Science & Mathematics - 30 October 2007

I understand that we've done some amazing things in space, but it seems that we are blowing a ton of cash on day-to-day expenses that could be better used elsewhere. Aside from satellites and the Mars landers, what are we gaining by sending missions up all the time? I hear many arguments about the advances that Nasa has brought us, like Velcro for example. Your telling me they needed to be up in space to invent this stuff? No. FUNDING is what brought us these advances NOT being in orbit. Just once I'd like to hear about a mission that ends with a breakthrough, but it never does. Yet every time we go to the ocean floor we discover a new creature! It's time to sort out all of Earth's problems and mysteries before we set our sights on leaving it. Because right now all I think of when I hear about a shuttle launch is "Gee, I hope it doesn't blow up" I wish I could think "Yay! I wonder what they will do up there!" But no one really thinks like that...

2007-10-30 08:35:44 · 8 answers · asked by _Kraygh_ 5 in Astronomy & Space

what do plants look like in red light
what do they look like in blue light ... green? white? and darkness?
in which lights are they green with chlorophyll and can perform photosynthesis?!?!

2007-10-30 08:35:34 · 3 answers · asked by M 3 in Biology

any guess?

2007-10-30 08:32:29 · 6 answers · asked by Anonymous in Astronomy & Space

2007-10-30 08:32:25 · 4 answers · asked by Anonymous in Mathematics

The determined Wile E. Coyote is out once more to try to capture the elusive Road Runner. The coyote wears a new pair of Acme power roller skates, which provide a constant acceleration of 15 m/s^2. The coyote starts off at rest 70 m from the edge of a cliff at the instant the road runner zips by in the direction of the cliff.

a.) If the Road Runner moves constant, find the minimum speed the roadrunner must have in order to reach the cliff before the coyote.

b.) If the cliff is 100 m above the base of a canyon, find where the coyote lands in the canyon. (Assume that his skates are still in operation when he is in flight and that his horizontal component of acceleration remains constant at 15 m/s^2).



thx people

2007-10-30 08:31:57 · 1 answers · asked by acousticplaya90 1 in Physics

Psychics, what can you tell me about yourselves? How do you use the phenomena which some people call "psychic" (an absurdley open ended, indistinct, and all inclusive term, in my opinion), and what exactly constitutes being psychic?

2007-10-30 08:30:37 · 7 answers · asked by ian_eadgbe 3 in Other - Alternative

i always wondered this. especially under water, how are they affected? and with seals and sea lions....where do they go to get away from the hurricane?

2007-10-30 08:30:18 · 4 answers · asked by sunny 3 in Zoology

2007-10-30 08:23:37 · 2 answers · asked by Anonymous in Earth Sciences & Geology

As a logging truck rounds a bend in the road, some logs come loose and begin to roll without slipping down the mountainside. The mountain slopes upward at 48.0 degrees above the horizontal, and we can model the logs as solid uniform cylinders of mass 525 kg and diameter 1.20 m.

Find the acceleration of the logs as they roll down the mountain.

What is the friction force on the rolling logs?

2007-10-30 08:23:24 · 1 answers · asked by ! 2 in Physics

2007-10-30 08:22:11 · 5 answers · asked by network 2 in Zoology

math problem

2007-10-30 08:21:45 · 10 answers · asked by Receepc 1 in Mathematics

On Nov. 20, 1977, Kenneth peter Warby attained a speed of 345.48 miles per hour in his unlimited hydroplane “Spirit of Australia”. How fast was this in meter per second?
(1 mile = 1.6093 km)

2007-10-30 08:18:37 · 3 answers · asked by Rachel B 1 in Mathematics

2007-10-30 08:15:33 · 4 answers · asked by Joanne M 1 in Biology

Science Homework, I'm stuck!!!! due friday

2007-10-30 08:12:48 · 7 answers · asked by Anonymous in Astronomy & Space

Explain why the simple placement of a hydroxyl group in the building blocks of a polysaccharide can determine the digestibility of polysaccharides.

2007-10-30 08:07:50 · 1 answers · asked by Anonymous in Chemistry

2007-10-30 08:07:49 · 2 answers · asked by shameem s 1 in Engineering

if x1,x2,x3 generate a vector space V then the vectors x1,x1+x2,x1+x2+x2 also generate V, how do you prove this? appreciate your help.

i need to show that every vector in V is a linear combination of the vectors xi

2007-10-30 08:04:38 · 2 answers · asked by Anonymous in Mathematics

2007-10-30 08:03:29 · 6 answers · asked by Anonymous in Mathematics

2007-10-30 08:00:11 · 4 answers · asked by network 2 in Geography

2007-10-30 07:59:13 · 3 answers · asked by Amber H 1 in Chemistry

And what do u think they'll be capable of doing? Will women become obsolete?

2007-10-30 07:58:59 · 5 answers · asked by Anonymous in Astronomy & Space

I can imagine McDonalds being interested in Pork wings and it would save a fortune in transport costs especially if you could make homing pigs that fly to the Abatoir on their own.

2007-10-30 07:58:16 · 30 answers · asked by Anonymous in Biology

A car rounds a banked curve where the radius of curvature of the road is R, the banking angle is , and the coefficient of static friction is µ.
(a) Determine the range of speeds the car can have without slipping up or down the road. (Use mu for µ, theta for , and R and g as appropriate in your equations.)
minimum speed ----m/s
maximum speed ----m/s

(b) What is the range of speeds possible if R = 150 m, = 10°, and µ = 0.13 (slippery conditions)?
minimum speed ----m/s
maximum speed ---- m/s

2007-10-30 07:57:33 · 1 answers · asked by roxy_799 1 in Physics

2007-10-30 07:56:57 · 3 answers · asked by Jansen J 4 in Astronomy & Space

I know the days are different. Cow 18-24 and ewe is 14-19.

2007-10-30 07:53:57 · 1 answers · asked by L L 1 in Zoology

or at least hover a bit. I've seen those guys that strap wings to their arms and jump of a pier, but they don't seem to get much speed up on the flapping.

2007-10-30 07:53:51 · 7 answers · asked by Anonymous in Physics

just wondering. I live in NewEngland and everywhere i drive lately all the trees are fading. I know they really arent "green" so why do they look green? and what's happening to the wavelengths of light compared to the red/blue wavelengths?

2007-10-30 07:52:16 · 4 answers · asked by Zachary M 1 in Botany

I am in Germany, right now I have 19.50. I want to participate in a live discussion in the Washington Post that starts at 3 p.m. ET. When is that?

2007-10-30 07:51:53 · 5 answers · asked by Yow Joo 6 in Geography

Calculate the density, g/cm3, of propane C3H8 at 107.0C and 868 torr.

I am having trouble with this chemistry problem and if anyone could help me out that would be great. Please don't just give the answer, explain why. Thanks!

2007-10-30 07:51:17 · 1 answers · asked by Anonymous in Chemistry

In cooking over an open flame, a yellow flame is often observed(particularly if one spills some food on the falme). continue with question.

2007-10-30 07:45:01 · 9 answers · asked by preety 3 in Chemistry