Science & Mathematics - 17 January 2007

We all know that Jan 1 (Gregorian) is New Years Day, but how was it determined which day of the earth's cycle would be Jan 1st? Why did they not choose the Winter Solstice which is 8 or 9 days earlier? Who made the determination of which day would be the first day of the year?

2007-01-17 05:27:30 · 3 answers · asked by Jim S 1 in Astronomy & Space

2007-01-17 05:27:29 · 11 answers · asked by knightrider1uk 1 in Chemistry

a.Convergent evolution
b.adaotive radiation
c.speciation
d.artificial collection

In an energy pyramid of trophic levels, the animals that are farthest from the producer means they what?
a.Have the least biomass
b.have the most biomass
c.recieve the most energy
d.are the largest in numbers

Bacteria that live on the roots of peanuts plants and legumes do what?
a.Change free nitrogen into proteins for plants
b.Break down nitrogen compounds into expensive nitrogen
c.Break down nitrogen compounds into free nitrogen
d.Change free nitrogen into nitrogen compounds

Thanks. Will give good points.

2007-01-17 05:27:28 · 5 answers · asked by georgia_gurl345 2 in Biology

2007-01-17 05:26:58 · 4 answers · asked by cshirl07 1 in Chemistry

I have always wondered what would happen if the Hoover Dam failed or was destroyed. In this day and age of terrorism it is now a concern more than ever.

1. How much water would flood out and how far would the flood go?

2. What areas would be effected from the flooding?

3. How long would it take for the water to reach a point where it didn't pose a threat?

What would that do to the power in Arizona and Nevada and the water supplies to those States?

Thanks

2007-01-17 05:25:45 · 2 answers · asked by scottanthonydavis 4 in Geography

x 3 - y 3 + z

2007-01-17 05:25:24 · 3 answers · asked by Anonymous in Mathematics

x 3 y 3 z

2007-01-17 05:25:03 · 3 answers · asked by Anonymous in Mathematics

OK, if someone is using the pill, which is 99% effective, while also using spermicide, which is 94% effective, what is the total effectiveness of BOTH of the methods combined. And, for extra credit, why the heck haven't I had my period yet?

2007-01-17 05:24:31 · 2 answers · asked by True Dat 4 in Mathematics

size, shape, composition, atmosphere, density, distance from the sun, surface, and moons

2007-01-17 05:24:27 · 2 answers · asked by lend322 4 in Astronomy & Space

where do i find them?

2007-01-17 05:23:40 · 6 answers · asked by Anonymous in Other - Alternative

x 3 y 3

2007-01-17 05:23:19 · 2 answers · asked by kay 1 in Mathematics

let me know when i do or did something right

2007-01-17 05:22:54 · 3 answers · asked by Anonymous in Astronomy & Space

I just took this picture ten minutes ago: http://img118.imageshack.us/img118/8749/spider3lw7.jpg

2007-01-17 05:22:30 · 14 answers · asked by Lucie C 2 in Zoology

2007-01-17 05:22:14 · 25 answers · asked by izzy 1 in Astronomy & Space

How do I solve
y=-3x-2

2007-01-17 05:21:52 · 1 answers · asked by ice_ladyusa 1 in Mathematics

-3 xy 3 + 7 xy 3 + (- xy 3 ) + (-3 xy 3 )

2007-01-17 05:21:17 · 3 answers · asked by texas_diamond_diva 1 in Mathematics

I have been talking to a few people who think it would be "fun" to do so, and I would like to know as to weither or not it is, in fact, possible, and I am NOT asking if it is ethical OR smart, I just want to know if it is possible.

2007-01-17 05:20:48 · 21 answers · asked by damien m 1 in Paranormal Phenomena

The carbon cycle is an example of a(n)
A atmospheric cycle.
B biospheric cycle.
C biogeochemical cycle.
D geochemical cycle.

2007-01-17 05:20:36 · 7 answers · asked by cassy w 1 in Earth Sciences & Geology

4 n 5 + 3.5 n 5 + (-2.1 n 5 )

2007-01-17 05:20:10 · 2 answers · asked by texas_diamond_diva 1 in Mathematics

a.Cytochrome C
b.Melanin
c.DNA
d.ATP

An organism that does not have a true nucleus nor membrane bound organelles is called what?
a.Eukaryotic
b.Prokaryotic
c.Fungi
d.Protists

Thanks.

2007-01-17 05:17:53 · 7 answers · asked by georgia_gurl345 2 in Biology

2007-01-17 05:17:13 · 1 answers · asked by Anonymous in Biology

How does this happen? Do you have a theory? Read link
http://news.yahoo.com/s/ap/20070117/ap_on_re_us/pregnant_chimp

2007-01-17 05:15:55 · 7 answers · asked by Laughing Man Copycat 5 in Zoology

When i look at the world i see tiny dots 'buzzing'.Similar to the tv screen when there are no programs on.I can still see everyone and everything but it gives me a sense of two dimensional rather than three.Can anyone explain this please?

2007-01-17 05:15:22 · 6 answers · asked by Anonymous in Physics

its description, cultivation, varities, uses

2007-01-17 05:15:06 · 3 answers · asked by Anonymous in Botany

2007-01-17 05:14:57 · 8 answers · asked by Kripster 1 in Zoology

2007-01-17 05:14:17 · 4 answers · asked by Kripster 1 in Weather

Discuss different ways that people can affect Earth's energy budget.

2007-01-17 05:14:07 · 5 answers · asked by cassy w 1 in Earth Sciences & Geology

Do they mean the wind is blowing from the south, or towards the south?

2007-01-17 05:13:19 · 6 answers · asked by Kripster 1 in Weather

A.The sun will go supernova
B.The sun will consume itself
C.The sun will turn into a red giant
D.The sun will callapse and turn into a black hole

2007-01-17 05:12:35 · 9 answers · asked by Prince_Krona 2 in Astronomy & Space

2007-01-17 05:12:03 · 11 answers · asked by aprayingmanthis 1 in Biology