91Ó°ÊÓ

Venus's atmosphere contains about \(4.6 \times 10^{20} \mathrm{kg}\) of carbon dioxide \(\left(\mathrm{CO}_{2}\right)\). If all of the oxygen atoms in the \(\mathrm{CO}\), were combined with hydrogen to make water \(\left(\mathrm{H}_{2} \mathrm{O}\right)\) instead of carbon dioxide, what would the total mass of water be? (Note:Hydrogen has an atomic mass of \(1 ;\) carbon, \(12 ;\) oxygen, \(16 .\) How does this compare to the mass of Earth's oceans, about \(1.4 \times 10^{21} \mathrm{kg} ?\)

From your answer to problem \(1,\) how deep an ocean would this water produce if it were the same depth everywhere on the surface? (Note that \(1000 \mathrm{kg}\) of water fills a volume of 1 cubic meter.)

One city is at a longitude of \(78^{\circ} \mathrm{E}\) while a second on is at \(95^{\circ} \mathrm{W}\) How many hours will pass between a star crossing the meridian in the first city and in the second? If the time zone of each city is based on the closest longitude that is a multiple of \(15^{\circ}\) and the star passes overhead in the first city exactly at midnight, what time (by the clock) will it pass over the second city?

Suppose the Earth's spin slowed down until there were just 180 days in a year. Compare the length of a sidereal and a solar day in this new situation. (Do not redefine units of time- just express them in terms of our current hours, minutes, and seconds.

Suppose the Earth's spin slowed down until there were just 180 days in a year. Compare the length of a sidereal and a solar day in this new situation. (Do not redefine units of time- just express them in terms of our current hours, minutes, and seconds.