Science & Mathematics - 28 November 2006

2006-11-28 09:51:22 · 5 answers · asked by i_leanon_eyelean 1 in Mathematics

I asked a question like this a few days ago, and got nothing resembling consensus for an answer:

Imagine a frictionless world, that just happens to have a safe plummeting to the ground. The safe has a flat bottom which is perpendicular to the direction it is falling. Does the air impart a force on the safe opposite the direction of it's fall? What is that force called? Is it "air resistance"? If it is, is there a difference between air resistance and air friction, and what is it?

Thanks!

2006-11-28 09:50:54 · 2 answers · asked by chrissorry 1 in Physics

2006-11-28 09:48:43 · 4 answers · asked by Kathy B 1 in Mathematics

everything starts when i was child 12 years old after i was lost from my village and everybody search to find me i was lost about 1 day and after that they found me from same night i sow a dream about one woman with some kind of armor shyning and she was blond with greeneyes she tuch me at my eyes something hapenet like earth shakes and next day i talk one strange language differend from others and every night i go for sleap i always see her in my dreams in any dream she is there everytime she is changeing from day to day she dresset in whit red black gold silver her hair is long and some times short but still she is the same never ageing she teachingme things about my past she say that i am different and this body i have its not my body that i am from other world she says that she is my real mother till now i wright this language she give me and i try to find from somewhere somebody who speaks the same language some experts i am now 33 years old pleas tell me honestly can you helpme

2006-11-28 09:47:23 · 4 answers · asked by argadiamou 1 in Physics

for example 16cups = ___ gal

2006-11-28 09:46:41 · 4 answers · asked by andreawich1 1 in Mathematics

i have to measure lengths of paper when transferring from a 4 inch diameter roll to a 2 inch, typically in 4,5,8.and 10meter lengths.i use an approximate method based on the number of turns it takes to roll off 1 metre. and multiplying it by the number of metres i need. obviously,however,the diameter of the smaller roll increases the more paper is rolled on.making this method increasingly more inaccurate the more paper required.does anyone know of a wheel measuring device that would be in contact with the paper on the larger roll,giving a more accurate read out?

2006-11-28 09:46:39 · 1 answers · asked by our marm 2 in Engineering

Find the length of the diagonals AC and BD.
This question has me completly perplexed.

Drawing: http://img361.imageshack.us/img361/7348/pgramxc9.jpg

Thank you so much

2006-11-28 09:45:08 · 5 answers · asked by Samantha J 1 in Mathematics

Which of the elements below has no valence electrons?
a) Ar+ b) Ga+ c) Mg+2 d) S-2 e) F-

I don't know what it means by "no" valence electrons. Does that mean it has eight, but since it's filled it essentially means 0? Even though, I end up with Mg+2, S-2, and F- as the ones that have 8 valence electrons. But the question didn't say atoms or ions, it said elements. So would I forget about the charges and choose the "element"? What what be the correct choice?

2006-11-28 09:45:00 · 3 answers · asked by chris m 2 in Chemistry

I mean we have so many skyscrpaers all across the world in places like newyork, tokyo and Dubai. Just imagine how dangerous those tall structures could be in the event of a Bombing or fire. It's like being in a forest having to say Timber!!!

2006-11-28 09:44:41 · 2 answers · asked by Anonymous in Engineering

please help asap

2006-11-28 09:43:11 · 3 answers · asked by Anonymous in Astronomy & Space

2006-11-28 09:42:18 · 17 answers · asked by Robert Haydock 1 in Biology

Does anyone know who discovered the proton, neutron and electron, and when?

2006-11-28 09:42:05 · 1 answers · asked by *love_life* 2 in Physics

Asssuming that they work the same rate?

Someone answer me that ASAP!

I think it might be 2

2006-11-28 09:41:57 · 8 answers · asked by Nathan D 1 in Mathematics

2006-11-28 09:41:02 · 2 answers · asked by no name 1 in Physics

can someone help me about factoring binomials and trinomials, or explain the rainbow method? any help at all would be great. examples would help too. my teacher is on dope so she didn't explain it too well and i don't even know how to start this assignment she gave today.

2006-11-28 09:39:10 · 4 answers · asked by Trevor B 2 in Mathematics

the other day it was raining for about an hour so when i left me house I wore my balaclava then all of a sudden it stopped raining and i pulled of said balaclava then I saw a rainbow went to the end of it what do you know no fcuking gold
why do they say there is a pot of gold at the end of a rainbow do you think they pulled my leg?

2006-11-28 09:38:58 · 8 answers · asked by t00t5 2 in Weather

on the basis of their electron configurations predict the formula of the simple binary ionic compound likely to form when the following pairs of elements react with each other.

a. Ca and O
b. Sr and F
c. Al and S
d. Rb and N
e. Na and Te

2006-11-28 09:36:21 · 1 answers · asked by Ballerina 1 in Chemistry

2006-11-28 09:33:25 · 4 answers · asked by Anonymous in Chemistry

I need to know!

2006-11-28 09:32:27 · 11 answers · asked by Katie 1 in Other - Science

how can you create 5 triangles with the letter H and 2 lines.Important thing is that the triangles must be interdependent.I mean it is not allowed two have inside a triangle another triangle.

2006-11-28 09:31:47 · 3 answers · asked by Anonymous in Mathematics

i know fructose and glocouse

Are there any others?

2006-11-28 09:31:10 · 3 answers · asked by boicrazycutie 2 in Chemistry

WRITE A BALANCED EQUATION FOR THE COMPLETE COMBUSTION OF:

a) ETHANE
b) CYCLOHEXANE
c) PENTANE


WRITE A BALANCED EQUATION FOR EACH OF THE FOLLOWING:

a) CH2=CH-CH2-CH3+HCl --->

b) CH3-C=CH2+HBr
I
CH3

2006-11-28 09:28:04 · 1 answers · asked by ? 3 in Chemistry

2006-11-28 09:26:10 · 14 answers · asked by Maria C 1 in Mathematics

2006-11-28 09:26:08 · 3 answers · asked by cheerleadurr1104 1 in Mathematics

If 4/5 + (3/10) = x +1/2, then x=?
this is objective qusetion and i can not find the ans. i try my best to sovle it

2006-11-28 09:25:37 · 5 answers · asked by Anonymous in Mathematics

2006-11-28 09:24:58 · 7 answers · asked by alex 2 in Astronomy & Space

every once and i while i will see a sqrt sign or an integral, expotent, subscript and such. How did people type these into the forum?

2006-11-28 09:24:51 · 3 answers · asked by xian gaon 2 in Mathematics

2006-11-28 09:24:45 · 4 answers · asked by Anonymous in Geography

2006-11-28 09:22:46 · 2 answers · asked by lostprophetslove 1 in Physics

In gas fired hot water heaters a drip-hiss, drip-hiss, ... noise can often be noticed when the burner first ignites. Why does this occur?

2006-11-28 09:22:37 · 2 answers · asked by Steven I 1 in Chemistry