The mass-luminosity relation applies to both white dwarfs and main-sequence stars as both trace linear lines on the H-R diagram
a. True
b. False
Indicate whether the statement is true or false
False
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The orbits of halo stars are typically circular and have a low inclination with respect to the disk
Indicate whether the statement is true or false
A vector quantity has only a magnitude and no direction associated with it
a. True b. False Indicate whether the statement is true or false
A ball rolls along a horizontal track in a certain time. If the track has a small upward dent in it, the time to roll the length of the track will be
A) less. B) the same. C) more.
If the absolute temperature of an object is tripled, the thermal power radiated by this object (assuming that its emissivity and size are not affected by the temperature change) will
A) increase by a factor of 3. B) increase by a factor of 9. C) increase by a factor of 18. D) increase by a factor of 27. E) increase by a factor of 81.