The diagram shows a heat engine. in which area of the diagram is unusable thermal energy detected? w x y z

Z is the area of the diagram which has unusable thermal energy

detected.

This is also referred to as heat energy and it is responsible for

temperature differences in a body or area.

The Z region which is denoted by blue is referred to as the cold

region while the W region is the hot region. We know that since

heat is usually lost to the surroundings , then heat has been lost

to the Z region which is unusable and detected

Read more about Thermal energy here link

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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i believe it is b. what was the cause of the big bang

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