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2 votes
1 answer
75 views

Since water can evaporate at any temperature above absolute 0, would the water cycle still be possible even without the Sun?

Since water can evaporate at any temperature (or even sublimate at less than 0°C, although at a very low rate: Why does water not evaporate in below 0 degrees?), could there be a water cycle if there ...
vengaq's user avatar
  • 2,462
1 vote
1 answer
141 views

If you dig a deep tunnel, will the rock sublimate?

If a tunnel is dug deep inside the crust (but before reaching places where the rock is liquid), how will the enormous downwards pressure manifest itself? Will the difference in pressure $(\rho_{rock}-\...
Ralph's user avatar
  • 714