Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
From: www.middleschoolchemistry.com
Using an example like Christmas lights, I would say yes because normally a lot of them would go out if one light is broken.
The action force is you sitting on the chair and the reaction force is the gravity on the chair that is caused by you sitting on the chair
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Just add what they equal to hope this helps :)
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