Science & Mathematics - 17 December 2007

Watching the sky with my mom tonight, she asked me what the bright star next to Mars was. I said there were no other planets in the sky (live in the southeastern US), and as we were looking at it, the "star" just faded out. The sky was completely clear of clouds. It was about 6:40 pm when the sky had gotten pretty much completely dark. Mars was about 10 degrees above the eastern horizon, and this star was about the same distance above the horizon, slightly brighter, and 10-20 degrees to the right of Mars. The object was there for at least 20 seconds or so and stationary.

Afterwards, my mom said she's seen this thing for years in the same spot in the sky from time to time, and it bothers her that she can't explain it. Is this some sort of astronomical phenomenon?

2007-12-17 16:10:08 · 6 answers · asked by Zhuo Zi 3 in Astronomy & Space

2007-12-17 16:08:53 · 3 answers · asked by coolgal 1 in Physics

2007-12-17 16:06:58 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-17 16:03:46 · 2 answers · asked by nadji_feissali 1 in Zoology

it can be

-5
or
5
or
10
or
none of these


thank you!!

2007-12-17 16:02:09 · 11 answers · asked by Jen C 1 in Mathematics

4x^2 – 36y^2

3x^2 – 2x – 8

24x^2 + 10x – 4

2007-12-17 16:00:19 · 6 answers · asked by Abena 2 in Mathematics

Identify the components of carbohydrates and proteins??

2007-12-17 15:58:18 · 4 answers · asked by Anonymous in Biology

Whats your take on it? Don't ask me, I haven't got one.

2007-12-17 15:54:17 · 16 answers · asked by Anonymous in Other - Science

how does your sense of smell work? is it when small particles of something dissolve in a part of your nose?

2007-12-17 15:54:13 · 15 answers · asked by ? 2 in Biology

What are the squids fins used for?

2007-12-17 15:50:59 · 5 answers · asked by Anonymous in Zoology

A)
the function F is defined for all x and y by F(x,y)=xe^y-3+xy^2-2y. show the point (1,3) lies onthe level curve F(x,y)=4 and find the equation for the tangent line to the curve at the point (1,3).
B)
the NerloveRingstad production function y=y(K,L) is defined implicitly by y^1+elny=AK^mL^n, where A,m,n are positive constants. Find the marginal productivities of y w.r.t. K and L- that is, find dy/dK and dy/dL.
(take the logarith of each side and then differentiate implicitly)

2007-12-17 15:50:12 · 1 answers · asked by Anonymous in Mathematics

2007-12-17 15:49:11 · 2 answers · asked by Anonymous in Biology

If possible, include a diagram...
thanks alot!!

2007-12-17 15:49:08 · 1 answers · asked by Stick 2 in Earth Sciences & Geology

This is for fetal pig dissections.

2007-12-17 15:48:54 · 5 answers · asked by Emily C 1 in Biology

http://news.yahoo.com/nphotos/space-based-observatories-NASA-US-space-agency/photo//071218/photos_sc_afp/ccfe0fc0b6a17784428135eaeccdecf6//s:/afp/20071218/sc_afp/usscienceastronomyblackhole_071218023247;_ylt=AmqM6ATlupdX3NWKIql.g17QOrgF


I have a good idea that the galaxy is on the left, but where exactly is the core?

Can you help me figure this picture out?

2007-12-17 15:47:55 · 4 answers · asked by Jansen J 4 in Astronomy & Space

2007-12-17 15:45:48 · 6 answers · asked by mommalorrie@att.net 1 in Biology

horizantal surface, a force of 10 newtons is required. The force of friction between the surface and the object is....?

What is a equation i can use for this?

2007-12-17 15:44:50 · 5 answers · asked by Anonymous in Physics

This has to do with heredity in plants. I need a simple definition for this. Thank you!

2007-12-17 15:37:45 · 2 answers · asked by Nora 1 in Biology

How long can a cloud of dust last on the moon? Let's say you're on the moon and you find a soft patch of dust so you kick it up a few times with your foot (in a spacesuit, duh). Since there's no air to hold the dust up, the dust would just fall back down almost immediately, wouldn't it?

2007-12-17 15:34:14 · 6 answers · asked by Anonymous in Astronomy & Space

-x^0-x^2(x^0)^-3+4

x=-2
y=64

2007-12-17 15:33:35 · 2 answers · asked by Travis A 2 in Mathematics

He had an honorable Ph.D degree from Princeton University.

2007-12-17 15:32:23 · 3 answers · asked by chanljkk 7 in Physics

How to take 1st AND 2nd derivative of y=cos2x? Meaning take the 1st derivative and then take the derivative of that.

And also

the square root of x^2+1

and

(3s+5)^8

Please explain how to do it!! not just the answers.

2007-12-17 15:30:13 · 4 answers · asked by jyj 2 in Mathematics

In my Algebra 2/ Trig.class we were trying to figure out why when i= -1 i squared also equals -1. Please help!!!

2007-12-17 15:30:10 · 8 answers · asked by isiticedtea 3 in Mathematics

2007-12-17 15:29:53 · 9 answers · asked by Tamil from Vellore 7 in Engineering

a tall pea plant is crossed with a recessive dwarf pea plant. what will the phenotypic and genotypic ratio of offspring be

a. if the tall plant was TT?
b. if the tall plant was Tt?

2007-12-17 15:29:38 · 2 answers · asked by Sarah M 2 in Biology

I know that the adult human has 206 bones. For a project, I need to know how many bones does an adult fly have?

2007-12-17 15:23:08 · 12 answers · asked by kcrusaders1 2 in Zoology

2007-12-17 15:20:38 · 5 answers · asked by Anonymous in Weather

(3x^-2/y^-3)^-2 (x^4/y^6)^2

2007-12-17 15:18:56 · 2 answers · asked by Travis A 2 in Mathematics

2007-12-17 15:16:00 · 13 answers · asked by Anonymous in Astronomy & Space

(-3x - 4)/-16 * 4x/(-x - 2)

2007-12-17 15:15:08 · 12 answers · asked by Anonymous in Mathematics