Science & Mathematics - 6 October 2006

If the geological history of the earth was different from how it is, i.e. we never had Pangea; more sea/less land, different geological set-up ;or any other combinations would life, as we know it today be recognisable to us as humans? Would humans even exist? Say, for argument that all the major extinctions occurred at the same point in time etc.

thankyou

2006-10-06 03:23:59 · 4 answers · asked by prof. Jack 3 in Earth Sciences & Geology

The unexplained phenomena in X-files are pretty interesting. Just arouses ones curiosity.

2006-10-06 03:23:56 · 3 answers · asked by heshan_g 2 in Other - Science

2006-10-06 03:23:56 · 5 answers · asked by red_planet47 1 in Engineering

2006-10-06 03:19:29 · 14 answers · asked by Anonymous in Mathematics

2006-10-06 03:18:44 · 4 answers · asked by Anonymous in Earth Sciences & Geology

water is added to 4.267 grams of UF6. the only products are 3.73 grams of a solid containing only uranium, oxygen and flourine and .970 of a gas. The gas is 95% flourine and the remainder is hydrogen.


a. what is the empirical formula of the gas?
b. what fraction of the flouriine of the original compound is in the solid and what fraction in the gas after the reaction?
c. what is the formula of the solid product?
d. write a balenced equation for the reaction between UF6 and H20 , assume that the empirical formula of he gas is the true fromula.

2006-10-06 03:18:02 · 4 answers · asked by Sasha 2 in Chemistry

2006-10-06 03:16:29 · 4 answers · asked by the_guy_with_the_thing 2 in Physics

2006-10-06 03:16:22 · 10 answers · asked by Julianne M 1 in Chemistry

The seasons are reversed in the southern hemisphere from the northern - most of the world's population live in the north, so it's easier to quote that henisphere and simply reverse it if you live in the south.

I've seen this question answered wrongly twice on Yahoo!

Everyone, and I mean everyone, wrongly thinks that the 'Equinox' points of the solar year are the start of either Autumn or Spring when in fact they are the MID points of those seasons!

Shakespeare's 'A midsummer night's dream' is performed on the 21st June i.e. the summer solstice. Shakey has correctly noted it as a MIDsummer night's dream - the start of summer is easily calculated: 52 weeks in the year, four seasons means that's 13 weeks per season, start of all seasons is therefore six and a half weeks BEFORE the Equinox or Solstice. So the correct answer is the 6th of August (give or take a day or two).

I find it astounding how many people swallow what they hear and parrot it as 'known' gospel. Get it right!

2006-10-06 03:14:05 · 11 answers · asked by Rangumai 1 in Astronomy & Space

2006-10-06 03:13:43 · 6 answers · asked by Jen 1 in Chemistry

If they exist what are their side effects?

2006-10-06 03:13:24 · 10 answers · asked by joche1986 1 in Medicine

It is my opinion that the Electrons in a Thunder Cloud are sucked out of the cloud into the Whirling Wind and becomes a Giant Magnet that allows the tornado to be attracted to any metal. I.E. trucks, trains, Mobil Homes that have tons of steel as their supporting base.

2006-10-06 03:13:22 · 7 answers · asked by Jerster 1 in Weather

In a Classification 1, Division 2 area, can batteries be installed and operated, or do they need to be issolated? I can't find anything about it in the NEC. I assume they are ok, since they do create a Class 1, Div 2 area under the right circumstances.

By the way, the system voltage is 12V so there is not a large potential.

2006-10-06 03:11:15 · 3 answers · asked by tightlies 3 in Engineering

2006-10-06 03:10:56 · 11 answers · asked by dutch 2 in Astronomy & Space

2006-10-06 03:08:38 · 3 answers · asked by Jen 1 in Chemistry

2006-10-06 03:06:47 · 8 answers · asked by Nightmare 1 in Biology

We are learning how to name binary and polyatomic ions (the scientific way) and Im having a HARD time figuring this out. All the "ous" "ic" "ide" "ite" "ate" "hydra" "hydro" all that crap. Anyone have a pretty easy way to remember how to do this and can explain it to me simply. Please let me know. Also Please leave your email address so I can ask more questions to the person who answers best... if you dont mind. Thanks

2006-10-06 03:02:02 · 4 answers · asked by Angel Eve 6 in Chemistry

What is the physical law or property that limits the speed of light to 186,282.397 miles per second in a vacuum? Why can't it go faster? I'm aware of things like Group Velocity and Einstein's velocity addition formula, but those things don't explain the phyiscal limiting property. Does it have to do with the way energy works on the quantum level?

2006-10-06 03:01:14 · 6 answers · asked by Trek Lover 2 in Physics

2006-10-06 02:59:30 · 4 answers · asked by Jen 1 in Chemistry

Atterberg Limit
Classification through the Degree of the Expansion of the clay soil which based on Plasticity Index

Plasticity Index (PI) = LL - PL

2006-10-06 02:57:48 · 1 answers · asked by Jon L 1 in Engineering

from rest to a speed of v, doing 5027 J of work in the process. During this time, the car moves 28.1 m. Ignore friction between the car and the road.

Find the speed v. answer in m/s

Find the horizontal force exerted on the car. answer in N

2006-10-06 02:56:29 · 1 answers · asked by Dee 4 in Physics

2006-10-06 02:56:18 · 7 answers · asked by Michelle 6 in Astronomy & Space

Ok, further to my last question, here's the next one...

How much has the amount of CO2 in the atmosphere increased over the last 100 years?

I would like to get a feel for what the average person (who doesn't already know the true figures) thinks the increase in CO2 in the atmosphere is.

Let us assume for simplicity that there were 100 "units" of CO2 100 years ago. How many are there today? So if you think it's still the same, you would say 100. If you think it's increased by 1% you'd say 101. 10% = 110, if you think it's inceased 10 times, you'd say 1000, etc.

So, what do you think?

Please, please, please, if you know the answer, or have looked it up, don't post the true figure here.

2006-10-06 02:54:58 · 23 answers · asked by amancalledchuda 4 in Earth Sciences & Geology

2006-10-06 02:48:06 · 9 answers · asked by smile 3 in Mathematics

2006-10-06 02:46:34 · 12 answers · asked by TS 1 in Mathematics

2006-10-06 02:43:35 · 6 answers · asked by hdswater 1 in Chemistry

In the context of the news article below about NASA and a sky survey that they believe has identified all of the galaxies in about 400 million lightyears from us that have super-massive black holes in their center, how would some of these be inactive? Supposedly our own galaxy has an inactive blackhole. First, I know the idea of inactivity because all of the matter in the local space has been sucked out already, but we are talking galactic centers, the gravitational pivot on which the pinwheel (in our case) spins. So, how would something that is at the center of all that action, stars packed closer than icebergs on the north Atlantic, be inactive?
http://news.yahoo.com/s/space/20061005/sc_space/nasacompletessurveyofnearbysupermassiveblackholes

2006-10-06 02:43:16 · 6 answers · asked by Rabbit 7 in Astronomy & Space

2006-10-06 02:40:10 · 2 answers · asked by Tarshall J 1 in Biology

A bit of scientific whimsy here, since I know the cost would be prohibitive, but theoretically, would it be safe to throw a giant canister containing all of the world's radioactive waste from nuclear power plants into the sun? Or would it cause a flare that could incinerate our planet? What about the safety of throwing nuclear waste into a black hole?

2006-10-06 02:39:31 · 5 answers · asked by mistersato 5 in Astronomy & Space

2006-10-06 02:36:23 · 6 answers · asked by Anonymous in Engineering