Science & Mathematics - 28 January 2007

why we used in detail of architecture and engineering.

2007-01-28 13:12:12 · 1 answers · asked by pacilia 1 in Engineering

list three things

2007-01-28 13:11:23 · 10 answers · asked by Anonymous in Biology

prove that sec square of x times cscx divided by sec square of x plus csc square of x equals to sinx

2007-01-28 13:11:06 · 2 answers · asked by zero 1 in Mathematics

2007-01-28 13:10:12 · 3 answers · asked by Lim S 3 in Zoology

may i know the mothod of construction and the method of using raft foundation?

2007-01-28 13:10:07 · 1 answers · asked by pacilia 1 in Engineering

what is an activity series and how is it used in a single displacement? please give me an examples and real-life application if possible^^

2007-01-28 13:09:33 · 1 answers · asked by aebin 4 in Chemistry

16x^2+56x+49

2007-01-28 13:08:46 · 6 answers · asked by lookitzhealthy 2 in Mathematics

The radius of a right circular cylinder is given by sqrt(t+2) and its height is (1/6)sqrt(t), where t is time in seconds and the dimensions are in inches. Find the rate of change of the volume with respect to time.

2007-01-28 13:08:34 · 3 answers · asked by dudeman 1 in Mathematics

2007-01-28 13:07:49 · 2 answers · asked by Lim S 3 in Zoology

can anyone explain to me how to solve this problem and the answer please?

[ (x^1/2y^-3/2) / (y^-1/2) ] ^ -2

(25x^3/4) / (5x^4/5)

2007-01-28 13:07:08 · 4 answers · asked by pokeralchemist 2 in Mathematics

the question says to find the integrating factor.

(12+5xy)dx + (6xy^(-1) +3x^2)dy =0

the little ^ indicate powers.... wasn't sure of the proper notation.

I can do the normal ones but this one seems to never cancel anything out......

any help apreciated

2007-01-28 13:03:27 · 1 answers · asked by james m 3 in Engineering

Yeah both mean an eye doctor but what is the difference between the two?

2007-01-28 13:03:13 · 4 answers · asked by osunumberonefan 5 in Medicine

x^2+12x+36

2007-01-28 13:02:08 · 7 answers · asked by lookitzhealthy 2 in Mathematics

just trying to resolve a discussion between myself and one ofmy friends as to whether or not there are flying squirrels in newfoundland

2007-01-28 13:02:07 · 2 answers · asked by E_NA_NA 2 in Zoology

Has anyone seen the movie Prozac Nation? Why are we so depressed this day and age that so many people including teens on anti-depressants. Also, all you hear about in kids now is ADD, and taking meds for this. I'm in my early 40's and it seems like things go in waves, when my kids were babies, which they were lucky not to have this, they were putting in tubes in ears...is this all just a money making thing, or is the world's environment changing so fast, that we are getting chemically induced somewhere that makes us/people have to take this medicine. Any views on this

2007-01-28 13:00:59 · 6 answers · asked by Confused 3 in Medicine

2007-01-28 13:00:03 · 14 answers · asked by rappernana13 1 in Mathematics

2007-01-28 12:59:57 · 2 answers · asked by ninekittys 3 in Chemistry

2007-01-28 12:58:53 · 3 answers · asked by Anonymous in Chemistry

I have problems like:

2x-2= 4x+6

2.6h+18= 2.4h+22

Can you explain how to solve these two step problems?

2007-01-28 12:58:42 · 11 answers · asked by Anonymous in Mathematics

2007-01-28 12:57:57 · 2 answers · asked by eg4ever1 1 in Chemistry

simultaneous equation

2007-01-28 12:57:50 · 12 answers · asked by Novlette B 1 in Mathematics

Could someone tell me some more info on Apollo 9? The "Spider" LEM. Or where I could read vaild info on it? Thanks.

2007-01-28 12:57:21 · 2 answers · asked by hello. it's me. 4 in Astronomy & Space

produced from moving water.Usally the water is stored behind a dam on a river.As the water passess throuth a turbine, it spins the blades of the turbine.The rotating motion turns on a generator which produces electicity.

2007-01-28 12:56:30 · 4 answers · asked by bratz g 1 in Physics

30x^2-5x-10

2007-01-28 12:55:46 · 3 answers · asked by lookitzhealthy 2 in Mathematics

Solve the differentials by laplace transform
x''''(t) + x'''(t) = cos (t)
x(0) = x'(0) = x'''(0) = 0 x'' (0)=1

So i haven't covered laplace transforms in about 2 years and what i remember was the teacher saying "it wasn't on the final, so we won't cover it."
Need to know it now, and current prof expects us to already know it.....only went over what to do after we transform.

This is what i did.
S^4 x(s) - s^3 x(0) - s^2 x ' (0) - s x''(0) - x'''(0) +
s^3 x(s) - s^2 x(0) - s x'(0) - x''(0) = s^2 / (s^2 + 1)

Sub in the boundy conditions and solve for x(s). Is this correct so far?

thanks in advance

2007-01-28 12:54:24 · 2 answers · asked by My name is not bruce 7 in Mathematics

2007-01-28 12:54:22 · 1 answers · asked by beboe007 1 in Mathematics

The sum of the reciprocal of an intezers and 3 times of the next higher is 11/24,find the reciprocal intezer.

2007-01-28 12:53:48 · 5 answers · asked by angel 1 in Mathematics

A chemist has a 35% saline solution and a 60% saline solution available. How many millitliters of each of these available solutions should she mix to obtain 700ml of a 40% solution?

2007-01-28 12:51:51 · 4 answers · asked by lonergirl 1 in Mathematics

From what I understand, the energy of xrays increase at a certain value specific to the anode material. I can not find any information on characteristic peak, all my searches lead me to kilovolt peak.

2007-01-28 12:51:11 · 1 answers · asked by natasha a 1 in Physics

when gravity pulls down

2007-01-28 12:50:53 · 9 answers · asked by misstraceyb 1 in Astronomy & Space