Science & Mathematics - 10 December 2007

as it is farthest from sun so theres no possibility of life ever.

2007-12-10 14:09:02 · 5 answers · asked by sunny 1 in Earth Sciences & Geology

I would really love some references for this!

2007-12-10 14:08:04 · 3 answers · asked by pazdon 1 in Botany

Ok, so lets say i have animal cell A. The DNA in the nucleus has compacted to form 4 different chromosomes, each one shaped like an 'X' [with 2 chromatids and one centromere]. When the cell splits, the kinetochore fibers pull apart each of the 4 chromosomes, yielding 2 separate cells each with 4 HALF-chromosomes or 'chromatids'. Doesnt this mean that every time a cell does binary fission, it loses HALF its genetic information?

I just fail to see how this equation is even.
One cell has 4 chromosomes shaped like X's. It splits and makes 2 separate cells with 4 half chromosomes each [they are just shaped like lines]

PLEASE explain how cells formed by binary fission don't have HALF the genetic information as the original cell. This is really bothering me, haha.

2007-12-10 14:06:49 · 4 answers · asked by Anonymous in Biology

suppose n is a prime number (not equal to 2 or 5). suppose X is a random number. n divides X^2 - 5. prove that n has to be ≡ to 1 mod 5 or 4 mod 5.

2007-12-10 14:06:47 · 2 answers · asked by 3545 2 in Mathematics

Which is which?
what is an easy tip to remember which is which?

2007-12-10 14:06:36 · 21 answers · asked by Anonymous in Weather

was it Pythagoras? Galileo? someone else? please help

2007-12-10 14:06:16 · 4 answers · asked by kristen 1 in Astronomy & Space

2007-12-10 14:05:52 · 2 answers · asked by Courtney B 1 in Weather

A tumor is being treated with an experimental drug. Using medical imaging techniques, it is determined that the tumor is approximately spherical.
Use differentials to estimate the percent change in volume of the tumor if the radius is reduced from 2.0 cm to 1.9 cm.

2007-12-10 14:05:48 · 1 answers · asked by Anonymous in Engineering

I am supposed to plan, design and predict results for an experiment to compare the rate of photosynthesis in different light wavelengths.
I was thinking of setting up the usual apparatus with elodea and in the beaker of water used for heat absorption, I would place different coloured food colourings at different times. However, my teacher suggested we use bromothymol blue and its colour change with carbondioxide in some way

2007-12-10 14:04:59 · 3 answers · asked by Nicky P 1 in Botany

√-25 + √-16 = ?

the square root of -25 plus the square root of -16

2007-12-10 14:04:20 · 10 answers · asked by Anonymous in Mathematics

Natasha rides her bike (at a constant speed) for 3 hours, helped by a wind of 3 miles per hour. Pedaling at the same rate, the trip back against the wind takes 9 hours. Find find the total round trip distance she traveled.

a. 12 miles
b. 27 miles
c. 27 / 2 miles
d. 54 miles

2007-12-10 14:04:19 · 3 answers · asked by . 1 in Mathematics

I have seen these really small hopping bugs mostly around the sink in the last month or so. Then today I saw a bunch of what appears to be the adult versions of them caught between the flyscreen and door, so I took some pictures.

The size of the adult ones is about 1/8" / 4mm

Picture of the belly - http://img.photobucket.com/albums/v249/ligar/BugBelly.jpg
Picture of the top - http://img.photobucket.com/albums/v249/ligar/BugBelly.jpg

Thank you

2007-12-10 14:01:06 · 3 answers · asked by LeBela 1 in Zoology

if my topic is:
Will a [certain hydroponic] grow in soil?

what is my :
manipulated variable
responding variable

*thank you so much if you can help :]

2007-12-10 13:59:28 · 1 answers · asked by mily 2 in Botany

it's possible in theory, but is it possible in fact? if so what is it thats in perpetual motion on the earth?

2007-12-10 13:59:19 · 6 answers · asked by Anonymous in Physics

This is business calculus.

2007-12-10 13:58:50 · 2 answers · asked by ysmah29 1 in Mathematics

i dont understand any science what so ever!

2007-12-10 13:58:29 · 5 answers · asked by cArL 1 in Physics

ok how can m-theory be established if all 5 string theories have such a diffrent behavior and apperance of strings.for example type I have closed and open loops, but type IIA and IIB have open string that are attached to D-Brane. i also have a question about the 11th dimension

2007-12-10 13:55:52 · 3 answers · asked by Anonymous in Physics

Express standard temperature in Kelvin and standard pressure in Kilopascals.

2007-12-10 13:54:10 · 1 answers · asked by (: Muffin Man :) 2 in Chemistry

I know tan = y/x and cot = x/y. But I have some trouble on figuring whether x or y is negative when the number in the parentheses is negative. For example, take: tan -(5/4) or cot -(3/7) . How can i figure out whether x or y is negative?

2007-12-10 13:53:26 · 3 answers · asked by Just Me 2 in Mathematics

If an ostrich egg can support over a hundred pounds, how can a chick break out of it? does the egg become softer or something?

2007-12-10 13:52:17 · 1 answers · asked by Anonymous in Zoology

cat, dog, monkey, anteater, giraffe, squirrel, spider, wolf, tiger

2007-12-10 13:49:34 · 4 answers · asked by Kevin 1 in Zoology

how long does it take to produce a real one? I always thought it was thousands of years. If so, aren't authentic diamonds limited? Wouldn't the value of diamonds increase?

2007-12-10 13:48:16 · 2 answers · asked by Anonymous in Chemistry

2007-12-10 13:46:04 · 6 answers · asked by Mr_In_Famous 2 in Other - Science

I need help making a science scavenger hunt for highschool age kids. I need some ideas. The topic is over Physical science

2007-12-10 13:44:31 · 1 answers · asked by newyork03 1 in Chemistry

What classes can I expect to be taking? How old is too old to start (I'm almost 28)?

2007-12-10 13:41:08 · 4 answers · asked by Anonymous in Astronomy & Space

2007-12-10 13:39:18 · 6 answers · asked by Anonymous in Astronomy & Space

i have given the sand people water vaporators, but it still won't let me go to the eastern dune sea

2007-12-10 13:37:44 · 1 answers · asked by meepmine@att.net 2 in Astronomy & Space

2007-12-10 13:37:19 · 3 answers · asked by - 5 in Weather

http://youtube.com/watch?v=kaYnbZmsq0k&feature=related

it's a video of a blueish figure i theorized it was a bug or something you be the judge *thoughts?*

Though i have an open mind when i investigate and have a debunking approach i want people to give me there standpoints on this video from the skeptics and believers i want to see how many people classify this as paranormal and people who are like me debunk it! So lets see your thoughts guys :)

Ryan ~Paranormal Investigator/Researcher~
www.theprosonline.com

2007-12-10 13:36:00 · 10 answers · asked by teamhuntingevidenceofparanormal 2 in Paranormal Phenomena

A playground merry-go-round of radius 2.00 m has a moment of inertia I = 335 kg·m2 and is rotating about a frictionless vertical axle. As a child of mass 25.0 kg stands at a distance of 1.00 m from the axle, the system (merry-go-round and child) rotates at the rate of 11.0 rev/min. The child then proceeds to walk toward the edge of the merry-go-round. What is the angular speed of the system when the child reaches the edge?

2007-12-10 13:35:48 · 2 answers · asked by Brittany F 2 in Physics