Question

question 18
stars with stellar cores about the size of the sun at the time they exhaust their nuclear fuel will collapse to become black holes.
true
false

question 19
energy systems scientists study different sources of energy, such as wind, solar, and fossil fuels, and their impact on the environment, communities, and the economy.
true
false

Explanation:

Analyze Question 18

Using the Stellar Evolution Stages knowledge point

• Stars with core masses comparable to the Sun (\(\le 1.44 M_\odot\) Chandrasekhar limit) lack the gravity to collapse into black holes.
• They end their lives as white dwarfs, not black holes.
• Therefore, the statement is false.

Analyze Question 19

Using the Energy Systems Science knowledge point

• Energy systems science is an interdisciplinary field studying energy sources, technologies, and their environmental, social, and economic impacts.
• The statement accurately describes the scope of energy systems science.
• Therefore, the statement is true.

Answer:

Question 18

• True
• False (Correct answer)

Question 19

• True (Correct answer)
• False