A scientist tries to determine why a particular car is getting a much lower gas mileage than claimed by the manufacturer by systematically designing experiments to test possible causes for the problem. This is an example of
A) discovery science
B) nonscience
C) hypothesis-driven science
D) pseudoscience
C
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Applications to Astronomy: A Hertzsprung-Russell diagram shows stars on a plot of
A. apparent brightness vs. temperature. B. luminosity vs. temperature. C. luminosity vs. distance. D. magnitude vs. apparent brightness.
Charon's orbit:
A) lies exactly in Pluto's orbital plane. B) is highly inclined to Pluto's orbital plane. C) is perpendicular to Pluto's equator. D) is retrograde. E) has not been determined yet.
A double-star system with each star having the mass of the Sun has an orbital period of 1 year. A second double star system, also with each star having the mass of the Sun, has an orbital period of 8 years. If the separation of the stars in the first system is d and the orbits in both cases are circular, what is the separation of the stars in the second system?
a. 0.5d b. 2d c. 4d d. 8d