physics ?

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Re: physics ?

Post by cato » Thu Sep 25, 2003 3:49 am

<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by dribach:
as several people here had mentioned and several people (in some cases the same ones!) had failed to keep in mind, if the ice cube is traveling in a vacuum, it will NEVER melt.<hr></blockquote><p>
Hey!...I kept it in mind (I said "might" didn't I?). I just didn't put in in writing. :-)<p>anyway:<p>Some say the world will end in fire,
Some say in ice.
From what I've tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice
Is also great
And would suffice.<p> -- Robert Frost

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Re: physics ?

Post by Bernius1 » Thu Sep 25, 2003 5:03 am

Assuming your original idea, and the preceding posts, the inertia AND the negative thermal energy of the ice are mechanical and heat. Adding heat to melt the ice ( say, in a microwave oven in a vacuum) INcreases the net kinetic energy. The vapor would now need to be decelerated (adding a reverse vector to the inertia). Is it a theory question, or are you thinking of stopping a metal or particle projectile ? There would be a world of difference, because water is less affected by electro-magnetic forces.
Can't we end all posts with a comical quip?

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Re: physics ?

Post by dribach » Thu Sep 25, 2003 5:09 am

hehe as you can see, rick, i got the spanking right back. :)

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Re: physics ?

Post by haklesup » Thu Sep 25, 2003 12:43 pm

Acording to the State Phase Diagram for Water Liquid water does indeed not exist when the pressure is 0. see the lower left corner of the diagram.

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Chris Smith
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Re: physics ?

Post by Chris Smith » Thu Sep 25, 2003 11:19 pm

All other assumptions aside, water melts into a liquid, before it vaporises. Even if its a molecule by molecule layer of liquid, before it disapates.

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Re: physics ?

Post by Dimbulb » Thu Sep 25, 2003 11:51 pm

I think the bond angle in liquid water H^H should tighten while as it approaches steam. The surfaces between H2O molecules are weaker and become more distant. The contracting trilobal entities on the surface would be tighter and more pronounced at so thermal conductivity exchanges exo away from the cold center.

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Re: physics ?

Post by ampedtech » Fri Oct 03, 2003 4:25 pm

I can’t help it, I feel compelled to make a contribution here. This is for all of you that don’t know physics, but it’s also for all of you that do!<p>Take a LARGE tumbler fill it with really cold ice pour your favorite liquor over the ice until the glass is almost completely full. Now drink the entire glass. Repeat this process till true understanding invades.
:p :p :p :p :p :eek:

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