Science & Mathematics - 6 July 2007

I am doing tensile test for several materials, but I found that modulus of resilience doesn't have any unit, at least not on the internet. Anyone know what's the unit for this ? Providing it is calculated by half of the product of stress and strain.

2007-07-06 17:23:01 · 6 answers · asked by GHOST_301 1 in Engineering

Compared to Cl− or Br−, in the 2-butanol reaction,

a. H2O is a relatively good nucleophile, because it had to be avoided during the workup procedure.
b. H2O is a relatively poor nucleophile, because no or very little alcohol is observed in the GC.
c. H2O is a relatively poor nucleophile, because it carries no negative charge.
d. H2O is a relatively good nucleophile, because the yield of halides was low due to back-reaction with water.

2007-07-06 17:19:22 · 1 answers · asked by Anonymous in Chemistry

2007-07-06 17:15:34 · 3 answers · asked by cerealmonster101 1 in Medicine

2007-07-06 17:15:12 · 8 answers · asked by Anonymous in Astronomy & Space

2007-07-06 17:08:48 · 3 answers · asked by rye 1 in Engineering

2007-07-06 17:06:32 · 6 answers · asked by Pansy 4 in Medicine

Anyone out there that is in this field? What do you do? Do you like it? How did you get into it?

2007-07-06 17:05:38 · 2 answers · asked by Anonymous in Engineering

I have recently moved from Alaska, been in Northwest Washington for only just over a year. I have noticed many Monarch butterflies (in the past couple weeks) and my sister (a 14 year resident) says this is highly unusual. I have tried surfing the net to find out if they prefer warm climate but am unable to find anything, so it seems easier to ask you guys. Are Monarchs more prone to warm weather? Are they more prevelant here due to global warming? Being from Alaska I have already seen the effects of warmer air, ground and water. And although the Monarchs are beautiful, them coming to Nothwest Washington-is that not a good sign?

2007-07-06 17:04:11 · 7 answers · asked by Anonymous in Weather

plzz answer

2007-07-06 16:59:49 · 2 answers · asked by kathy w 2 in Earth Sciences & Geology

In my stats class, we're looking at estimates, internal estimations of population mean, confidence interval, etc. I'd like to find a real life example on the net that will show how estimates can be unreliable. Any thoughts?

2007-07-06 16:57:28 · 2 answers · asked by Anonymous in Mathematics

in the experiment we performed, tiosulfate and HCl, when i was computing for the the order of reaction of HCl, one of our data gave a negative order of reaction with respect to H+...
is it possible or just an error in the datum?

2007-07-06 16:54:48 · 3 answers · asked by melvin m 2 in Chemistry

Which is better a kendrick baader solar filter or a thousand oaks filter? Which one is more safe in your opinion, which one has better optical quality?

2007-07-06 16:53:52 · 3 answers · asked by ? 3 in Astronomy & Space

Source: People on night line telling lies about observing life from other planets/space. Are they embarrassed? Why do they say that?

2007-07-06 16:51:10 · 11 answers · asked by Anonymous in Astronomy & Space

2007-07-06 16:41:54 · 6 answers · asked by hartzrbreakin 2 in Biology

2007-07-06 16:39:08 · 6 answers · asked by Anonymous in Biology

The most no-nonsense definition I've ever found is dS = δQ / T, which to me could as well translate to сяскыйкийуз!

2007-07-06 16:33:53 · 7 answers · asked by Fernando 1 in Physics

uuuuuuuuuuuuh PLEASE I CAN'T FIGURE THIS QUESTION OUT!!!! I DON'T KNOW HOW TO SCREW A LIGHT BULB IN!?!

2007-07-06 16:32:26 · 5 answers · asked by Anonymous in Engineering

Differentiate the allopatric, parapatric and sympatric.

2007-07-06 16:27:55 · 3 answers · asked by Dude 1 in Biology

i wondered that the other day will there come a day when we go alright there is nothing else, or even will we survive that long?

2007-07-06 16:25:59 · 19 answers · asked by adam s 2 in Astronomy & Space

it has to do with the projection of the future

2007-07-06 16:24:33 · 1 answers · asked by Anonymous in Astronomy & Space

Do any one know if astronomers have discovered any non circular planets ? Why couldn't a planet be some odd shape ??

2007-07-06 16:18:52 · 11 answers · asked by gemini6187 2 in Astronomy & Space

.......in as much detail as u can

thnx

2007-07-06 16:17:16 · 8 answers · asked by RaZoR 2 in Physics

My friend and I are going to launch a live mouse about 1500 feet into the air using a model rocket. Mouse will be strapped into a parachute and will not be injured. Looking for help on anestisizing mouse for pre launch setup. Any other suggestions appreciated.

2007-07-06 16:13:28 · 9 answers · asked by Michael D 2 in Astronomy & Space

if u place some water in a tray and turn on the sound of a speaker nearby,the water will start vibrating.

BUT if u replace the speakers with a torch light and flash it on the water,it'lll not vibrate........WHY?? both,light and sound,are waves.

if you're just gonna answer tht light acts a particle as well as wave,thn thnx alot! u can move on to another question without answering.
I need some xplanation on it

thnx a bajillion:)

2007-07-06 16:12:25 · 7 answers · asked by RaZoR 2 in Physics

how did earth get created where did the animals come from how was food and water made where does wind, fire,floods,tornadoes, earth quacks,storms. how where colors created brown ellow blue green black and white what came first the chicken or the egg does anyone have any idea

2007-07-06 16:09:30 · 9 answers · asked by Anonymous in Earth Sciences & Geology

i think one of them are the eyipiton pyrimides

2007-07-06 16:08:30 · 3 answers · asked by Milly 2 in Earth Sciences & Geology

I never seen trees like this. Growing near Fort Worth, Texas. They grown exceptionally fast and multiply quickly by sending out new trees by their roots. They have broad leaves that seem fuzzy, smooth bark that is slightly fuzzy feeling. No flowers, no seeds that I can find. They lose their leaves in the winter. Their wood is soft and the tree is easy to cut down, but they grow right back and quickly take over because of their huge root system that is shallow. Roots have a yellowish color. They can grow very tall (quickly). They are pretty trees and overwhelm a field quickly. I think they like moist areas. I grew up here and have never seen these before we bought this new place and I can't find them in any books. Does anyone know?

2007-07-06 16:04:10 · 3 answers · asked by seemore 3 in Botany

ok i have no idea what this means. YES its for school. but theres no context.

2007-07-06 16:03:58 · 3 answers · asked by imputh 5 in Biology

2007-07-06 15:59:57 · 8 answers · asked by 1fast97 1 in Geography

2007-07-06 15:55:19 · 6 answers · asked by Aidan M 1 in Physics