006-12-11 13:19:40 · 6 answers · asked by Danielle 2 in Mathematics

2006-12-11 13:19:18 · 2 answers · asked by norfauziah1007 1 in Engineering