Science & Mathematics - 14 October 2007

I tried to figure it out but keep getting the wrong answer if anyone out there can show me step by step how to solve this problem I would greatly appreciate it.

2007-10-14 14:47:19 · 1 answers · asked by Nikki C 1 in Chemistry

We haven't learned this yet and our textbooks don't explain it. But yet, this is on our hw. And I can't find how to do this on google. HELP!!!!! Thanks for any info!!!

2007-10-14 14:46:34 · 3 answers · asked by Anonymous in Mathematics

Then everyone would come to paris to see the giant cable stretching up into and dissapering into the sky! That'd be cool!
Mabye someone would even try to climb it to the moon! (in a spaceman suit, theye'd have to be super buff!)
Uhoh! What happens when the moon orbits, though? Would the cable break, or would the eifel tower be carried up into space, or just be dragged along the ground around the world?

2007-10-14 14:44:12 · 24 answers · asked by Anonymous in Astronomy & Space

Please help

2007-10-14 14:42:50 · 3 answers · asked by Anonymous in Mathematics

2007-10-14 14:40:43 · 11 answers · asked by Anonymous in Mathematics

If a man stood in a large container which was on a scale and the scale showed that the total weight of the container and the man was 250 pounds (the man weighs 175 pounds) .....what weight would register on the scale while the man jumped up in the air? (during the time he was up in the air). Please explain your answer.

2007-10-14 14:39:45 · 6 answers · asked by me 1 in Physics

2007-10-14 14:39:41 · 3 answers · asked by Anonymous in Geography

A galvanometer with a coil resistance of 11.0 and a full-scale current of 0.160 mA is used with a shunt resistor to make an ammeter. The ammeter registers a maximum current of 4.00 mA. Find the equivalent resistance of the ammeter. ____ Ohms

2007-10-14 14:39:13 · 3 answers · asked by Hera08 1 in Physics

Can someone check my answer for this question:
Find the directional derivative of f(x,y) = x/(x+y) at P(1,0) in the direction of Q (-1,-1).
Ok so the answer I am getting is 1/sqrt(2) but the answer at the back of my book is 1/sqrt(5). I have rechecked all my workings but still can't get the solution which matches the answer in the book. Can someone tell me if the answer I got is right...thanks :):):)

2007-10-14 14:36:41 · 2 answers · asked by Anonymous in Mathematics

travel that 30 miles at 24 mph, what did he do wrong, what should the correct answer be and why! WORTH 10 well earned points.

2007-10-14 14:34:44 · 3 answers · asked by Anonymous in Mathematics

In terms of thermal expansion, why is it important that a key and its lock be made of the same or similar materials?

2007-10-14 14:32:37 · 1 answers · asked by nancy c 1 in Physics

2007-10-14 14:30:51 · 4 answers · asked by hobo 7 in Zoology

How do you solve this guys and girls help me.

Radical 98x^3 / rad 2x

If anyone can help me with this problem i will appreciated ♥

2007-10-14 14:30:09 · 4 answers · asked by HEy 3 in Mathematics

like x^3+8? and can you explain how you got it? Is there a specific way for factoring expressions with a cubed exponet?

2007-10-14 14:28:53 · 5 answers · asked by yellowducks 1 in Mathematics

can that really happen?

If you havent heard of the lucifer project then heres a video explaining it

http://www.youtube.com/watch?v=yRi7Vd9zTSE

2007-10-14 14:28:42 · 8 answers · asked by Anonymous in Astronomy & Space

(x^2n-3)(x^2n+3)

find the product please

2007-10-14 14:28:36 · 5 answers · asked by Kelly S 1 in Mathematics

4(4 - w) = 3(2w + 2)

9(4b - 1) = 2(9b + 3)

2007-10-14 14:23:41 · 7 answers · asked by Anonymous in Mathematics

when people are being very vague and they reach me at the Big Y. what is it

2007-10-14 14:21:55 · 3 answers · asked by Robert H 1 in Astronomy & Space

2007-10-14 14:21:52 · 2 answers · asked by Luis V 2 in Chemistry

OK so I have one question for my upcoming math test that is in 48 hours. So I shift into PANIC mode and start stressing and freaking as I have.

MY QUESTION
what is the difference between (-2)^4 -2^4???
[negative two to the fouth power]

i know (-2)^4 equals +16 and -2^4 equals -16
BUT WHY


PLEASE GOD IF YOU KNOW THE DIFFERENCE,
...tell me...
very desparate.
THANK YOU

2007-10-14 14:21:32 · 19 answers · asked by ikb<3 2 in Mathematics

I'm trying to figure out where I might want to look for a career, I'm a pretty liberal person.

2007-10-14 14:20:04 · 6 answers · asked by runofthemill 4 in Geography

Given that y = In ( 1 + 4x / 1 - 4x) and that dy / dx = k / (1 - 16x^2), find the numerical value of k.

Hence, find the equation of normal to the curve at the point where x = 1/5

2007-10-14 14:19:11 · 1 answers · asked by ♪£yricảl♪ 4 in Mathematics

2007-10-14 14:16:09 · 3 answers · asked by nita s 1 in Mathematics

http://tinypic.com/view.php?pic=2cpyl9v&s=2 (Those are the problems)

http://www.themathlab.com/toolbox/geometry%20stuff/trigratios.htm

1) Use the table of trig. ratios to find the m angle A correct to the nearest degree.

2) Use the table of trig. ratios to find the m angle B correct to the nearest degree.

3) Use the table of trig. ratios to find y correct to the nearest integer.

THANKS FOR ANY HELP!

2007-10-14 14:15:08 · 2 answers · asked by Anonymous in Mathematics

2007-10-14 14:11:34 · 1 answers · asked by heather s 1 in Engineering

2007-10-14 14:10:25 · 5 answers · asked by shoreke 1 in Zoology

use the terms biotic and abiotic

2007-10-14 14:09:16 · 3 answers · asked by Anonymous in Zoology

If so, when I am looking at a periodic table, how do I figure out what their numbers are?

2007-10-14 14:07:14 · 3 answers · asked by blah 6 in Other - Science

A spring with spring constant k = 60 N/m and unstretched length of L0 is attached to the ceiling. A block of mass m = 1 kg is now hung on the end of the spring and is gently lowered.

a) How far does the spring stretch?

A chemistry student now pulls the block down until the total amount the spring is stretched is twice the amount found in part (a).
b) Assuming the mechanical energy of the block to be zero when the spring is in its unstretched position, what is the potential energy of the block when it is held in this new position?

c) What is the total mechanical energy of the block when it is this new position?

The block is now released and pushed upward with an initial speed vi = 2 m/s. d) What is the maximum speed of the block?

pic: https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/Phys1201/fall/homework/Ch-08-Energy-Conservation/mass_vertical_spring/vertical-spring.jpg

2007-10-14 14:00:09 · 2 answers · asked by Anonymous in Physics

2007-10-14 13:56:15 · 5 answers · asked by Chestudent 2 in Chemistry