English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

Science & Mathematics - 19 November 2007

[Selected]: All categories Science & Mathematics

Agriculture · Alternative · Astronomy & Space · Biology · Botany · Chemistry · Earth Sciences & Geology · Engineering · Geography · Mathematics · Medicine · Other - Science · Physics · Weather · Zoology

http://heritage.stsci.edu/2007/30/index.html

I'm totally entranced with this Veil Nebula.... but what forces, solar 'winds', star explosions, etc, whatEVER, would leave dust in such graceful tracings as these?.... do they move as the astronomers take successive pictures of them over the years?.....

2007-11-19 09:26:38 · 7 answers · asked by meanolmaw 7 in Astronomy & Space

2007-11-19 09:26:00 · 20 answers · asked by suzywong 4 in Biology

1. find the molarity of a solution if 148 grams of sodium hydroxide is dissolved in enough water to make 3.8 L of solution?
2. find the number of grams of Magnesium Nitrate in 5.2 L of a 4.4 molar solution of magnesium nitrate.

2007-11-19 09:24:00 · 2 answers · asked by Anonymous in Chemistry

Hi,

In 1940 two chemists named Sidgwick and Powell came up with a theory on the structures of molecules and were the first to introduce the linear, trigonal planar, tetrahedral, trigonal bypyramid, and octahedral geometries. Although they developed the key molecular geometries, their theory was incorrectly stated: "Bonding pairs and lone pairs are of equal importance and distribute themselves to minimize interelectron repulsion." What fundamental modification did Gillespie and Nyholm add to Sidgwick and Powell's theory to develop the VSEPR theory that we use today? Give an example of two different molecules that violate the incorrect statement in the Sidgwic/Powell theory and give evidence as to why they violate the old theory?

Are bonding pairs more important and they try to get as far from one another as possible? It does seem like the bonding pairs and the lone pairs are of equal importance so I don't know what's wrong.

Thanks!

2007-11-19 09:14:21 · 3 answers · asked by Anonymous in Chemistry

2007-11-19 09:12:00 · 2 answers · asked by Anonymous in Physics

I have been doing it by meditating and calling out to ask if anyone is there. I though it wasn't working. Now in the bedroom where I have been doing it is always cold. My partner thinks I have bought a spirit into the house. We have the heating on and the house is warm and there's nothing wrong with the radiator in the bedroom but it doesn't stay warm for long in there. Could I have bought a spirit into the house?
I need advice seriouse answers only.

2007-11-19 09:11:13 · 13 answers · asked by sam 2 in Paranormal Phenomena

I know this is extremely broad. I think I understand that only a medical doctor may do this. But what regulations do hospitals generally have? Are given "diagnoses" generally written on paper with clear guidelines or is the experience and knowledge of the medical doctor the most important (determining factor)?

I'm sorry this question is so broad. I mean, scientific discoveries are being made all the time. How does the medical doctor integrate these advances in the clinical work? .. or is this a decisions made by others?

2007-11-19 09:08:29 · 4 answers · asked by ? 3 in Medicine

My marine biology class watched a national geographic video on whaling. It was shown that SONAR could kill whales, causing tumors in the brain and other things of that nature. I missed the second day of watching the video where it said the methods used to determine the effects. I know they performed autopsies, however I do not know what tool they used. Anyone know?

2007-11-19 09:06:20 · 2 answers · asked by Aly 3 in Zoology

what reasons?????????

2007-11-19 09:05:46 · 9 answers · asked by Anonymous in Other - Science

I was wondering how you could use the half life method to prove a reaction was first order?

2007-11-19 09:05:28 · 1 answers · asked by Anonymous in Chemistry

2007-11-19 09:05:19 · 7 answers · asked by Anonymous in Astronomy & Space

8. An executive at Westinghouse drives from his home in the
suburbs near Pittsburgh to his office in the center of
the city. The driving times are normally distributed
with a mean of 35 minutes and a standard deviation of 8
minutes.

a. In what percent of the days will it take him less
than 30 minutes to drive to work?
b. In what percent of the days will it take more than
40 minutes to drive to work?
c. Some days there will be accidents, etc., so the
trip will take longer than usual. How long will the
longest 10 percent of the trips take?

2007-11-19 09:00:36 · 1 answers · asked by Patricia F 1 in Mathematics

I really suck at physics, can someone help me?

You ski down a frictionless icy hill that has a slope of 30 degrees above horizontal. What is the magnitude of your acccceleration down hill?

Can someone please explain?

2007-11-19 09:00:08 · 1 answers · asked by The Problem Solver 3 in Physics

I think I have an idea about a way to produce electricity based on physics, which is 100% renewable, reliable and eco-friendly. Does anyone know where I can get my idea heard? Or where I can ask a question on a more specialised website to see if it is realistic?

2007-11-19 08:56:19 · 5 answers · asked by BoB C 1 in Physics

2007-11-19 08:52:39 · 7 answers · asked by Anonymous in Mathematics

how is this Bromine
n=4
l = 1
ml = 0
ms = -1/2

from this, i know that its in the 4th energy level and since l = 1, it must be in the 4p orbital. but i dont understand ml. how do i determine which element it is from the 4p orbital???

2007-11-19 08:51:14 · 1 answers · asked by Anonymous in Chemistry

i mean u put water on paper nd it goes soggy put it on wood it just goes away but it on metal nuffin!.
same wiv fire. paper burns but thjeres sum stuff that dont!! explain plz

2007-11-19 08:48:37 · 4 answers · asked by Mr_Anomynous 2 in Physics

i have an interview coming up this week . It's an entry level electrical engineering interivew,
what kind of operational amp questions do you think I should expect ? I am kind of nervous , if they are gona ask me any question that i am not sure of I will start to panic. but if i have any idea of the kind of question ( relating to op amp ) then i think I will be fine.
What do you think ?

2007-11-19 08:47:54 · 5 answers · asked by Anonymous in Engineering

there is here in montana.

2007-11-19 08:46:51 · 18 answers · asked by Anonymous in Weather

2007-11-19 08:46:29 · 2 answers · asked by Anonymous in Physics

A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her angular velocity from 3.00 to 4.15 rev/s while rotating through one-third of a revolution. How much time does this maneuver take?

2007-11-19 08:46:10 · 1 answers · asked by jdcowboy2500 1 in Physics

lol

2007-11-19 08:44:19 · 7 answers · asked by forest lover 2 in Astronomy & Space

I cant figure out how to do these problems in my homework.

Convert each number from decimal form to the given base.

1. 86 to base five

2.19 to base two

3. 147 to base sixteen

4. 12888 to base 8

any help would be greatly appriciated

2007-11-19 08:44:19 · 3 answers · asked by Jay J 2 in Mathematics

Our Universe

2007-11-19 08:44:13 · 5 answers · asked by HiramRajKamal 4 in Astronomy & Space

It has to do with my 5th graders math

2007-11-19 08:43:14 · 3 answers · asked by Donna 1 in Mathematics

Homework help please!!!

2007-11-19 08:38:19 · 2 answers · asked by â?º NaTuReâ?º 2 in Mathematics

Ya How do u make and Oblique Cirlcle in AutoCad 2008

2007-11-19 08:37:59 · 2 answers · asked by Anonymous in Engineering

2007-11-19 08:35:22 · 5 answers · asked by BRIAN G 1 in Engineering

how do i work out what 7- 4/3) is ??

2007-11-19 08:32:50 · 6 answers · asked by Anonymous in Mathematics

fedest.com, questions and answers