If sunlight were green instead of white, the most comfortable color to wear on a cold day would be
A) magenta.
B) yellow.
C) green.
D) blue.
E) violet.
Answer: A
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A) Explain which star is apparently brighter to you as viewed from Earth on a clear night, a star with a negative value or a star with a positive value. b) If star A has an apparent visual magnitude that is more negative than star B, which is the brighter star?
What will be an ideal response?
The Milky Way is part of I. a poor cluster. II. a rich cluster. III. the Virgo Cluster. IV. the Local Group
a. I and III b. I and IV c. II and III d. II and IV e. just III
Sublimation is a change of phase from solid to gas without
A) passing through the liquid phase. B) a transfer of energy. C) a change of temperature.
When an ideal gas is expanded in volume at constant pressure, the average kinetic energy of the gas molecules
A) increases. B) decreases. C) does not change. D) may either increase or decrease, depending on whether or not the process is carried out adiabatically. E) may or may not change, but insufficient information is given to make such a determination.