Which one does NOT belong?

Exercise and reference answers

Questions

1. Items

   1. Open system
   2. Closed system
   3. Linear system
   4. Isolated system

   Reason

   Thermodynamics classifies systems as open, closed or isolated. Linear system is not one of them.

   Odd item

   Linear system

2. Items

   1. Internal energy
   2. Work
   3. Heat
   4. Cartesian product

   Reason

   Cartesian product belongs to set theory, not to thermodynamics.

   Odd item

   Cartesian product

Instructions

Tap the item that does not belong with the rest.

Explanation