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alshaymah
Jun 18, 2007, 04:11 AM
A steel is much denser than Water. In view if this fact, how do steel ships float?

Curlyben
Jun 18, 2007, 04:13 AM
Errrrm, how about the fact they are full of air.
This will dramatically add to their buoyance.

Capuchin
Jun 18, 2007, 04:24 AM
As Curlyben points out, a boat's average density is less than that of water, thus it floats.

alshaymah
Jun 18, 2007, 04:29 AM
Curlyben
Thank you


Capuchin hi again my friend

So the ships less dinser because they are from outside made of steel

But from the inside full of air.

Capuchin
Jun 18, 2007, 04:35 AM
Yes. Exactly.

You should see that

\frac{\rho_{steel}V_{steel}+\rho_{air}V_{air}}{V_{ total}}<\rho_{water}

i.e. the average density of the ship is less than the density of the water.

Therefore it floats!

alshaymah
Jun 18, 2007, 04:46 AM
Oh feel tired I just came from the uni :(
I can't even think right now
I will have some sleep
Then I will think in this problem.

I have the same question:

A tennis ball is made of Rubber that has a density greater than that of water.
However, a tennis ball will float on water. Explain why?


Thanx:o

Capuchin
Jun 18, 2007, 04:48 AM
Heh, well, I'll leave you to think about that one. If you come up with an answer, then put it here and I'll happily tell you if you're right or wrong :)

Curlyben
Jun 18, 2007, 04:48 AM
AIR again ;)

Capuchin
Jun 18, 2007, 04:50 AM
Bah curly...

Curlyben
Jun 18, 2007, 04:50 AM
Sorry we posted at the same time ;)

Capuchin
Jun 18, 2007, 04:55 AM
You just like being right :p

alshaymah
Jun 18, 2007, 11:04 AM
:D hi am wake and full of energy.

Well my last answer will be that the ship or the ball are made from the outside from steel
( or rubber) but from the inside they are cavernous and fall of air.Therefore, they are
Bacome less denser then the water's density and the float.

:p

Curlyben
Jun 18, 2007, 11:47 AM
Hey monkey, you know I think they're getting it ;)

alshaymah
Jun 18, 2007, 01:25 PM
http://bp1.blogger.com/_5JXA17H-suo/Rg_Q7d0LlzI/AAAAAAAAAFk/LgKnR4DfLLg/s400/cute.bmp <<<<<<<<Angry from the techear :D