The purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account for
a. prograde motion.
b. Mercury and Venus' limited angular distance from the Sun.
c. retrograde motion.
d. non-uniform speed of the planets in their orbits.
e. precession of the equinoxes.
C
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A closed vial of gas is heated with a flame.
C. Consistent D. Inconsistent
We do not know for certain whether the general trends we observe in stellar birth masses also apply to brown dwarfs. But if they do, then which of the following would be true?
A) Brown dwarfs would outnumber all ordinary stars. B) Brown dwarfs would be responsible for most of the overall luminosity of our Milky Way Galaxy. C) Brown dwarfs would be extremely rare. D) Most of the brown dwarfs in the Milky Way Galaxy would be quite young in age.
A heat engine has an efficiency of 35.0% and receives 150 J of heat per cycle. How much work does it waste in each cycle?
What will be an ideal response?
The type of heat transfer that occurs between warm food and the air in the room is principally
A) convective. B) conductive. C) radiative. D) countercurrent. E) evaporation.