Whoa, where did the wright quote link come from? (see previous post) Dont remember including it On 6/9/09, Tech List Kenya <techlistkenya@gmail.com> wrote:
Thanx all for your responses. Somehow skunks make learning fun.
On 6/9/09, Frankline Chitwa <frank.chitwa@gmail.com> wrote:
Your bottle became denser. The material compacted as Watson put it, they strech them and use less material in making the bottle. However, when you want a stronger bottel, you just do what you did :-)
On Tue, Jun 9, 2009 at 1:35 AM, Ashford Maina <kuriashford@gmail.com> wrote:
What's the obsession with vacuum's the bottles are not closed, pressure is same inside and outside, temperature is not. I second watson's description
The bottles are trying to regain original shape. {a pulp of plastic} rugged folding is because of un-even temperatures,
Sphere theory applies to where the pressure inside is higher than outside e.g. balloon,
Ashford K. Maina,
Steven Wright<http://www.brainyquote.com/quotes/authors/s/steven_wright.html> - "It's a small world, but I wouldn't want to have to paint it."
2009/6/5 Watson Kambo <wkwats@gmail.com>
Guys .. when they make the bottles they actually stretch them with heat,
initially its a small thing just like a balloon, so they brow hot air into it while placed in a preset mold, so if heat is applied later the bottle will tend to return to its original size...
2009/6/5 Simon Mbuthia <simon.mbuthia@gmail.com>
On a more serious note, there is this formula that shows the relationship between pressure, temperature and volume. According to the formula, volume and temperature are directly proportional to each other, with pressure being constant [http://is.gd/OZXk]. So I guess that should explain your problem. Otherwise you could think of it this way, when you blow air into a ballon, it grows in size. Does that man that you have latex in your lungs? I don't think it's the bottle that shrinks, but it's content - the water. When the water shrinks, it creates a vaccum in the bottle, which I believe is capped/corked. So air cannot get into the bottle to fill the vaccum, so atmospheric pressure presses on the bottle (or simply put, since the atmosphere is "sitting" on the bottle) it makes the bottlesqaush inwardly and look smaller.
That's my take.
Me.
2009/6/5 Simon Mbuthia <simon.mbuthia@gmail.com>
Maybe it evaporated, tee hee hee
2009/6/5 Steve Obbayi <steve@sobbayi.com>
> Basically the cumilative volume and weight of the bottle doesnt > change > at all. This is what happens. > As you pour your boiling water into the bottle it releases heat > energy > into the plastic that of course causes the plastic to turn into > fluid... now > the laws of physics... cant remember which one... anyway a body that > has > mass is always trying to change its shape to form a sphere assuming > its left > in a vacuum. > > only thing is solids find it quite hard to do that but fluids would > find it easier as their molecules are not tightly bound together. so > basically thats what the bottle is trying to do as it starts > melting. > > Now the bottle is also finding it hard to do it properly coz for one > as > the water loses its energy the temperature drops and as there is no > more > energy to keep the plastic melted it solidifies halfway during the > process > of trying to become a sphere... now at this point the bottle may > look > bent > out of shape and smaller in size but if you look closely you will > notice > that in some areas the bottle is thicker and more irregular than > others this > has compensated for the height lost. > > Finally the atmospheric pressure... as pressure inside the bottle > drops > coz the temperature has dropped, the bottle ends up being sucked > inwards to > balance it out with the external pressure. That is what is then > responsible > for the final shape of the bottle once it solidifies. > > Steve Obbayi, > > > > ------------------------------ > *From:* skunkworks-bounces@lists.my.co.ke [mailto: > skunkworks-bounces@lists.my.co.ke] *On Behalf Of *Peter Karunyu > *Sent:* Friday, June 05, 2009 9:38 AM > *To:* Skunkworks forum > *Subject:* Re: [Skunkworks] Of shrinking bottles > > Look at this way, if you put a plastic bottle in fire, it will > totally > melt and turn to liquid (sort of) thus structurally look totally > different > from the original bottle. When you put the hot water, you start this > melting > process, but the hot water cools down probably because of contact > with > air > and the process is halted. > > Like Shiro said, it must be the Highlands bottle uses a different > type > of plastic from the others, maybe one with a lower melting point. > > On Fri, Jun 5, 2009 at 9:23 AM, Shiro Njagi <sheeroh@gmail.com> > wrote: > >> plastic melts in high temperatures. >> I guess the Highlands bottle uses a type of plastic that is less >> resistant to heat than the other bottles. >> that's my take. >> >> On 6/5/09, Tech List Kenya <techlistkenya@gmail.com> wrote: >> > I have a question: >> > The other day I put hot - as in boiling - water into a plastic >> bottle >> > and it shrunk to almost half the size. >> > This happens especially with Highlands juice bottles, av tested >> > with >> > Quencher and empty Coke 2ltr bottle but they are not affected >> > much. >> > I mean a 1ltr bottle literally shrunk to 500ml. Where did the >> > rest >> of >> > the bottle go? >> > _______________________________________________ >> > Skunkworks mailing list >> > Skunkworks@lists.my.co.ke >> > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks >> > Other services @ http://my.co.ke >> > Other lists >> > ------------- >> > Skunkworks announce: >> > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce >> > Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science >> > kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general >> > >> _______________________________________________ >> Skunkworks mailing list >> Skunkworks@lists.my.co.ke >> http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks >> Other services @ http://my.co.ke >> Other lists >> ------------- >> Skunkworks announce: >> http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce >> Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science >> kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general >> > > > _______________________________________________ > Skunkworks mailing list > Skunkworks@lists.my.co.ke > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks > Other services @ http://my.co.ke > Other lists > ------------- > Skunkworks announce: > http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce > Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science > kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general > >
-- שִׁמְעוֹן
-- שִׁמְעוֹן
_______________________________________________ Skunkworks mailing list Skunkworks@lists.my.co.ke http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks Other services @ http://my.co.ke Other lists ------------- Skunkworks announce: http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general
-- Watson wanjohi kambo
_______________________________________________ Skunkworks mailing list Skunkworks@lists.my.co.ke http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks Other services @ http://my.co.ke Other lists ------------- Skunkworks announce: http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general
_______________________________________________ Skunkworks mailing list Skunkworks@lists.my.co.ke http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks Other services @ http://my.co.ke Other lists ------------- Skunkworks announce: http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks-announce Science - http://lists.my.co.ke/cgi-bin/mailman/listinfo/science kazi - http://lists.my.co.ke/cgi-bin/mailman/admin/kazi/general