What potential problem did the northwest ordinance create

The problem that the northwest ordinance created what the civil war.  the northwest ordinance made slavery and  involuntary servitude were forbidden in the Northwest Territory.  It made the Ohio River the dividing line between the north and the south.  

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

hope it : )

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )