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The daylight hours are the shortest at the beginning of what season?
Q2: Your bike is worth $100 and if
Q5: According to Pythagoras,what was the shape of
Q8: The temperature on the surface of Mars
Q9: How does the light-gathering power of a
Q14: Venus's atmosphere contains much more carbon dioxide
Q18: The Pioneer and Voyager spacecraft were used
Q18: More than 99% of the mass of
Q20: Say one morning you are considering weather
Q28: The half-life for radioactive decay of potassium
Q46: Suppose your university decides to increase parking