Science & Mathematics - 24 October 2007

A force of 715N stretches a certain spring a distance of 0.155m .Take the free fall acceleration to be = 9.80m/s^2 .

2007-10-24 11:01:42 · 2 answers · asked by Natiphy2007 1 in Physics

2007-10-24 11:01:37 · 1 answers · asked by Maureen E 2 in Earth Sciences & Geology

Deflection and stresses in a beam can be determined through the use of a ______________.

a)chart b)torque analyzer

c)scale d)shear-moment diagram

2007-10-24 11:01:03 · 2 answers · asked by Anonymous in Engineering

What is the integral of e^(1/x)/x^2 ?

Please do it step by step

2007-10-24 11:01:02 · 2 answers · asked by Anonymous in Mathematics

were doing are homework and we need help with this
if 21 = 5^2 - 2^2 and 11^2 - 10^2, how do you find the equation for numbers there are more than one way to square.
the #s that have more than one way r :

9, 15,16, 21, 24, and 25.
none of the eqations we come up with work for 21.thanx

2007-10-24 10:59:23 · 1 answers · asked by ? 2 in Mathematics

when u explain please give an answer in detail or give a website this is a homework queastion from science

2007-10-24 10:58:41 · 3 answers · asked by Anonymous in Physics

60 Calories is added to 1 gram of water at an initial temperature of 80 degrees Celcius. What is the water's final temperature and state (solid, liquid, or vapor)?

2007-10-24 10:56:04 · 1 answers · asked by qtbabymin 1 in Chemistry

I don't understand how speakers can produce and how we can hear more than one sound or frequency at a time.

2007-10-24 10:53:07 · 3 answers · asked by Anonymous in Physics

ok its factoring. I was supposed to learn it in 9th grade but i was in an advanced class and skipped the class where i should have learned it. So i only know a little bit of factoring. it doesn't help that my math teacher is an idiot and just rambles on about football (he is the varsity coach) all hour.

so can someone explain to me how to factor the sum or the difference of to cubes. I dont just want an answer to the problems i want to understand how to do it.

i cant make the little threes for the cubed signs on the computer but here are some example problames.

8Xcubed - 1

Xcubed - Y cubed


thanks for the help.

2007-10-24 10:51:02 · 6 answers · asked by Steubs 4 in Mathematics

2007-10-24 10:48:43 · 6 answers · asked by Kipper 3 in Earth Sciences & Geology

I've heard some tell me that:

"The Milankovitch cycles can predict future climate patterns over the long term. The changes are gradual, over thousands of years."

But What are these cycles?

2007-10-24 10:45:43 · 4 answers · asked by Anonymous in Earth Sciences & Geology

2007-10-24 10:45:22 · 4 answers · asked by Nicholas L 1 in Mathematics

just need it to now

2007-10-24 10:45:03 · 3 answers · asked by Anonymous in Astronomy & Space

2007-10-24 10:43:35 · 3 answers · asked by hello.mate 2 in Mathematics

2007-10-24 10:42:53 · 5 answers · asked by lily 1 in Biology

I've seen slope written as degrees - 5 degrees, or as a per cent - 3%. These two are supposed to be the same angle of incline. How are the degrees or percentage determined?

Für Elise – Support the Cancer & Heart Foundations

2007-10-24 10:38:37 · 4 answers · asked by Lil Bro 2 in Engineering

This is for a school project, I need to make a boat that can float with 4 or more pounds on it, and it can't drown. I need to know the best wood that can be used to float on water.

2007-10-24 10:38:24 · 3 answers · asked by Tesmy 1 in Other - Science

A piece of wire 13 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. (Give your answers correct to two decimal places.)

(a) How much wire should be used for the square in order to maximize the total area?

(b) How much wire should be used for the square in order to minimize the total area? 5.65 m

I found B(and it is correct), I just cant find A for some odd reason, if you could show the steps and the answer that would be highly appreciated.

2007-10-24 10:36:23 · 2 answers · asked by Ant 3 in Mathematics

2007-10-24 10:35:14 · 6 answers · asked by jamison1979 1 in Mathematics

One reason was that the insects developed a resistance to the product. Suggest another reason using knowledge about populations, food chains, predators and competitors.

2007-10-24 10:34:53 · 2 answers · asked by Anonymous in Botany

2007-10-24 10:33:46 · 7 answers · asked by azngurl0088 1 in Biology

I need this for a school project that is due Friday. Are there different types of horsetails like there are different types of flowers?

2007-10-24 10:33:18 · 5 answers · asked by squrlygonewild 1 in Botany

who developed theory of atomic power?

2007-10-24 10:31:20 · 1 answers · asked by blackfootprincess1 1 in Chemistry

(A) O(B) B(C) C(D) Li(E) Ne(F) N

2007-10-24 10:31:05 · 3 answers · asked by Anonymous in Chemistry

At a dog show, there were a number of humans and dogs. Someone said there were 62 ft. and 24 heads total. how many humans and how many dogs were there? show how u found ur answer and EXPLAIN y u did it. PLEASE EXPAIN

2007-10-24 10:29:19 · 6 answers · asked by Anonymous in Mathematics

How do you calculate the pH of a solution at saturation when given the insoluble salt and its Ksp?

2007-10-24 10:27:57 · 2 answers · asked by Tiffany 4 in Chemistry

I need as many as possible
If you give the most reasons I will vote you as best answer.
Please do this as soon as possible

2007-10-24 10:24:20 · 1 answers · asked by jl 2 in Earth Sciences & Geology

2007-10-24 10:22:35 · 3 answers · asked by Anonymous in Weather

2007-10-24 10:22:12 · 6 answers · asked by qignis 2 in Physics

how can the energy of waves traveling through water affect a shoreline?
Imagine that there is a large bouldozer on teh edge of a shoreline. If the wave period is 15s long,how many times is the boulder hit in a year? PLEASE SHOW UR WORK
how can severe storms over the ocean affect shoreline erosion and depostion?
how could a headland change in 250 years? describe some of the featurs that may from!!!

2007-10-24 10:21:48 · 1 answers · asked by Anonymous in Weather