After a star leaves the main sequence, ________.
A. all hydrogen in the star has been fused, and helium fusion begins
B. it now fuses hydrogen into helium in a shell outside the core
C. it continues to fuse hydrogen into helium in its core
D. it no longer fuses hydrogen into helium anywhere inside the star
Answer: B
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A. 0.00 V B. 2.37 V C. 63.0 V D. 109 V E. 119 V
In a Hertzsprung-Russell (H-R) diagram, a star is represented by a _____ on the graph that tells you its luminosity and temperature
A) cross B) broken line C) point D) dotted line
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A. 2.3 s B. 2.6 s C. 2.9 s D. 3.2 s E. 3.6 s
Thermal energy is measured in
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