Science & Mathematics - 13 September 2007

2007-09-13 11:08:07 · 3 answers · asked by lord_andys_new_id 1 in Engineering

describe the "push-pull" factors that brought many immigrants to the United States. Include details and examples

2007-09-13 11:06:17 · 1 answers · asked by boogey s 1 in Geography

I know someone who says that humans did not evolve from other animals but does believe in evolution in general, so can someone please go find solid proof of that being true/untrue? I'd like to just like to have some link to an article, essay, etc.

2007-09-13 11:02:10 · 8 answers · asked by filet o' fish 1 in Biology

I have a builder that is building a house that has spray foam in the walls and on the roof. I talked to the insulator and he said a rule of thumb is to use 1000 sq ft per ton, I can't use just a rule of thumb in need something solid. Does anybody know where to get info on how to run a load with this stuff? The newest edition of Manual J I have doesn't have anything in there about it. He can't give me any R-values on any of this because he says the values will be to low and it will look like I need to take out more BTUH. How am I supposed to do a job when I can't find any info about it.

2007-09-13 11:01:57 · 1 answers · asked by markandjess2003 3 in Engineering

2007-09-13 10:59:49 · 10 answers · asked by Anonymous in Mathematics

2007-09-13 10:57:40 · 6 answers · asked by Anonymous in Geography

Water cycle

2007-09-13 10:55:24 · 3 answers · asked by tico.pizza 1 in Earth Sciences & Geology

thanks

2007-09-13 10:52:28 · 4 answers · asked by Diana G 1 in Earth Sciences & Geology

2007-09-13 10:50:18 · 3 answers · asked by Anonymous in Earth Sciences & Geology

what is the physics behind a music composer? i have to write an essay about a music composer, but its for physics. and i just dont understand the relation between the two?

2007-09-13 10:44:48 · 1 answers · asked by Anonymous in Physics

is positive? Is the 0 taken into consideration rendering not all numbers positive or its only use is for the distance between?
thanks , and thanks Dan-ye from other question

2007-09-13 10:43:46 · 5 answers · asked by parev 1 in Mathematics

Such as 2x + 5y=1 -x+6y=8

2007-09-13 10:43:07 · 3 answers · asked by Anonymous in Mathematics

Hey I am in Calculus right now and my teacher gave us this packet with questions from previous Ap exams.

1980 AB3

Let f(x)=ln(x^2) for x>0 and g(x)=e^(2x) for x>(or equal to)0. Let H be the composition of f with g, that is, H(x) = f(g(x)), and let K be the composition of g with f, that is K(x)=g(f(x)).

(a) Find the domain of H and write an expression for H(x) that does not contain the exponential function.

(b) Find the domain of K and write an expression for K(x) that does not contain the exponential function.

(c) Find an expression for f^-1(x), where f^-1 denotes the inverse function of f, and find the domain of f^-1.

I would really appreciate your help. I need answers by tonight, thanks.

-Also I need to show work so if you can show how you got it I would appreciate it, but if you know the answer, or just one of the answers, I will accept that aswell, thanks.

2007-09-13 10:41:48 · 4 answers · asked by zach q 1 in Mathematics

What does x+2+2x=x+10=

When You Get The Answer sHOW yOUR wORK bECAUSE i Don Remeber How to explain it

thank u

2007-09-13 10:40:23 · 5 answers · asked by Anonymous in Mathematics

cos it was green thats why! and global temperatures were much warmer than they are today

2007-09-13 10:39:38 · 13 answers · asked by Anonymous in Weather

this is for speed and accelerration calculations and i am not good in math and really need help and thanks too all who respond

2007-09-13 10:37:39 · 3 answers · asked by pinchback_12 1 in Mathematics

2007-09-13 10:35:13 · 5 answers · asked by Anonymous in Mathematics

Lets say you're naming segments that are the same, would you write that their equal or congruent?

