Science & Mathematics - 4 October 2006

Recently, the giant impact hypothesis has been considered a more viable scientific hypothesis for the moon's origin than the coformation or condensation hypothesis. The Giant Impact hypothesis holds that the Moon formed from the ejecta resulting from a collision between a very early, semi-molten Earth and a planet-like object the size of Mars, which has been referred to as Theia or Orpheus. The material ejected from this impact would have gathered in orbit around Earth and formed the Moon. This hypothesis is bolstered by two main observations: First, the composition of the Moon resembles that of Earth's crust, though it has relatively few heavy elements that would have been present if it formed by itself out of the same material from which Earth formed. Second, through radiometric dating, it has been determined that the Moon's crust formed between 20 and 30 million years after that of Earth, despite its smallness and associated larger loss of internal heat, although it has been suggested that this hypothesis does not adequately address the abundance of volatile elements in the moon.

2006-10-04 10:31:45 · 3 answers · asked by Anonymous in Astronomy & Space

i need answers asap.....pls.....

2006-10-04 10:30:52 · 8 answers · asked by Rune 1 in Chemistry

and would it be easier to blame someone else?

2006-10-04 10:28:29 · 13 answers · asked by KU 4 in Physics

Otzi the iceman is the oldest icemummy ever found. I'm doing a project on him... and I need some help.

2006-10-04 10:27:12 · 6 answers · asked by jenny g! 1 in Earth Sciences & Geology

i am not good at math so i am undering where i should go that is free

2006-10-04 10:26:04 · 6 answers · asked by BUNNY 2 in Mathematics

A list of five minerals and at least two physical properties that can be used to identify the mineral?

2006-10-04 10:24:38 · 7 answers · asked by bettcheese 2 in Earth Sciences & Geology

Reaction is P4+6I2---> 4PI3

It says what mass of P4 is needed to produce 52.6 g of PI3if the reaction has an 86% yield?

what does the % yield mean for this? is the 52.6 g 86 % and i have to solve this using the 100% yield, or is the 52.6 g 100% yield and i have to solve this problem using 86% of it?
im confused.
someone plz help!

2006-10-04 10:24:06 · 4 answers · asked by Anonymous in Chemistry

2006-10-04 10:22:40 · 7 answers · asked by bettcheese 2 in Earth Sciences & Geology

2006-10-04 10:22:18 · 3 answers · asked by Dude J 1 in Chemistry

1. S is a nonempty subset of R that is bounded from above but has no greatest element (max). prove supS is a cluster point of S

2. Prove that a subset of a metric space is closed iff it contains all its cluster points.

2006-10-04 10:21:38 · 1 answers · asked by KYP 1 in Mathematics

Besides oak and ivy, black widow, brown recluse, and eastern diamond back rattlesnakes, what else is poisonous in NY or the region?

2006-10-04 10:21:24 · 4 answers · asked by Anonymous in Biology

This has to do with science and my science test is tomorrow! Oops! lol

2006-10-04 10:20:11 · 3 answers · asked by yowezz20 1 in Physics

2006-10-04 10:19:11 · 2 answers · asked by Amy 1 in Chemistry

One question is "What happens when phenolphthalein solution is mixed with hcl solution". I don't just want the answer to this, but can anyone tell me how I'd go about finding out the answer please?

2006-10-04 10:18:52 · 2 answers · asked by Anonymous in Chemistry

2006-10-04 10:17:33 · 7 answers · asked by Amy 1 in Chemistry

i've tryed to pass it for the last two years......


DO YOU KNOW ANY HELPFUL MATH WEBSITES?

2006-10-04 10:15:08 · 4 answers · asked by .:.:.Mizz_undaStood.:.:. 4 in Mathematics

doing biology essay and am having trouble finding the info. have found the diabetes problem with how the membrane has a prob with the protein carriers but can't find another example- please help!

2006-10-04 10:13:00 · 6 answers · asked by Anonymous in Biology

2006-10-04 10:11:42 · 7 answers · asked by rebelrebar 1 in Mathematics

If there are any environmental engineers on here....
What is your career all about?
Do you enjoy it?
Was University/College difficult?
Have you had much success (i.e. finding employment, making money)?
Is it what you expected?

Just curious as I am trying to decide what I would like to do with my life and this is one of my possible choices. Thanks!

2006-10-04 10:10:28 · 4 answers · asked by Anonymous in Engineering

how do you find the limit of the function below as x goes to infinity

e^(2x)/ sinh(2x)

2006-10-04 10:10:25 · 1 answers · asked by ? 1 in Mathematics

2006-10-04 10:09:01 · 21 answers · asked by simongunning2001 1 in Physics

2006-10-04 10:06:47 · 2 answers · asked by jennifer 1 in Earth Sciences & Geology

this is for my test tomorrow i forgot how bg an average star is.

2006-10-04 10:06:10 · 5 answers · asked by demonjathan 1 in Astronomy & Space

2006-10-04 10:05:24 · 6 answers · asked by aj mc cake 1 in Mathematics

2006-10-04 09:59:17 · 8 answers · asked by pumpmar 2 in Zoology

{y is greater than or equal to x +2
3y< -6x+6
(sorry i dont know how to do the inquality sign

2006-10-04 09:58:49 · 3 answers · asked by damaris s 1 in Mathematics

2006-10-04 09:57:46 · 0 answers · asked by DALE EARNHARDT JR's BIGGEST 1 in Other - Science

What dashboard displays would be needed to measure the average velocity of a car over an extended period of time? How would the calculations be made?

2006-10-04 09:56:56 · 1 answers · asked by Anonymous in Physics

I was doing yard work and thought I saw a leaf stuck in a web when I went to move it IT moved. I was wondering if there is a certain site I can go to and describe it or look thru pictures. The legs andbody look purplish blue, the back looks like the back of a crab (two pointy things on each side, and two pointy things on the very back) the back acctually looks like a leaf is stuck to it but the colors are differant than any I've ever seen. If you look at the spider upside down it also looks like a white cats face. Any ideas?

2006-10-04 09:56:49 · 5 answers · asked by code7895 2 in Zoology

mr. burton went to the hardware store. "how much are these" he asked the clerk "$0.25 ea." came the reply "Okay i'll take 100"
he paid only $0.75. what did he buy?

2006-10-04 09:55:11 · 5 answers · asked by Anonymous in Mathematics