Science & Mathematics - 11 August 2007

does the output voltage from a microphone vary according to the decibel of sound i/p ? does it vary with the size of diaphragm? ,what is the typical output voltage from a microphone ? will it be anough to power a device? pls give me the link

2007-08-11 23:56:05 · 2 answers · asked by jeeva_somasundaram 2 in Engineering

2007-08-11 23:55:09 · 4 answers · asked by Udawg 1 in Chemistry

options 1. mars 2. venus 3.jupiter 4. saturn

2007-08-11 23:55:03 · 1 answers · asked by TINOO M 1 in Other - Science

2007-08-11 23:54:57 · 7 answers · asked by narendra a 1 in Engineering

2007-08-11 23:54:13 · 5 answers · asked by Christopher G 1 in Engineering

2007-08-11 23:40:32 · 5 answers · asked by Sonu 2 in Astronomy & Space

can u explain whats the diff. between rest mass and moving mass?
do gamma rays have kinetic energy?

2007-08-11 23:29:56 · 6 answers · asked by kkkareeem 1 in Physics

2007-08-11 23:28:07 · 10 answers · asked by Anonymous in Earth Sciences & Geology

hi am a engineering goods exporter from india, i would like to read book or article about hardening and blacking of metal parts, any one help me in this

2007-08-11 23:24:51 · 2 answers · asked by shan_velu2000 1 in Engineering

hi where almost thru w/ this...
can you name
Pb(C2H3O2)+K2CrO4 ----->PbCrO4+KC2H3O2

Is Pb(C2H3O2) ... Plumbum acetate....


BALANCING....
Ba(OH)2 + CO2 ------->BaCO3 + H2O
=WHAT????????


im always confuse what haappens to OH bcoz it turns to H2O
is this right..

2Ba(OH)2 + 3CO2 ------->2BaCO3 + H2O

but O of H2O is not balance w/ O of OH..
How do you make it simpler????

Thank you...

2007-08-11 23:23:53 · 2 answers · asked by Anonymous in Chemistry

Where did the universe come from? Don't tell me god created it cause I don't believe in any of that. I understand how the planets and sun came to be. But what are some theorys on when and how the universe even came into existance?

2007-08-11 23:18:28 · 15 answers · asked by v.e.n.d.e.t.t.a 2 in Astronomy & Space

I am doing a project on electronic baton.I want it to look exactly like baton used by professional orchestra conductor.I stored the electronic components inside the handle of the baton.The problem is the space is very limited.The maximum diameter of the handle only about 18 mm.I need to choose a battery that also stored inside the handle.I want the battery that could work for long time.However what I can see the coin battery that is small only have small energy in it.It will only last for less than 1 hour.It is not good for new product.What can I do to maximize amount of energy so baton can work for longer time? ideally 10+hours or minimum of 5 hours and can fit inside small handle.I dont want to use external power cable.Hope you guys can help me.Really appreciated all of your helps.

2007-08-11 23:16:43 · 3 answers · asked by Ikmal 1 in Engineering

2007-08-11 23:14:49 · 6 answers · asked by Peter V 5 in Physics

What is it's specific gravity?

What is it's density?

2007-08-11 23:12:44 · 4 answers · asked by ? 3 in Mathematics

2007-08-11 23:07:35 · 10 answers · asked by Munchen 1 in Mathematics

where does it go from there?? Is it something like quadrillion?
Can someone tell me all the units of counting as far they go?

I once read somewhere (I think it was Scientific American..) that there's a word that can be used to count all the spoken words since humans begin talking. So I'm guessing that's like 10 to the 400th power or something. I know googol means 10^100, but that's the largest I know, and I don't know anything between that and trillion.

HELP ME~~

2007-08-11 23:03:53 · 18 answers · asked by Jai K 1 in Mathematics

a.perspiration evaportaing
b.peanut brittle hardening
c.snow turning into water
d.aspartame, a sugar substitue, decomposing when heated
e.sodium metal in contact with chlorine emitting a bright light.
f.making ice cream from sugar and cream
g.dew forming on plants
h.trinitrotoluene explodeing when heated

2007-08-11 23:03:53 · 6 answers · asked by Pradeep k 2 in Chemistry

what is the time where you??

and what time do you think it is where i am??

2007-08-11 22:59:35 · 16 answers · asked by Anonymous in Geography

2007-08-11 22:58:56 · 10 answers · asked by ? 3 in Engineering

gas

2007-08-11 22:57:02 · 4 answers · asked by saleh a 1 in Engineering

2007-08-11 22:50:32 · 2 answers · asked by spaceage boy 1 in Chemistry

If I made such a thing, how could get credit for it without patenting it?

Note:Yes I know it is impossible, however, this question is not about free energy or any bogus like that...

2007-08-11 22:49:01 · 8 answers · asked by worried person 1 in Engineering

Then how big would this boat have to be of been in length,width,height?

2007-08-11 22:48:29 · 17 answers · asked by colin050659 6 in Other - Science

Are the minerals and vitamins in Mineral Water Inorganic?

I've heard that the minerals are inorganic, and is not suitable for the body. Is this true?

2007-08-11 22:43:35 · 2 answers · asked by KCWS 2 in Chemistry

THIS IS THE SPECIFICATION OF LIGHTING FIXTURES RECESSED TYPE

2007-08-11 22:41:05 · 1 answers · asked by wroustom75 1 in Engineering

The velocity of a skydiver t seconds after jumping is given by
v(t)= [-(32/k)^1/2] x [(1-e^2t((32k)^1/2)) / (1+e^2t((32k)^1/2))]]
in meter/second, where k is a constant that depends upon the size and shape of the object and the density of the air. Find the therminal velocity with k=0.00064 and k=0.00128

2007-08-11 22:32:04 · 1 answers · asked by pitate d 1 in Mathematics

So each one of them contributed Rs.25 and paid the amount to the waiter who gave the cash on the counter. But the restaurant owner gave a Rs.5 discount. Of this amount the waiter pocketed Rs.2 and and distributed Rs.3 by giving each one of them Re.1. So by this logic each of the friends contributed Rs.24 making a total of Rs.72 and Rs.2 are with waiter. So where did the Re.1 go out of a total of Rs.75??

2007-08-11 22:19:28 · 9 answers · asked by Anonymous in Mathematics

2007-08-11 22:18:01 · 19 answers · asked by Anonymous in Astronomy & Space

contracting again?

2007-08-11 22:16:35 · 5 answers · asked by Anonymous in Astronomy & Space

what would you do?

I thought of tossing up a mirror some grandiose distance from the earth and accelerating the light back to us so that we could observe objects as they once were/began.

2007-08-11 22:12:18 · 3 answers · asked by Anonymous in Astronomy & Space