Compare the rotation of the stars and the spiral density wave pattern in our Galaxy. How is it observed?
What will be an ideal response?
The density wave moves slower than the stars do, based on the Doppler shifts of the stars compared to the gas and dust that forms the spiral arms.
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For a monatomic gas, 3R/2 is
a. the specific heat per mole at constant volume. b. the specific heat per unit mass at constant volume. c. NAkB. d. none of the above.
Wave 1 has amplitude of 9.0 units and wave 2 has amplitude 4.0 units. What is the ratio of their intensities, I1/I2?
A. 20 B. 5.1 C. 2.3 D. 1.5 E. 1.3
Betelgeuse has an MV = –5 and 1000 times the radius of the Sun. Barnard's Star has an MV = 13.2 and 100 times smaller than the Sun. Therefore, we can determine that the stars have the same temperature
a. True b. False Indicate whether the statement is true or false
What is the index of refraction inside a certain transparent material if the critical angle is found to be 48.° (air is outside)?
A) 1.49 B) 1.48 C) 1.35 D) 0.743 E) 1.22