PHYS 1023 UARK Minor- Test 2 Study Guide
Questions and Answers with Complete
Solution | Latest Update 2026
TEST 2
The primary energy source that powered the Industrial Revolution was a form of:
Answer: Chemical energy
A force can act on an object without doing any work when:
Answer: The object does not move
If you slowly lift a 9 N book to a shelf 3 m high at constant speed (ignoring air resistance), the
work done is:
Answer: 27 joules
Energy is best defined as:
Answer: The ability to do work
Which of the standard forms of energy is found in sunlight?
Answer: Radiant energy
The main energy conversion in an electric blender is:
Answer: Electrical energy → kinetic energy
According to the second law of thermodynamics:
Answer: Heat flows naturally from higher to lower temperatures
A heat engine takes in 400 J of energy and releases 300 J. Its efficiency is:
Answer: 25%
Which of the following is NOT a heat engine?
Answer: A hydroelectric power plant
Does the growth of a leaf violate the law of entropy? Why or why not?
Answer: No, because the total entropy increases—the rise in entropy of the surrounding
radiation exceeds the decrease within the leaf
Questions and Answers with Complete
Solution | Latest Update 2026
TEST 2
The primary energy source that powered the Industrial Revolution was a form of:
Answer: Chemical energy
A force can act on an object without doing any work when:
Answer: The object does not move
If you slowly lift a 9 N book to a shelf 3 m high at constant speed (ignoring air resistance), the
work done is:
Answer: 27 joules
Energy is best defined as:
Answer: The ability to do work
Which of the standard forms of energy is found in sunlight?
Answer: Radiant energy
The main energy conversion in an electric blender is:
Answer: Electrical energy → kinetic energy
According to the second law of thermodynamics:
Answer: Heat flows naturally from higher to lower temperatures
A heat engine takes in 400 J of energy and releases 300 J. Its efficiency is:
Answer: 25%
Which of the following is NOT a heat engine?
Answer: A hydroelectric power plant
Does the growth of a leaf violate the law of entropy? Why or why not?
Answer: No, because the total entropy increases—the rise in entropy of the surrounding
radiation exceeds the decrease within the leaf
