An artificial Earth satellite in an elliptical orbit has its greatest centripetal acceleration when it is at what location?
a. nearest the Earth
b. farthest from the Earth
c. between Earth and Moon
d. between Earth and Sun
a
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In terms of the mass M of our sun, what is the Chandrasekhar limit of stellar mass, below which a star will eventually collapse into a white dwarf?
A) 1.9 M B) 1.4 M C) 1.2 M D) 0.8 M
Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. Sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. Which one, if either is correct?
A. Beryl, because low thermal conductivity results in low heat transfer. B. Beryl, because low thermal conductivity results in high heat transfer. C. Sapphire, because low thermal conductivity results in low heat transfer. D. Sapphire, because low thermal conductivity results in high heat transfer. E. Neither, because low heat transfer is desirable both in summer and in winter.
How does a caldera form?
What will be an ideal response?
To see his full height, Blinky Bill who is 1 meter tall needs a mirror that is at least
A) 0.33 m tall. B) 0.50 m tall. C) 0.75 m tall. D) 1 m tall. E) depends on distance from the mirror.