Science & Mathematics - 1 January 2007

2007-01-01 16:17:40 · 3 answers · asked by Anonymous in Biology

2007-01-01 16:17:05 · 14 answers · asked by swimchick793@pacbell.net 1 in Mathematics

Uranium -238 has a half life of 4.51 x 10^9 y. How much of the original radioactive materal will remain after 9.02 x 10^9 years?

2007-01-01 16:15:51 · 7 answers · asked by Azumi 2 in Mathematics

2007-01-01 16:10:00 · 2 answers · asked by MAJA MAIS 1 in Astronomy & Space

what would be indirect proofs for these?
Given: m<1 =/(not equal ) m< 2
Prove: Tri.ABC is not an isosceles triangle with vertex B.


2.Given: m<1 + m<2 =/(Not equal) 180
Prove: a is not parrallel to b

2007-01-01 16:09:31 · 3 answers · asked by confuzzled.... 1 in Mathematics

2007-01-01 16:04:36 · 19 answers · asked by yellow 1 in Astronomy & Space

a. break down of 1g of salt into its molecular components?
b. break down of 1g of sugar into its molecular components?
c. burning 5 large logs of wood
d. burning 3 tons of coals?

I think its B, but I am not sure. Please explain

2007-01-01 15:58:34 · 5 answers · asked by Azumi 2 in Chemistry

a circle is inscribed in a rhombus whose diagals are 30cm and 40cm. what is the area between the rhombus and the circle?

could someone help pleasee? i dont understand how you can find the area with just the diagnols given ?

2007-01-01 15:52:23 · 2 answers · asked by Anonymous in Mathematics

2007-01-01 15:49:42 · 2 answers · asked by niki347 1 in Chemistry

Guys all know abt Owl, it can turn it head in 360 degrees. There is an insect which can also do the same, which one??????

please help me and i willl do the same in one way or the other...

2007-01-01 15:43:36 · 2 answers · asked by Anonymous in Zoology

Isnt rain a really bad thing for leather?

2007-01-01 15:41:03 · 9 answers · asked by BudLt 5 in Zoology

Joe Spent half of the money in his wallet on a table for his computer printer. He then spent $8.12 for a printer ribbon. Then he spent half of what he had left on supplies for his office. He then had $14.50 remaining. How much money did Joe have to start with?

2007-01-01 15:41:02 · 8 answers · asked by confuzzled.... 1 in Mathematics

what is
m = n^2 - 3n
m = -2n^2 - 3n

and when i put it into coordinate form i got 0,0 i just think i got it wrong.
If some1 wants to see the way i did it tell me and ill add it in

2007-01-01 15:40:23 · 6 answers · asked by mikyd 1 in Mathematics

verify tat,for all values of t,the point P ( at,at^3) lies on the curve y= x^3 / a^2 and find the equation of the tangent to the curve at this point.if the tangent at P meets the x-axis and y axis at Q and R respectively,find area of triangle OQR and the equation of locus midpoint of QR as P moves on original curve

2007-01-01 15:38:19 · 2 answers · asked by pinkiezbox 1 in Mathematics

I need objects that are made from petroluem.

2007-01-01 15:36:12 · 3 answers · asked by LuvU 1 in Other - Science

I need any object that is made from petroluem.

2007-01-01 15:35:32 · 4 answers · asked by LuvU 1 in Chemistry

2007-01-01 15:32:33 · 2 answers · asked by Anonymous in Chemistry

the medians of a right triangle that are drawn from the verticies of the acute angles have lengths of 2squareroot13 and squareroot73. what is the length of the hypotenuse?

anyone get it? im sort of lost...please help asap

2007-01-01 15:31:40 · 5 answers · asked by Anonymous in Mathematics

I am trying to help out my daughter with math, if you can help me to find out if I am on the right track I would appreciate it.
Thanks

2007-01-01 15:27:39 · 11 answers · asked by Monica 1 in Mathematics

Help please

2007-01-01 15:26:28 · 5 answers · asked by Ask&learn 3 in Biology

who owns this # and were is it

2007-01-01 15:25:16 · 4 answers · asked by stormy 1 in Astronomy & Space

Background info: Chimieras are a mix of Two different creaters DNA mixed together to make a totally different creature. Now I saw a website that is gonna start seling chimeras that are mix of Human and rabbit DNA into...the thing looks disgusting almost like a stil born baby , the website thats selling them will be www.genpets.com ....telll me what's your outlook on this creature and do you think if this is for real or just a joke.

2007-01-01 15:23:33 · 5 answers · asked by 0_0 4 in Biology

2007-01-01 15:19:23 · 6 answers · asked by Anonymous in Other - Science

SIMPLIFY

(8n^2-6n+1)-(15n^2-27n-1)

SIMPLIFY
(4a^5b)(5a^2b^4)

FACTOR
p^3q-pq



and if you know how to do this:

find two consecutive odd integers such that the sum of their squares is 130.



THANK YOU VERY MUCH =]

2007-01-01 15:14:12 · 6 answers · asked by yoursmilemakesme 2 in Mathematics

How to prepare 1 mole of sucrose soultion? What is the osmolarity of this solution? (hint: one molar solution of a substance contains 1 mole of that substance dissolved in 1 litre of water)

2007-01-01 15:11:45 · 1 answers · asked by Tavis T 1 in Chemistry

I need some simple fun science experiments to do with my six year old boy using everyday objects and products. Please can you post me any great ones you know of along with a simple explanation of how to do it and why it happens.

2007-01-01 15:11:38 · 8 answers · asked by T 3 in Other - Science

For example, say I wanted to find a perfect square of the form
z2 + 180z - 88

I happen to know through trial and error that a valid answer is z = 22, but how do I figure out this kind of problem in general?

2007-01-01 15:08:28 · 7 answers · asked by Anonymous in Mathematics

My son (6) and I are doing a series of little science experiments. We knew about this one but don't know why this happens. We get a glass of vinegar and add a spoonful of bicarb soda and the result is a fizzy type erruption. Why is this the result of these two products mixing? In SIMPLE six year old terms, thank you.

2007-01-01 15:08:15 · 6 answers · asked by T 3 in Chemistry

What number do you divide into what number to get the ratio of the circumfernce of a circle to its diameter? 3.1416. . . .?

2007-01-01 15:07:43 · 9 answers · asked by Anonymous in Mathematics

Assuming evolution is correct, what "tells" an organism to adapt. Does genetic material do it, DNA, what? If you say nature, what do you mean by "nature"?

2007-01-01 15:07:21 · 7 answers · asked by Anonymous in Biology