4. Atmospheres & Life (16 points): a. If alien life forms were able to breathe tungsten hexafluoride (WF6), what is the

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4 Atmospheres Life 16 Points A If Alien Life Forms Were Able To Breathe Tungsten Hexafluoride Wf6 What Is The 1 (417.85 KiB) Viewed 35 times

4. Atmospheres & Life (16 points): a. If alien life forms were able to breathe tungsten hexafluoride (WF6), what is the radius of the smallest rocky (density = 5 grams/cm) planet that they could live on that would still support an atmosphere? Assume that the planet's temperature is 300K. (Any colder, and the WF6 would condense...). b. On that smallest possible planet, what would the scale height of a tungsten hexafluoride atmosphere be? Assume that the planet's temperature is 300K. C. Calculate the ratio between the scale height and that planet's radius. If you were able to see such a planet passing in front of its host star, would you expect the atmosphere around this planet to intercept significantly more light than the planet itself at wavelengths strongly absorbed by WF ? d. Extra Credit for 2 points: Compute the density of WF. at the surface that would result in the surface pressure being 1 atm at 300K. If aliens living on that planet were anatomically similar to humans, would their voices have higher or lower frequencies than us?