Because nothing is going in or out until u open it
No.
The base word for unopened is "open."
Explain why an organism is considered an open system.
open
an organism
Do you believe that Apple Inc.Functions as an open system?
no
The pedosphere is considered an open system because new organic matter and old rocks are and will be decaying for years to come.
This might depend on a) what is in the cans b) how accurate the scales are If a can with liquid in it is left open overnight some moisture may be lost by evaporation - making it slightly lighter than the unopened can. If a can is open, some particles of dust might drift into it - more than would settle on an unopened can - and make it slightly heavier than the unopened can. However, If the can has nuts in it I'll be tempted to take one or two, or a handful - making it considerably lighter than the unopened one.
It's considered "like new" specify that It's only the factory seal! It's also a good idea to put it in the new category.
open or unopened? if unopened it will be safe to eat long after your dead
A system is considered a closed system when no mass crosses its boundaries, while a control volume is an open system where mass can enter or leave.