Science & Mathematics - 18 October 2007

the number of centimeters, d, that a spring is compressed from its natural uncompressed position is given by d=sq.rt2w/k,where k is the number of joules of work done to move the spring and k is the spring constant. solve this equation for w. use the result to determine the work needed to move a spring 4 centimeters if it has a spring constant of 0.2

2007-10-18 12:51:00 · 2 answers · asked by Dill K 1 in Mathematics

You know how in cardiac bypass surgery ( CABG) , they have to graft a part of another blood vessel to redirect the flow of blood. Why can't they just take out the particles that is clogging the vessel? Sorry if this is a dumb question :l

2007-10-18 12:49:43 · 3 answers · asked by Anonymous in Medicine

2007-10-18 12:48:52 · 3 answers · asked by Anonymous in Mathematics

I live in Western South Carolina and see a very bright "star or planet at about 2:00AM approximately 130 degrees magnetic and perhaps 35 degrees above the horizon.
It seems extremely bright, too bright to be a star, and I cant figure out its identity.
Any help ould be appriciated.
Thanks from,
Captain Jeff

2007-10-18 12:48:26 · 14 answers · asked by capnjfmcg 1 in Astronomy & Space

2007-10-18 12:48:15 · 4 answers · asked by jontae_collins@sbcglobal.net 2 in Botany

that are 47 inches and 33 inches, respectively. what is the height of the son, to the nearest inch?

2007-10-18 12:46:29 · 3 answers · asked by xoxoxo 4 in Mathematics

I have to have the answer for Science class tommorow!!!!

2007-10-18 12:42:16 · 9 answers · asked by youngnbold014 1 in Astronomy & Space

2007-10-18 12:40:33 · 2 answers · asked by heeeysuzie 1 in Physics

well im using an op amp in a circuits class and we connected some resistors on a breadboard and were asked to find the gain at different frequencies ( we used a function generator as the power source with a sine wave setting i dont know if that helps) and as i get to frequences of about 100kHz my gain is no longer close to the value i calculated using vin/vout why is this???

please help

2007-10-18 12:39:47 · 3 answers · asked by bob mark 2 in Engineering

2007-10-18 12:37:25 · 0 answers · asked by Anonymous in Chemistry

the backside of the moon has a crater impact on the other side of it (almost centered), making the moon almost appear to be an eye. What do you think this would have done to our development as early peoples? (such as impact?)

2007-10-18 12:36:42 · 4 answers · asked by SwiftKill 4 in Astronomy & Space

A physicist on planet Mongo is using a device equivalent to Atwood's machine to measure the Mongoian gravitational acceleration gm. He fixes one of the two 0.40kg masses at each end of the rope. While both are at rest, he places a 0.025kg gronch (a toadlike creature) on one of the masses. That body and its wart-covered passenger descend 0.50m before the gronch hops off. The body continues traveling downward another 0.8m in the next 3.0s. Compute gm.

please help me with the question.
I'm stuck for hours on this.

2007-10-18 12:36:13 · 2 answers · asked by Seongmo L 1 in Physics

use newtons method to approximate the value of cube root (59)

how would that translate into F(x)
so i would be able to use it in the formula

2007-10-18 12:35:37 · 1 answers · asked by Anonymous in Mathematics

2007-10-18 12:32:52 · 6 answers · asked by krissy 1 in Mathematics

If it is remotly possible i need to know how. just a bit of the science behined it.

2007-10-18 12:32:26 · 9 answers · asked by K8E! 1 in Astronomy & Space

Can help me in this question? It is from an assignment of my biology class.

2007-10-18 12:32:14 · 2 answers · asked by rudysophy 1 in Biology

how long-ago does technology date back?

2007-10-18 12:32:13 · 6 answers · asked by Mr.Cheat 1 in Astronomy & Space

2007-10-18 12:31:58 · 6 answers · asked by MOOO :) 2 in Astronomy & Space

We were assigned these problems to do for homework where we're supposed to find the zeros of these equations (cubic, quartic, all those). I did all the synthetic division and all that, did all the stuff, but then got stuck!

So my question is:

Is the Square root of -19, 19i ?

I thought I was right, but someone told me otherwise.
Am I right? If not, can you explain what the correct answer is and how you got it?

Thanks.

2007-10-18 12:30:13 · 4 answers · asked by Anonymous in Mathematics

Find the volume of a solid torus (donut shape) with r as the radius of the circular cross-section of the torus, and R as the distance from the torus center to the center of any cross-section.

2007-10-18 12:28:26 · 4 answers · asked by Bryan K 1 in Mathematics

I'm taking General Chemistry 1 and I'm having problems understanding how to do different calculations. My textbook isn't all that clear. Are there any books out there that break it down for you step by step?

2007-10-18 12:28:15 · 2 answers · asked by pixie21 3 in Chemistry

what are some related organelles to the one that follow:

cell wall
nucleus
cytoskeleton
ribosomes
endoplasmic reticulum
golgi apparatus
vacuoles
chloroplasts

2007-10-18 12:27:40 · 2 answers · asked by Linds11 5 in Biology

what is to
perform all indicated operations?

A rate in wich the second quanity in the comparison is one unit?

An eqaution that contains absolute-value expressions?

An equation that contains two or more varaibles?

2007-10-18 12:25:24 · 1 answers · asked by lala 1 in Mathematics

In Science class, we are studying sound, and the question came up about sounds that make your ears bleed. But the teacher hinted that it wasn't about volume, but frequency. so, do you have any information on it?

2007-10-18 12:20:31 · 3 answers · asked by Anonymous in Biology

2007-10-18 12:20:21 · 3 answers · asked by ashfly89 1 in Weather

It travels 60 m during this time.
a) What is the car’s average acceleration?
b) What is its initial velocity?
.

2007-10-18 12:18:33 · 2 answers · asked by navya 1 in Physics

Okay I know everyone is different and that but please, people who enjoy math,explain to me why on earth you like it and what it is about it you like so much?

2007-10-18 12:18:01 · 22 answers · asked by Anonymous in Mathematics

what do you think

2007-10-18 12:17:50 · 3 answers · asked by reagan m 1 in Earth Sciences & Geology

2007-10-18 12:16:41 · 1 answers · asked by monoman 1 in Biology

on the mayan calendar it said that 2012 will be the end of an era. i think a huge science discovery will happen and it will make the world a lot better. what do you think?

2007-10-18 12:16:07 · 33 answers · asked by dashiznits 2 in Astronomy & Space