26) He discovered that Jupiter has moons.
  • C) A planet's mass has no effect on its orbit around the Sun.
  • E) Ptolemy
  • C) Galileo
  • B) size of a typical planet
24) At which lunar phase(s) are tides least pronounced (e.g., the lowest high tides)?
  • A) the average kinetic energy of particles in a substance
  • B) size of a typical planet
  • E) both first and third quarters
  • A) Your friend will also see a crescent moon.
30) He developed a system for predicting planetary positions that remained in use for some 1,500 years.
  • C) A planet's mass has no effect on its orbit around the Sun.
  • E) Ptolemy
  • E) both first and third quarters
  • C) Galileo
29) Suppose you heat an oven to 400°F and boil a pot of water. Which of the following explains why you would beburned by sticking your hand briefly in the pot but not by sticking your hand briefly in the oven?
  • D) The water can transfer heat to your arm more quickly than the air.
  • A) the average kinetic energy of particles in a substance
  • A) Your friend will also see a crescent moon.
  • C) Each orbit takes about 1 year, which we know from Kepler's third law.
22) Suppose a comet orbits the Sun on a highly eccentric orbit with an average (semimajor axis) distance of 1 AU.How long does it take to complete each orbit, and how do we know?
  • C) Each orbit takes about 1 year, which we know from Kepler's third law.
  • E) both first and third quarters
  • A) Your friend will also see a crescent moon.
  • D) The water can transfer heat to your arm more quickly than the air.
28) What causes the apparent retrograde motion of the planets?
  • A) As Earth passes another planet, the other planet appears to move backward with respect to thebackground stars, but the planet's motion does not really change.
  • A) the average kinetic energy of particles in a substance
  • E) both first and third quarters
  • B) size of a typical planet
25) Suppose you live in the United States and you see a crescent moon in your evening sky tonight. What will afriend in South America see tonight?
  • E) both first and third quarters
  • A) Your friend will also see a crescent moon.
  • C) Each orbit takes about 1 year, which we know from Kepler's third law.
  • D) The water can transfer heat to your arm more quickly than the air.
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