We saw episodes theorizing life on earth was "seeded" from space (meteors or such). But for us, that begs the question, how did life originate *there*? Did Nova have an episode (or does anyone know of studies in chemistry or physics) describing *scientific* theories of how life arose, *at all*, *ever*, *anywhere*?

2007-01-15 03:47:44 · 2 answers · asked by fjpoblam 7 in Biology

4 ⤊

Why can you see the sounda barrier when a jet breaks it??

2007-01-15 03:44:22 · 4 answers · asked by Anonymous in Physics

0 ⤊

what is a fjord?

2007-01-15 03:42:06 · 9 answers · asked by alexanderbucephalus 2 in Geography

5 ⤊

Why does a wet dishcloth or sponge soak up more water than a dry one?

2007-01-15 03:40:26 · 8 answers · asked by Anonymous in Other - Science

20 ⤊

Chemistry help?

What is the mass of 7.21 x 1021 molecules of silver acetate? Plez show how to do this, thanx

2007-01-15 03:40:15 · 3 answers · asked by xo winter-angel xo 3 in Chemistry

1 ⤊

Why does Daylight savings time start about 51 days before the winter Solstice but end about 100 days after?

Shouldn't the time before and after be roughly equal? Is the need for DST greater in the winter than in the fall? (No.) It's about hours of daylight, not heat, right?

2007-01-15 03:38:42 · 6 answers · asked by Robert B 1 in Other - Science

1 ⤊

What is the acceleration of a 20-kg block of cement that is pulled upward with a force of 300 N?

2007-01-15 03:37:44 · 4 answers · asked by micropterushunt 2 in Physics

0 ⤊

what is the formula for figuring maximum amps on a given low voltage cable?

2007-01-15 03:37:24 · 3 answers · asked by steven p 1 in Engineering

24 ⤊

How do you make Invisible ink, its for Cub Scouts?

My Webelos are working on their Comminication badge and one of the suggested activities is making invisible ink and I found out you use lemon juice on white paper, let it dry and view at a light bulb, a heat source, but this does not work, any other suggestions on how to make invisible ink and write a message on paper and have it appear at a later time?

2007-01-15 03:35:42 · 6 answers · asked by Tigger lover 2 in Other - Science

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Showing 1021 to 1050 of 1209 questions

Questions asked on other days:

Science & Mathematics - 15 January 2007

What follows Nonet for 10, 11 and 12?

what is 15% of 190,000?

All living things need oxygen right? mammal embryos get it via the umbilical cord. How do egg embryos get it?

is it gonna snow...?

how do you calculate square meter?

why does some snow make a snowball and some snow can?

where does energy originate from when it cannot b created or destroyed?

what is the difference between variety and cultivar?

Why do things float on the dead sea?

what is chemical mass?

How does ice melt in different substences and why??

why we r hr?

explain dwarf varieties in wheat and rice?

2.84 grams of S candium when burned in air yield 4.36 g oxide. What is the emperical formual for this oxide?

does the color of an object affect the object's buoyancy?

How far is the sahara desert from Boston England?

can some one please tell me how to factor this polynomial?: x^5 - 15x^3 - 10x^2 + 60x + 72?

PBS Nova fans: did we miss one?

Why can you see the sounda barrier when a jet breaks it??

what is a fjord?

Why does a wet dishcloth or sponge soak up more water than a dry one?

Chemistry help?

Why does Daylight savings time start about 51 days before the winter Solstice but end about 100 days after?

What is the acceleration of a 20-kg block of cement that is pulled upward with a force of 300 N?

what is the formula for figuring maximum amps on a given low voltage cable?

How do you make Invisible ink, its for Cub Scouts?

If i were looking at a computer model for future weather ...what would 0z mean?

do you think that global warming is happening this winter?

Where is Crimea located?

Where is Crete located?