Science & Mathematics - 5 November 2007

2007-11-05 13:07:43 · 3 answers · asked by ? 2 in Zoology

My specific question is...

The molecular weight of water is 18 amu. Therefore 18grams of water (=18mls H20) contains Avogadro's number of water molecules. What is the size (or dimensions) of a water molecule. I also need to clearly state my assumptions?!

How do i go about this problem?

Thanks for your help!

Jody

2007-11-05 13:07:37 · 4 answers · asked by Anonymous in Chemistry

the dot product of vector u and v is multiplied by the cross product of u (u.v x u). what does this equal?


like generallly

2007-11-05 13:04:55 · 3 answers · asked by mystery_girl07 2 in Mathematics

2007-11-05 13:02:15 · 26 answers · asked by Anonymous in Astronomy & Space

ASAP please.

2007-11-05 13:01:35 · 12 answers · asked by hate mi kill mi nam mi raw !!! 2 in Chemistry

Are there any practical applications of the square root of 2 in careers or in daily life? If so, how does it affect you?

2007-11-05 13:00:25 · 1 answers · asked by just asking 4 in Mathematics

2007-11-05 12:59:55 · 1 answers · asked by Anonymous in Physics

2007-11-05 12:59:50 · 3 answers · asked by Anonymous in Zoology

A 873-kg (1930-lb) dragster, starting from rest, attains a speed of 26.3 m/s (58.9 mph) in 0.59s.

My teacher is only making us do book work and i'm really stressing because i don't know how to dso this, we're barely learning about forces.... help and thankyou

2007-11-05 12:56:56 · 2 answers · asked by Anonymous in Physics

I was really good at algebra last year and I got great grades all the way through because I could understand it. This year, however, I have geometry and I just can't grasp it and it's making me so frustrated! I don't get why it's so hard for me! It's making me feel so stupid. What can I do to make it a little easier to understand? How come I understand algebra and not geometry?

2007-11-05 12:55:26 · 4 answers · asked by Amber 2 in Mathematics

Which point is on the graph of the equation 3x +6y=27?
(0,9)
(5,2)
(1,-5)
(-5,7)

Don't both (5,2) and (-5,7) work? If not, how did you do the problem?

2007-11-05 12:54:15 · 6 answers · asked by Phillipa Chicken 1 in Mathematics

2007-11-05 12:54:14 · 12 answers · asked by ♥Alilynn♥ 3 in Mathematics

During a heavy snowstorm....what causes, what we call ...thunder snow and lightening as well.

2007-11-05 12:53:50 · 3 answers · asked by Jay D 1 in Weather

2007-11-05 12:53:15 · 1 answers · asked by Anonymous in Physics

What is the answer for
Given that : log_5 x = 4log_x 5 Find x
The answers is 1/25 and 5 but the working.........

2007-11-05 12:53:08 · 3 answers · asked by A A 1 in Mathematics

Which of the following is not an example of a parallelogram?
rectangle

trapezoid

rhombus

square

The diagonals must be congruent in which of the following?

a rectangle

a parallelogram

a trapezoid

none of these

2007-11-05 12:51:47 · 4 answers · asked by Lizzie 5 in Mathematics

2007-11-05 12:49:36 · 3 answers · asked by NoTrigger 2 in Chemistry

2007-11-05 12:48:43 · 6 answers · asked by Christina 3 in Mathematics

SOMEONE PLZ HELP!!!!!

2007-11-05 12:45:29 · 5 answers · asked by thinkaboutit 2 in Chemistry

I have a question regarding physics.
Its about launching a spring at various targets (bucket) at different distances and heights.

WHat would be the equation to find the amount of stretch from equilibrium (in the string) i.e. x. We are given the vertical height, horizontal distance, the constant of the spring (k) and

Any help would be appreciated. Thank you in advance

2007-11-05 12:44:28 · 1 answers · asked by Anonymous in Physics

2007-11-05 12:43:02 · 3 answers · asked by Stephanie<33 2 in Botany

to determine if a substance is pure, looking for this, in a standard reference tabl, will help you identifly the substance.
a. crystal structure
b. colour
c. state
d. density

2007-11-05 12:42:24 · 2 answers · asked by Joanne M 1 in Chemistry

2007-11-05 12:40:35 · 9 answers · asked by Trisha P 1 in Chemistry

2007-11-05 12:40:27 · 3 answers · asked by Anonymous in Physics

Ok my first beef is with the big bang theory. You are siuggesting that the universe was created from an explosion, and is expanding...but the universe is nothing. So "nothing" was created from a massive explosion? So if the big bang created the universe, which is nothing, then you are suggesting that there was something there before this massive explosion. So what was there? The way i see it, the universe is infinite. Nothingness goes on forever and ever...and even if you could reach the edge of the universe...what is on the other side?

2) Special Relativity. You are trying to tell me that such properties as mass, time, and length will be altered by going at the speed of light or close to that speed? That violates such basic rules as the conservation of mass does it not? The way I see it, my mass is the same sitting here at the computer as it is going the speed of light in a warship. Please clarify these two things for me

2007-11-05 12:40:17 · 2 answers · asked by Anonymous in Physics

4 Skool we hav 2 do a sceince fair project.
I want 2 do somthin with Fossilization.
My three materials are (opossume) Bones, chert, and tree bark.
I want to c what one fossilizes faster.
Any1 kno any experiments I could do???
Websites???
Anything???

2007-11-05 12:35:25 · 2 answers · asked by Anonymous in Botany

i'm 14 and i know for sure that i want to be an equine and small animal veterinarian. what are some good colleges to look into when im a senior and what classes should i take throughout high school. im a freshmen rite now.

2007-11-05 12:32:39 · 5 answers · asked by singingcutie369 1 in Zoology

2007-11-05 12:32:15 · 1 answers · asked by Anonymous in Chemistry

so something i can put into my calculator to find the sum of all the proceeding numbers to one number

2007-11-05 12:31:56 · 2 answers · asked by biggoof125 1 in Mathematics

2007-11-05 12:31:22 · 1 answers · asked by Anonymous in Chemistry