Harvard woman astronomer ________ discovered the period-luminosity relation
A) Antonia Maury
B) Annie Cannon
C) Cecilia Payne-Gaposchkin
D) Henrietta Leavitt
E) Williamina Fleming
D
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According to Callicles’ presentation in Plato’s Gorgias, nature herself (in contradistinction to conventional morality) dictates that
a. the more powerful individuals should have more than the less poweful b. the community should seek to maximize the happiness of the greatest number of people c. the less powerful individuals should have more than the more powerful d. treating everybody as equals is just
The major influence on the tides is due to __________
Fill in the blank(s) with correct word
How are the event horizon and Schwarzschild radius related?
A) The Schwarzschild radius is smaller than the distance from the singularity of a black hole to the event horizon. B) The Schwarzschild radius is equal to the distance from the singularity of a black hole to the event horizon. C) The Schwarzschild radius is greater than the distance from the singularity of a black hole to the event horizon. D) The size of the Schwarzschild radius is unrelated to the distance from the singularity of a black hole to the event horizon. E) The size of the Schwarzschild radius is proportional to the distance from the singularity of a black hole to the event horizon.
Which of the terrestrial planets has the most difficult time retaining an atmosphere?
a. Mercury b. Venus c. Earth d. Mars