Lets say you're naming angles that are the same, would you write that their equal or congruent?

Lets say you're naming lines that are the same, would you write that their equal or congruent?

is there any way of knowing which one it is?

Thanks :)

2007-09-13 10:31:51 · 3 answers · asked by luckyplaya23 2 in Mathematics

We are preparing for a major competition and came across with cos 2 and cos 2^0. What is the difference in the graph of the two? Even if we write as cos 2x and cos 2^0x, we still can't see the difference between the two.


This question really got me confused and I don't think it has got to do with the double angle.

Thanks in advance.....

2007-09-13 10:28:38 · 1 answers · asked by rochelle 2 in Mathematics

Anyone know anything about factoring trinomials?

Okay factor completely??

1) 36 x^2 + 60 +9

2) 24x^2 - 46x + 10

2007-09-13 10:26:00 · 4 answers · asked by Anonymous in Mathematics

2007-09-13 10:23:08 · 5 answers · asked by vincentchan16@sbcglobal.net 2 in Chemistry

A 5 gallon cylindrical tank contains orange juice.
http://i6.tinypic.com/6g1rqlh.gif
It took 15 seconds to fill the first 10 oz glass.
(ignore viscosity of the juice)

2007-09-13 10:21:21 · 2 answers · asked by Alexander 6 in Physics

Something such as -4 x (-3) = 12 and 4 x 3 = 12, why do the negatives cancel out?

2007-09-13 10:19:21 · 6 answers · asked by blue.rose7 2 in Mathematics

okais,

i have the product for a reaction: ethanol, c2h5oh
how do i work out the reactats?

2007-09-13 10:15:57 · 3 answers · asked by Anonymous in Chemistry

two planes left an airport at noon. one flew east at a certain speed and the other flew west at twice the speed. the planes were 2700 miles apart in 3 hours. how fast was each plane flying?

lol i no ive learned this b4 but i just cant rmbr wat to do, can u help?

2007-09-13 10:14:42 · 7 answers · asked by ♫ɱƱ§ΐɔ ƜɑʞƐƨ ƮɧƏ ʍΘɽɩɖ ɢΏ ƦȯʋɲƉ♫ 3 in Mathematics

2007-09-13 10:13:33 · 4 answers · asked by Pauly Walnuts 2 in Chemistry

i have a chemistry test tomorrow and i have no clue how to do this?
can you please explain how you would do this problem:

Find density of 25g of copper in 4.8 liters of H2O??

2007-09-13 10:13:31 · 2 answers · asked by Anonymous in Chemistry

What does that mean? Does that mean that we're to plug in something from the left and then something from the right to get two values or is there some complex way to do it that my teacher decided not to share with us? The problems I'm asking about specifically are:
find the derivatives from the left and form the right at x=1 (if they exist). Is the funcion differentiable at x=1?
53. f(x) = abs(x-1)
55. f(x) = (x-1)^3, x less than or equal to 1
(x-1)^2, x > 1

thanks for the help

2007-09-13 10:12:14 · 2 answers · asked by Chelsea 5 in Mathematics

Chem hw. is this right? : 10 km x 1000m/1km x 1760/1m x 1mi/1.094 yd = 6.21 miles

2007-09-13 10:10:25 · 3 answers · asked by Anonymous in Chemistry

Hey I am in Calculus right now and my teacher gave us this packet with questions from previous Ap exams.

1975 ABI

Given the function f defined by f(x)=ln(x^2-9)

(a) Descibe the symmetry of the graph of f.

(b) Find the domain of f.

(c) Find all values of x such that f(x)=0

(d) Write a formula for f^-1(x), the inverse function of f, for x>3.

I would really appreciate your help. I need answers by tonight, thanks.

-Also I need to show work so if you can show how you got it I would appreciate it, but if you know the answer I will accept that aswell, thanks.

2007-09-13 10:09:21 · 2 answers · asked by zach q 1 in Mathematics