Science & Mathematics - 26 September 2006

My question deals with a balence beam.
Lets say I have a huge cement slab that hangs down verticaly 8ft exactly from the pivot point. The balence arm is 25ft long and has a weight which can slide from tip to pivot point. This cement slab weighs lets say 5,000lbs and the sliding weight is unknown, "X".

Does the fact that the cement slab hangs well below the pivot point acting as a type on lever the moveable weight now has to work against effect the equation?
MxD=MxD is now MxD=MxDxL
M=mass D=distance L=leverage

I have uploaded a picture of what I mean to my forum...
It can be viewed here...
http://www.secrets2flight.dfuzed.org/forum/viewtopic.php?p=9#9

What kind of equation would I use if my guess was wronge???
I am guessing leverage has something to do with it, but I have not gotten the chance to take highschool physics yet.

2006-09-26 20:26:31 · 3 answers · asked by uriahgeorge 1 in Physics

5 ⤊

how much is a billion and trillion?

i am not clear as to how much is a billion and trillion. some say that in US billion is 10 raised to power 9 whereas in other countries it is 10 raised to power 12. similarly trillion. is it 10 raised to power 15 or 18? is it not confusing if different countries adopt different values for the same thing.

2006-09-26 20:20:55 · 15 answers · asked by hiteshi n 1 in Mathematics

0 ⤊

do u know what is demography?

wat is the relation between geography,ecology and ecosystem?

2006-09-26 20:13:35 · 4 answers · asked by Anonymous in Geography

0 ⤊

Why do we never see 3 balls move away like that of the 2 balls when being collided?

2006-09-26 20:05:23 · 3 answers · asked by kris 1 in Physics

2 ⤊

Need size of a cylindrical can, able to contain 1/2 litre drink, maufactured from aluminum, volume is 500cm3?

I'm desperate cuz this is needed to pass 8th grade! Please help me...

The teacher made us write a page that has radius/height/surface area/volume across the top, and I need a combo for the 20 (increasing) radius beginning with 0.5 and graduating to 10.0. The vol. 499.95-500.5. THANK YOU VERY MUCH!

Here are tips:

Need to find the radius and height of the can which will use the least aluminum,(ie: find out how to minimise the surface area of the can).
WHAT SHAPE IS YOUR CAN? DO YOU KNOW OF ANY CANS WITH THIS SHAPE?
Let the radius of the can be r cm, and the height be h cm. Write down algebraic expressions which give:
-the volume of the can
-the total surface area of the can, in terms of r and h. (Remember to include the two ends!)

Using the fact that the volume of the can must be 500 cm3, -you could either try to find some possible pairs of values for r and h (do this systematically if you can). -for each of your pairs, find out the corresponding surface area.

2006-09-26 20:04:41 · 5 answers · asked by LuckyEddie 4 in Mathematics

1 ⤊

Are you Awake??

Are you awake 9/11 was an inside job?

Who flew the planes if 9 hijackers turned up alive?
How did a plane hit the pentagon if its over 100' wide and only made a 16' hole?
Why were the engines of the plane missing if they are made of steel and titnium with a combined weight of 12 tons, and stell and titnium has a melting point of 2700F, with the fire less then 1400F
Why was thermite dripping from the towers, How did it get there?
Why was there a 1200% Increase in AA put contracts on 9-10-01
Why was all the evidence sold to china before anybody can invegigate?
How did the cell phones work so well at such a high attitude?
Why was william rodreiez, a janitor in the building, offered millions of dallors to shut up, and to not tell people he saw bombs explosing in the basement?
Why did the towers fall at the speed of gravity?
Why did Larry Silverstein admit Blowing up WTC7?

http://www.infowars.com
http://www.myspace.com/conspiracyalert
Click "9/11 Done by the US GOVT"

2006-09-26 20:02:07 · 8 answers · asked by infowars.com 1 in Other - Science

0 ⤊

how many liters to a gallon?

2006-09-26 20:01:47 · 6 answers · asked by liljimis 3 in Mathematics

0 ⤊

Define what a tangent line is.?

Think about it a bit before you try to answer please.

2006-09-26 19:42:47 · 10 answers · asked by Anonymous in Mathematics

12 ⤊

does your ears grow bigger with age?

2006-09-26 19:42:05 · 16 answers · asked by sburg05 1 in Other - Science

0 ⤊

meaning of "trochoid" in english dictionary & in mathematics dictionary?

meaning of "trochoid" in english dictionary in daily life

2006-09-26 19:39:44 · 3 answers · asked by Babar Ali 1 in Mathematics

0 ⤊

2 solids a &b of density 2.5g/cm3 and 0.80g/cm3 are placed in a liquid of density of 1.2g/cm3.?

which body will sink and which body will float? why?

2006-09-26 19:39:07 · 2 answers · asked by Anonymous in Physics

0 ⤊

is there a love is this world now? partner whose sincere, no two-timing?

2006-09-26 19:35:21 · 6 answers · asked by nicole 1 in Chemistry

0 ⤊

So, how much wood would a would chuck chuck if wood chuck could, in fact, chuck wood, anyway?

2006-09-26 19:32:06 · 9 answers · asked by KSR 2 in Zoology

0 ⤊

A body weighs 500g in air & 300g in water. Caculate1.upthrust 2.volume of the body3.relative density of solid?

2006-09-26 19:30:44 · 3 answers · asked by Anonymous in Physics

0 ⤊

Show that harmonic functions are infinitely differentiable.?

2006-09-26 19:30:37 · 5 answers · asked by Anonymous in Mathematics

0 ⤊

can magnetic propultion fuel an alcohol and water solution unto propetual motion?

based upon a constant circular motion using the pressure built from the the alchohol boiling at a much lower temp than the water creating steam which in turn will create an anti gravial force, which disrupts the magnetal force and agitate the polaririty, and therefor create the low heat require to boil the alcohol, and still leave the water as a constant?

2006-09-26 19:28:02 · 3 answers · asked by bog_blasted 1 in Physics

1 ⤊

what is the reason of the time difference between the different countries?

this has got to do witht he equator, the troics of both cancer and capricorn please.

2006-09-26 19:24:04 · 15 answers · asked by Anonymous in Other - Science

0 ⤊

When are you most comfortable?

Where are you, what position are you in, are you with anyone, what are you doing?
(Sleeping doesn't count!)

2006-09-26 19:18:23 · 8 answers · asked by Bright Eyes 4 in Physics

0 ⤊

Help on Atoms!?

in an atom, how is the electron, neutron, and proton amount determined?

and what does it mean when you have something like

Mg 2+ does that mean it has 2 extra protons? But if the # of protons equals the atomic number (12), then why does it have 12 protons, 10 electrons, and 12 neutrons? why did the protons stay the same but the electrons decreased? or am i doing this wrong?

2006-09-26 19:15:42 · 6 answers · asked by Sminty 2 in Chemistry