Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities

1

What does the area inside a closed cycle on a PV Diagram tell us?

1

Which of the following processes are isothermal?

1

Which of the following processes are isobaric?

1

Which of the following processes are isochoric?

1

What is the total change in energy for a closed cycle PV diagram?

1

We define thermal efficiency as:

1

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat input is required?

3 SF.

E = Joules

1

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat is discharged as waste heat from this engine per second?

2 SF.

E = Joules

1

What is unique about a Carnot Cycle heat engine?

1

1200 J of heat flowing spontaneously through a copper rod from a hot reservoir 650 K to a cold reservoir at 350 K. Determine
the amount by which this irreversible process changes the entropy of the universe, assuming that no other changes occur.

First blank is for the numeric value. The second blank is for the units, putting a space between all characters.

s =

12 Physics (12 Physics Fundamental Skills) Quiz on Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities, created by Ryan Elwell on 09/12/2019.

Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities

Week 4-5 - Energy Transformations, Efficiency, and PV Diagrams Capabilities

What does the area inside a closed cycle on a PV Diagram tell us?

Which of the following processes are isothermal?

Which of the following processes are isobaric?

Which of the following processes are isochoric?

What is the total change in energy for a closed cycle PV diagram?

We define thermal efficiency as:

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat input is required? 3 SF. E = Joules

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat is discharged as waste heat from this engine per second? 2 SF. E = Joules

What is unique about a Carnot Cycle heat engine?

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat input is required?

3 SF.

E = Joules

An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat is discharged as waste heat from this engine per second?

2 SF.

E = Joules