Science & Mathematics - 12 January 2007

The science fair is on feb. 22 and i havent even picked a topic!!!! HELP!!!!!

2007-01-12 14:11:26 · 7 answers · asked by cutiebugg0806 1 in Other - Science

2007-01-12 14:09:25 · 9 answers · asked by Anonymous in Zoology

Do daily wear contact lenses mold to the shape of your eye after so long?

2007-01-12 14:07:22 · 4 answers · asked by Dr. Donna (lol) 1 in Medicine

im in 8th grade so could you tell me about it in simpler terms? im learning about ramps and wedges and stuff thanks!

2007-01-12 14:05:16 · 4 answers · asked by Anonymous in Mathematics

2007-01-12 14:04:58 · 2 answers · asked by katie32u 2 in Weather

2007-01-12 14:03:43 · 1 answers · asked by katie32u 2 in Earth Sciences & Geology

I just came across this page that outlines the benefits of having a World Calendar, starting in 2012:
http://www . theworldcalendar . org/TWC-v.-Gc-page.htm
I'm curious what the chances of success of such a project are.
I think the traditionalists would never allow it, it's like expecting the US to switch to the metric system in the near future, just because it's logical and easier. (Quick, how many feet are in a mile?)
What do you think?
Mar =)

2007-01-12 14:02:42 · 8 answers · asked by grupoamikema 4 in Astronomy & Space

The ramp (picture link) is 18 meters long and 4.5 meters high.

*picture link: http://img206.imageshack.us/img206/2450/scangd4.jpg

a.What force, parrallel to the ramp (Fa) is required to slide a 25 kg box at constant speed to the top of the ramp if friction is disregarded?
b. What is the IMA of the ramp?
c. What are the real MA and the efficiency of the ramp if a parrallel force of 75 N is actually required?

Please help me with this problem.
I'm having trouble understanding it.

2007-01-12 14:01:19 · 2 answers · asked by vicky p 1 in Physics

I've been studying for my high school entrance exam, and I know all the types of questions except for this. It's showing up a lot in the practice tests so I think I really need to know how to solve it.

Example:

If Martha can paint a house in 4 hours, and Jack can paint the same house in 3 hours, while Max can paint the house in 5 hours, how much time would be spent if they painted the house together?

Test is tomorrow morning so please answer ASAP.

2007-01-12 13:59:58 · 18 answers · asked by Caitlin 2 in Mathematics

What are some limitations of space exploration?

2007-01-12 13:59:28 · 20 answers · asked by katie32u 2 in Astronomy & Space

2007-01-12 13:58:54 · 1 answers · asked by C P 1 in Physics

i obviously have many talents elsewhere, was never the math wiz type. just curious how you mathematical geniuses think...
I bet you think in a very orderly, systematically fashion, yes? and everything relates to numbers in some way?
Describe you day in thinking in general, what goes thru ur mind day in and day out as far as ur thinking patterns
lol, u probably think i'm nuts, haha.
But i'm CURIOUS :o)
(i'm the creative type to a fault my dear)

2007-01-12 13:58:36 · 12 answers · asked by Anonymous in Mathematics

2007-01-12 13:55:23 · 6 answers · asked by kanwar pal s 1 in Chemistry

2007-01-12 13:54:38 · 5 answers · asked by kanwar pal s 1 in Chemistry

For each of the following statements
a-write as an englsh sentence that does not use the symbols for quantifiers
b-Write the negation of the statement in symbolic form in which the negation symbol is not used.
c-Write a useful negation of the statement in an English sentence that does not use the symbols for quantifiers.
d-Also tell if TRUE or FALSE

√= square root

1-(∀x∈ Z) ( x is even or x is odd)
2-(∃x ∈ Q) ( √2 3-(∀x ∈ Z) ( if x2 is odd, then x is odd)
4-(∀n∈N) (n2-n+41 is a prime number)

2007-01-12 13:53:49 · 3 answers · asked by Anonymous in Mathematics

2007-01-12 13:52:23 · 23 answers · asked by Ang 3 in Medicine

Which of these is not used to calculate change in thermal energy?

a) volume
b) temperature change
c) specific heat
d) mass

2007-01-12 13:51:54 · 4 answers · asked by James A 1 in Physics

Given: Circle Z.
Seg. AE congruent Seg. DB
Conclude: Triangle ACD congruent Triangle BCE

go here for diagram. http://i11.tinypic.com/2m2e4jt.jpg


Thankss

2007-01-12 13:51:24 · 4 answers · asked by <3 1 in Mathematics

3/n-5 - 1/5-n Need help solving this problem....need to find common demoninator first...thanks

2007-01-12 13:50:13 · 6 answers · asked by gail 1 in Mathematics

what do you call the type of genius Einstein is

2007-01-12 13:49:48 · 5 answers · asked by Anonymous in Other - Science

If the velocity of an object increases, the __ of the object will also increase.

It has to be on of these..im stuck what could it be? Is it A?

a) kinetic energy
b) mass
c) specific heat
d) potential energy

2007-01-12 13:48:27 · 6 answers · asked by James A 1 in Physics

18 is what percent of 24
18 is what percent of 45
32 is waht percent of 24
50% of a number is 20 then 75%of the same number is
40% of 60 is equal to 60% of what number

2007-01-12 13:47:11 · 6 answers · asked by Sara 3 in Chemistry

In Geometry, what is the difference between Collinear and Coplanar points?

2007-01-12 13:46:59 · 8 answers · asked by Richard P 1 in Mathematics

Here's the question:
Find the center and the radius for the circle x^2-2x+y^2-4y-4=0.

...somehow I have to "complete the square" and factor it...im not sure how to do it, can someone show like, a step-by-step method of solving this??
thanks!!!

2007-01-12 13:46:17 · 8 answers · asked by Anonymous in Mathematics

mosquitos

2007-01-12 13:44:44 · 9 answers · asked by Matthew S 3 in Zoology

Please explain your answer. If your are comfortable, please include you age. Just a little research.

2007-01-12 13:42:19 · 10 answers · asked by All-One 6 in Biology

Do you like being cold and living in an area where it snows in winter or do you like the warmth of the desert this time of the year. And why?
I miss the desert, get me out of this snow in Northern Nevada. It is below the teens this week and snow and cold. Thanks

2007-01-12 13:41:58 · 6 answers · asked by Nevada Pokerqueen 6 in Weather

are there any animals reptiles, that preys on them.

2007-01-12 13:41:43 · 8 answers · asked by donwsrbelridtr@sbcglobal.net 1 in Zoology

bricks feathers

2007-01-12 13:41:09 · 60 answers · asked by Matthew S 3 in Other - Science

its kinda scary to think about.i just watched the war of the worlds movie.do you think that would really happen?and do you think the government knows about aliens and ufos and is keeping it a secret?

2007-01-12 13:38:14 · 16 answers · asked by kahlien05 1 in Astronomy & Space