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  #51  
Old Monday, July 13, 2009
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Young modulus does not tell about the elasticity of substance >>>
But it states the stiffness which means rigid , inflexible and hard to bend .
of matter.

& you represented the values of stiffness of rubber and steel
such are

Rubber = .1 - .01 GPa
Steel = 200 GPa

so in your point of view diamond is more elastic than both of them ...

whose value is
Diamond = 1220 GPa
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  #52  
Old Monday, July 13, 2009
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Quote:
Originally Posted by bunko
Young modulus does not tell about the elasticity of substance
But it states the stiffness which means rigid , inflexible and hard to bend .
of matter.
Then how do we define elasticity and how do we measure it ?

Elasticity is a measure of how well a material returns to its original shape and size i.e. it is the ratio of stress over strain. It does not mean how 'flexible' a substance is or how much it can be stretched.

And the Young's Modulus measures the resistance of a material to elastic (recoverable) deformation under load. So keeping in view the definition of elasticity, we can say that Diamond is more elastic than both of them, i.e. it has more ability to resist the elastic deformation and return to its original shape.

Quote:
Originally Posted by bunko
so in your point of view diamond is more elastic than both of them ...

whose value is
Diamond = 1220 GPa
Yes, you got it right
Diamond is more elastic than both of them

Que. No. 9 Page 308
http://books.google.com.pk/books?id=...esult&resnum=1

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  #53  
Old Tuesday, July 14, 2009
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Elasticity = The ability of a solid to return to its original shape or form after being subject to strain.
i do not know its measurement
you are only talking about theoretical .. just give me one practical example?

well in my mind still gobs of questions arise ...
a interesting one :P
so why don't we use steel in our trousers or make a world most expensive trouser by using Diamond ?

"Elasticity is a measure of responsiveness. The responsiveness of behavior measured by variable Z to a change in environment variable Y is the change in Z observed in response to a change in Y. Specifically, this approximation is common:

elasticity = (percentage change in Z) / (percentage change in Y)

The smaller the percentage change in Y is practical, the better the measure is and the closer it is to the intended theoretically perfect measure."
Last edited by Last Island; Tuesday, July 14, 2009 at 11:31 PM.
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  #54  
Old Tuesday, July 14, 2009
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Originally Posted by bunko
"Elasticity is a measure of responsiveness. The responsiveness of behavior measured by variable Z to a change in environment variable Y is the change in Z observed in response to a change in Y. Specifically, this approximation is common:

elasticity = (percentage change in Z) / (percentage change in Y)

The smaller the percentage change in Y is practical, the better the measure is and the closer it is to the intended theoretically perfect measure."
This is not the elasticity we are talking about. This definition is for the concept of elasticity in Economics.

Quote:
Originally Posted by bunko
you are only talking about theoretical .. just give me one practical example?

well in my mind still gobs of questions arise ...
a interesting one :P
so why don't we use steel in our trousers or make a world most expensive trouser by using Diamond ?
You are still confusing elasticity with flexibility, ability to get stretched etc.
that is why you are seeing difference between theory and practice. go through the definition of elasticity again, It's nothing what you think it practically is.
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  #55  
Old Sunday, August 09, 2009
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for everday science objective no.9
which is not the part of the darwinism....
it is the inhertance of the acquired characters
the theory of the inhertance of acquired characters was given by lamarck
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  #56  
Old Tuesday, August 11, 2009
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dear you did a really marvellous work. thanks for sharing it. May Allah Almighty bless you.
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  #57  
Old Thursday, August 20, 2009
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Q. 8. v. Why has pasteurized milk more nutrition than ordinary boiled milk?

All milk on the market unless labelled "raw" is pasteurized. I don't believe there is boiled milk on the market. The pasteurization process however, heats the milk up to 161 degrees for about 15 seconds by squeezing it through hot pipes.
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  #58  
Old Monday, October 19, 2009
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Exclamation universal reciepent
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Dear i think the universal receient is O+....its according to my thinking can any body confirm it
i think in my veiw it ab+.
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  #59  
Old Monday, October 19, 2009
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Default o -ve
o -ve is universal recipiant
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  #60  
Old Monday, October 19, 2009
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Default ordinary boild milk boiled at 100 celcius which lose
ordinary boild milk boiled at 100 celcius which lose many vitamins and protein while the pasturise milk at 72 celcius (confirm plz) for 15 seconds so it have much more preserved vit. than the other.
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