If luminosity depends on radius and temperature, what does flux depend on? _______________
Fill in the blank(s) with correct word
distance
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Tripling the linear size of an object multiplies its area by
A) 3 and its volume by 9. B) 9 and its volume by 18. C) 9 and its volume by 27. D) 27 and its volume by 81. E) none of the above
The most recent features on the Moon's surface are the bright rayed craters like Copernicus, sitting atop the older mare flows
Indicate whether the statement is true or false
Passengers in a high-flying jumbo jet feel their normal weight in flight, whereas passengers in an orbiting space vehicle do not because they are
A) beyond the main pull of Earth's gravity. B) above the Earth's atmosphere. C) without support forces. D) all the above E) none of the above
As comets approach and move around the Sun, the coma and the tail ______________ in size
a. decrease b. increase c. remain the same d. none of the above