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Cynthia Bui 2H
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Joined: Fri Sep 29, 2017 7:05 am


Postby Cynthia Bui 2H » Thu Feb 01, 2018 10:11 am

Would an insulated lunchbox be an isolated system? Curious because I misread the test question as a "pack" being a lunch pack/box instead of an... actual cold pack. Whoops.

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Re: Lunchbox?

Postby Sarah_Stay_1D » Thu Feb 01, 2018 11:14 am

A cold pack would be a closed system. It can exchange energy with the surroundings in the form of heat, but it can not exchange matter.

Magdalena Palavecino 1A
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Joined: Fri Sep 29, 2017 7:04 am

Re: Lunchbox?

Postby Magdalena Palavecino 1A » Thu Feb 01, 2018 4:37 pm

Hi! I guess the lunchbox, if it is completely sealed and no matter was taken from its inside it could be isolated? As long as no matter and energy are lost then it would be.

Charles Ang 1E
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Lunchbox?

Postby Charles Ang 1E » Fri Feb 02, 2018 1:54 pm

A lunch box would be an attempt at an isolated system, though in practice it is not. If it were on a test, I believe they will make it clear that they mean a very insulated lunch box or not.

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