Science & Mathematics - 8 September 2007

Same for an MP3 device:- will I use more of my stored rechargeable power if I like to listen to my music loud?

2007-09-08 16:13:12 · 3 answers · asked by knowetal 3 in Physics

Does it burn up in the atmosphere, land in the ocean, or does the government cover up the destruction of the poor house it landed on?

2007-09-08 16:10:17 · 10 answers · asked by Anonymous in Astronomy & Space

A=(3k,k-1) and B= (1,4) and AB = squareroot(34) and k>0.

find k

2007-09-08 16:07:43 · 5 answers · asked by Richard Boolean 2 in Mathematics

limit as x->0 of (x csc2x) / csc5x ??

2007-09-08 16:07:25 · 3 answers · asked by X16 3 in Mathematics

-35 - 6 is the numerator and the denominator is -4 my teacher got 41 as the numerator and 4 and the denominator but i think the answer is - 41 as the numerator and -4 as the denominator

2007-09-08 16:06:37 · 5 answers · asked by britt2fly 4 in Mathematics

The stretching force in a clothesline carrying a load of wash is appreciably greater when the clothesline is strung horizontally than when it is strung vertically. Why?

When you answer the question, please also explain WHY, because I don’t just want the answer, I also want to learn thanks! =)

2007-09-08 16:06:18 · 1 answers · asked by stop global warming!!! 1 in Physics

2007-09-08 16:03:19 · 2 answers · asked by David J 3 in Engineering

how do you solve this? What solution is it???

2007-09-08 16:00:56 · 6 answers · asked by Anonymous in Mathematics

I'm thinking about ways to terraform the moon. If we could set it rotating on an axis perpendicular to the surface of the Earth (it would spin the same way the hands of a clock turn, which means it would remain tidally locked to Earth as it is now), could we possibly spin it fast enough to produce synthetic gravity in order to help it sustain both human life and a noticable atmosphere?

2007-09-08 16:00:47 · 6 answers · asked by uncleclover 5 in Astronomy & Space

When sodium bicarbonate is strongly heated, it is converted to sodium carbonate, carbon dioxide, and water. Write a balanced equation for this reaction. What type of reaction is this?

2007-09-08 15:55:22 · 1 answers · asked by Pizza_Lover 2 in Chemistry

Aunt Minnie drops a penyy into a wishing well n it falls for 3 seconds before hitting the water. how fast is it going when it hits?

what is the pennys average speed during its 3-second drop?

how far down is the water surface?

u dont have to tell me the answer. but will u please tell me how to do it? thanks!!

2007-09-08 15:51:08 · 7 answers · asked by Anonymous in Physics

2007-09-08 15:49:41 · 9 answers · asked by Ron G 1 in Zoology

They say it is David Attenborough, but I didn't think it sounded like him. Any ideas?

2007-09-08 15:47:13 · 5 answers · asked by dmndvlc 1 in Earth Sciences & Geology

I'm finding myself stumped by this one, as I keep getting the wrong answer....how do you go about solving:

∫ x * e^(-x) dx = ?

Many thanks!

2007-09-08 15:46:27 · 2 answers · asked by netsurfer733 2 in Mathematics

find all solutions to the conditional equations in the interval (0,2π)
1. cos2X + cosX = 0
2. tan2X = tanX
3. cos2X - sinX = 0
4. sin2X + cosX = 0

2007-09-08 15:45:37 · 2 answers · asked by cigarette lighter 1 in Mathematics

An area of a piece of paper is 0.035475 m^2.
A second piece of paper is three-quarters as long and three-quarters as wide as the first paper. By what factor is its area less than the area found in the first.

2007-09-08 15:42:38 · 1 answers · asked by Sanyok 1 in Mathematics

help me solve this..you gotta use substitution =]

2007-09-08 15:41:45 · 10 answers · asked by Anonymous in Mathematics

A Porsche sports car can accelerate at 11.5 m/s^2. Determine its acceleration in km/h^2.

thanks alot

2007-09-08 15:39:09 · 4 answers · asked by Sanyok 1 in Physics

Anything that just completely shook you ....that was so surprising or weird??

2007-09-08 15:33:44 · 7 answers · asked by Anonymous in Physics

I have 2 questions that I am struggling with. I know the answer for them but I have no idea how to find the answer. So please tell me how to solve them.

1. Suppose you have the following six coins in your pocket : 5 cents, 10 cents, 20 cents, 50 cents, $1, $2. How many different sums of money can you make?
-Answer: 63 Sums

2. Find the smaller of 2^175 and 5^75 without a calculator.
- Answer: 5^75

Thank you!

2007-09-08 15:32:29 · 3 answers · asked by SiwooHasAnswers 2 in Mathematics

How long does it take the moon to move through an angle equal to its own angular diameter (1/2 a degree) against the background of stars? Is this based on the synodic or sidereal month? Why?

2007-09-08 15:31:59 · 3 answers · asked by ChEMIsTrY ChICkiE 1 in Astronomy & Space

I have just relized this. I was so scared when I saw that. What does that mean? And I know I'm not going insane. My entire eye color was black. Not the white part of the eye of course.

Please, someone tell me what this is. I'm so scared and confused and worried!

2007-09-08 15:31:30 · 11 answers · asked by tbuttercup25 1 in Paranormal Phenomena

how do we complete the following equations (an explanation plz)

co(h2o)6 2+ + cocl4 2-

and : cu(h2o)6 2+ + cucl42-

(six molecules of water with a 2+ charge. 4 molecule of clorine with a 2- charge)

2007-09-08 15:29:24 · 1 answers · asked by DeSeRT EaGLe 1 in Chemistry

using substitution..anyone know how to solve this?

2007-09-08 15:26:59 · 11 answers · asked by Anonymous in Mathematics

can someone please help me solve this??
i know it's not an extremely difficult problem, but it's on a quiz and we only get one try to answer it so i'd like to compare my answer with what someone else gets.

(4/x+3) - (1/x-3) = 4x/x^2-9

2007-09-08 15:26:40 · 4 answers · asked by Melanie 3 in Mathematics

Limit of [root of (h^2 + 4h + 5) - root of (5)] / h when h approaches to 0 ^ (-)

2007-09-08 15:24:58 · 2 answers · asked by Blesson 2 in Mathematics

2007-09-08 15:24:54 · 6 answers · asked by bgchese 1 in Medicine

as in pepsis formosa, the latin name of the tarantula hawk

http://en.wikipedia.org/wiki/Pepsis

2007-09-08 15:24:43 · 2 answers · asked by videogamer1988 1 in Zoology

I was watching that movie Dante's peak and saw that couple bathing in a hot spring and then there was some kind of volcanic activity and they got boiled alive. Can this really happen at a real hot spring?

Is it possible for lava to come bursting out of a hot spring or for the hot spring to change into a huge volcano?

I know it sounds silly but what really powers these natural hot springs?

2007-09-08 15:12:17 · 5 answers · asked by Anonymous in Earth Sciences & Geology

wats the diff, the textbook is confussing me with the two, becasue the teacher told us to use log base 2...and i used log base 10 ( direct imput into calculator - cos calculator is alwasy base 10 right?) and i STILL got the right answeer ...werid?

also can u use log base 2 on a calcualtor? or do u have to manually do change of base everytime?!?
THX!!! guys.

2007-09-08 15:09:26 · 9 answers · asked by Anonymous in Mathematics