Science & Mathematics - 30 November 2006

My physics project is something that has to launch a baseball and my idea was to make some sort of ballista/crossbow like weapon to launch it and instead of using a normal prod from a real crossbow as it would be too small in comparison to the size of crossbow/ballista i want to make, i was thinking of using a leaf spring from a car. Would this be a good alternative or are there any other materials i could use?

2006-11-30 01:19:39 · 10 answers · asked by Anonymous in Engineering

Was the Inventor of the first periscope an American called Thomas Doughty?someone called Gibbs?or someone else?

2006-11-30 01:14:17 · 3 answers · asked by ASHERS 1 in Engineering

2006-11-30 01:14:02 · 11 answers · asked by lady_t 1 in Medicine

it was

5a+3b=9 and 2a-3b=12

a=
b=

it has really been bugging me as i cn work them out a and b have to be the same in each equatuion

2006-11-30 01:13:08 · 23 answers · asked by plum 1 in Mathematics

For whatever reason I was trying to think if anything could consistently produce random results. Something that can be repeated over and over again, using exactly the same method, and have no pattern, no probability, ever emerge? Computers can’t do it. A roulette wheel will eventually start showing wear and favor certain numbers, the same thing with dice. Could there be something in nature? Just a thought. Thanks.

2006-11-30 01:12:14 · 5 answers · asked by Anonymous in Mathematics

2006-11-30 01:11:23 · 8 answers · asked by Danielle P 1 in Chemistry

The interior is so hot that is even capable of melting metals... lava.

2006-11-30 01:10:19 · 6 answers · asked by renatops 1 in Earth Sciences & Geology

2006-11-30 01:10:04 · 6 answers · asked by Danielle P 1 in Chemistry

2006-11-30 01:09:38 · 5 answers · asked by Anonymous in Mathematics

2006-11-30 01:06:57 · 8 answers · asked by Anonymous in Medicine

2006-11-30 01:04:52 · 7 answers · asked by hedZy ♀ The Dancing Banana 4 in Biology

2006-11-30 01:03:25 · 4 answers · asked by suleiman m 1 in Mathematics

When the battery goes down from 12.6 to 11 this comparator will send a signal or a 0 voltage so I can take that output to turn on a charger.
I you have any idea how to build this I will appreciate a lot, my company is in risk so with this I can help.
Thank you beforehand for your time.

2006-11-30 01:01:00 · 2 answers · asked by pap3030 2 in Engineering

2006-11-30 00:59:12 · 2 answers · asked by Anonymous in Chemistry

Best Invention for betterman of humankind.

2006-11-30 00:56:56 · 6 answers · asked by TG 2 in Engineering

2006-11-30 00:56:53 · 8 answers · asked by Riverghost 1 in Geography

i.e under which conditions.

2006-11-30 00:51:01 · 9 answers · asked by umang 1 in Chemistry

2006-11-30 00:44:12 · 7 answers · asked by Anonymous in Other - Science

2006-11-30 00:42:45 · 6 answers · asked by lahingesudraz 1 in Chemistry

2006-11-30 00:40:09 · 5 answers · asked by Anonymous in Chemistry

2006-11-30 00:38:34 · 9 answers · asked by championForever 2 in Earth Sciences & Geology

The Person with the most accurate and legthy Comparision and Contrasting will be given "The Best Anwser"

2006-11-30 00:38:25 · 2 answers · asked by David R! 1 in Geography

I want it for my assingments,these examples should be other than opening of flower buds and sleeping of animals.Thnx.

2006-11-30 00:37:15 · 2 answers · asked by Anonymous in Botany

2006-11-30 00:35:41 · 5 answers · asked by Anonymous in Physics

(lw - lwy)
lw

(lw minus lwy over lw.)

2006-11-30 00:35:38 · 11 answers · asked by me 1 in Mathematics

2 drops of AgNO3 were added to 4 drops of NaCl,white ppt formed,then 4 drops of KI were added to the above mixture,ppt changed to pae yellow,,why was therea colour change?????how does the colour change explain ksp values for AgCl and AgI ?
why is it when ionic product of a dissociating compound greater than the ksp value,,ppt forms or why when less than the ksp value ppt dissolves?????????

2006-11-30 00:35:06 · 2 answers · asked by mmmmmmmmm 1 in Chemistry

2006-11-30 00:33:55 · 13 answers · asked by dr.ameya 1 in Medicine

2006-11-30 00:32:47 · 2 answers · asked by are biyi 1 in Biology

2006-11-30 00:32:40 · 8 answers · asked by Anonymous in Mathematics

If it's a process of evolution, then surely retractable claws would be great for all beings. Gills would be useful, I could make great use of wings too. Why hasn't a being evolved with all of the good things?

2006-11-30 00:31:04 · 15 answers · asked by Anonymous in Zoology