Science & Mathematics - 23 October 2006

What diffrent types of acid are there how much of that acid is it made up of.

2006-10-23 08:01:03 · 2 answers · asked by nathan2484 2 in Chemistry

aperson that lived by the great swamp said that there are gelatinis
"creatures"that live there,is this true or is she pulling my leg?

2006-10-23 08:00:36 · 5 answers · asked by joefaz4338 1 in Biology

This is more of a scientific question than an obvious reason why (i.e. it might explode).

2006-10-23 08:00:05 · 7 answers · asked by yoyo 2 in Chemistry

Just a layperson but it seems there are two open questions that perhaps black holes could answer. I haven't read all the literature so this may be very naive: If black holes absorb everthing into a super dense singularity and now seem present at the center of galaxies, AND, if we don't yet understand the origin of the Big Bang, isn't it possible that these are connected? Couldn't Black Holes be the 'recycling' mechanism of matter from one universe to another?

2006-10-23 07:59:50 · 5 answers · asked by Anonymous in Physics

if a parachute exerts a force of 5000 newtons on an object that falls 500 meters is it positive or negative?

2006-10-23 07:56:05 · 3 answers · asked by Chris D 1 in Physics

2006-10-23 07:55:15 · 2 answers · asked by angie s 2 in Earth Sciences & Geology

We have found that if you submerse an egg in vinegar, that the calcium will be "eaten" away, leaving a rubber like "egg" behind. The problem is (as a Mom), how do we make this an interesting science project? Would the hypothesis have to do with acidity?
Should they try other substances and if yes, what would be good ones for me to have on hand?

I don't want to sound like I am doing this for my twin 8 year olds, and I expect them to carry out all of the experiments and develope their own theories, but the school has indicated that they could receive some outside help. Where could my kids find the necessary information to do a good job?

THANK YOU SO MUCH!

2006-10-23 07:55:00 · 5 answers · asked by coachls 4 in Other - Science

2006-10-23 07:54:07 · 2 answers · asked by angie s 2 in Earth Sciences & Geology

PLEASE ANSWER!!

2006-10-23 07:52:54 · 2 answers · asked by angie s 2 in Earth Sciences & Geology

2006-10-23 07:46:41 · 4 answers · asked by Anonymous in Astronomy & Space

2006-10-23 07:41:00 · 4 answers · asked by vinithmathewsimon 1 in Physics

2006-10-23 07:40:04 · 14 answers · asked by Eileen S 1 in Engineering

2006-10-23 07:39:35 · 44 answers · asked by breakthecycle69 1 in Astronomy & Space

ice?

2006-10-23 07:39:25 · 11 answers · asked by otto4423 1 in Botany

2006-10-23 07:38:57 · 12 answers · asked by yoyo 2 in Chemistry

2006-10-23 07:38:35 · 7 answers · asked by daredevil_archit 1 in Chemistry

2006-10-23 07:31:29 · 22 answers · asked by Anonymous in Mathematics

i tried and when i press the percentage sign the numbers go clear

2006-10-23 07:28:12 · 12 answers · asked by jesse 2 in Mathematics

2006-10-23 07:26:54 · 4 answers · asked by lily 1 in Chemistry

Four railroad cars, each of mass 2.15 X10^4 kg, are coupled together and coasting along horizontal tracks at speed vi toward the south. A very strong but foolish movie actor riding on the second car uncouples the front car and gives it a big push, increasing its speed to 4.35 m/s south. The remaining three cars continue moving south, now at 2.40 m/s.

The inital speed of the cars is 2.89 m/s
How much work did the actor do in J?

2006-10-23 07:26:12 · 1 answers · asked by activegirl 1 in Physics

please help

2006-10-23 07:25:31 · 4 answers · asked by montoya162001 1 in Biology

I want to learn from scratch.Give me complete versions of free E-books.It would be useful if they r written in a simple language.

2006-10-23 07:25:06 · 2 answers · asked by coolguy 1 in Engineering

Is all of our technology and medicine actually make humans as a species weaker....if we lose all of that could we survive? I hear that people who take medicine for every little thing, acutally have weaker imune systems that people who allow thier body to do the work itself....Most species will weed out the weaker animals in some way shape or form....are our morals helping or hurting the species, and would only allowing the stronger smarter people breed actually be a benifit for the species...and one final thought. All the domestic animals we raise..we only want to breed for the improvement of the breed(dogs, cows, etc..)...why do most people think this is bad for people....Your thoughts please...

2006-10-23 07:24:25 · 7 answers · asked by yetti 5 in Biology

a friend from school farted into a jar and put the lid on it, 5 years ago. the purpose of this was to see if it would still smell in 5 years time. (he was bad for letting off stinkers). but someone stole the jar at a party at his house last weekend so we don't know if it worked. didn't really care before but am now curious. any ideas?

2006-10-23 07:23:43 · 8 answers · asked by Anonymous in Biology

When an aircraft is descending is left reduced and drag increased, please can some check my figures. :)?
a340 at -2degrees angle of attack
wing area 5825ft squared
density ratio= 0.5328
speed 435knots
altitude; 20,000ft
I worked lift out to be
Lift = -559,819.26 pounds
and drag to be
Drag = 43,797.82 pounds

do these sound right, if not can you tell me how to do the coefficient for descening of an aircraft for the values of lift and drag??

2006-10-23 07:20:20 · 1 answers · asked by louj j 1 in Engineering

Is it because of the current, or the voltage ?

2006-10-23 07:16:36 · 8 answers · asked by dragoneye_2005 1 in Physics

You have set up an ordinary annuity that will pay you $650.00 a month for the next 25 years. You will earn interest at a rate of 5.5% compounded monthly. What amount did you invest to accomplish this goal?

2006-10-23 07:16:05 · 4 answers · asked by lostinmath 1 in Mathematics

2006-10-23 07:14:57 · 8 answers · asked by jsjmlj 5 in Astronomy & Space

2006-10-23 07:14:20 · 8 answers · asked by Smiley22 1 in Mathematics

2006-10-23 07:13:49 · 6 answers · asked by Anonymous in Chemistry