Practice Test

Question 1

Seven-eighths of a sample of hydrogen-3 will have become a stable isotope after 36 point 9 years. What is the half-life of hydrogen-3?

Revolt · Accepted Answer

A: 12 point 3  years

Question 2

Which best describes Jin's error?

Revolt · Accepted Answer

B: For step 1, he should have subtracted 78 J from 180 J to find the change in internal energy.

Question 3

Which statement best explains who is incorrect?

Revolt · Accepted Answer

B: Mia is incorrect because machines and engines can never be 100 percent efficient.

Question 4

Which best describes the relationship between internal energy and thermal energy?

Revolt · Accepted Answer

C: Thermal energy is the portion of internal energy that can be transferred.

Question 5

Which arrow best indicates the second law of thermodynamics?

Revolt · Accepted Answer

B: X

Question 6

According to the first law of thermodynamics, what could happen when heat is added to a system?

Revolt · Accepted Answer

C: The heat is turned into work done by the system.

Question 7

Which best describes the relationship between internal energy and thermal energy?

Revolt · Accepted Answer

B: Thermal energy is the portion of internal energy that can be transferred.

Question 8

Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of both substances before conduction occurred?

Revolt · Accepted Answer

C: Substance X’s molecules were faster than substance Y’s.

Question 9

Substance X transfers thermal energy to substance Y through conduction. What is an accurate conclusion about the condition of both substances before conduction occurred?

Revolt · Accepted Answer

A: Substance X’s molecules were faster than substance Y’s.

Question 10

Which best describes Jin's error?

Revolt · Accepted Answer

B: For step 1, he should have subtracted 78 J from 180 J to find the change in internal energy.

Practice Test Answers

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