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5 questions with no upvoted or accepted answers
1 vote
0 answers
52 views

Would a candle in very high gravity blow itself out?

A candle creates an upward draft of hot air, without which the flame would be spherical. The buoyancy generated is proportional to the density difference as well as the strength of gravity. Suppose a ...
Kevin Kostlan's user avatar
0 votes
0 answers
16 views

Surface Tension vs. Gravity: Finding the Critical Length Scale

I'm studying Kardar's "Statistical mechanics of particles" book and tackled a problem. After solving it, I checked Kardar's solution and found that he has different approach. I'm interested ...
MaxL's user avatar
  • 31
0 votes
3 answers
76 views

Does work done by gravity (alone) heat things up?

If we take the first law of thermodynamics: $$ΔQ = ΔU+ΔW$$ And we consider a system of a ball falling from height $h$ in an Earth-like gravitational field(no air drag and $h$<<$Rₑ$) $$ΔU = mgh$$ ...
TheTheoMess's user avatar
0 votes
1 answer
41 views

Amount of extension of the metal rods in the same system

If we heated two identical metal rod both vertically and horizontally, we would observe that it expands. However, if the rod is placed vertically, gravity will indeed play a role. The expansion of the ...
Dazai's user avatar
  • 9
0 votes
1 answer
57 views

Gravity train in other planets?

A Gravity train (https://en.wikipedia.org/wiki/Gravity_train) goes through a tunnel inside a planet that connects point A with point B. On Earth, the train would not gain enough impulse to reach the ...
vengaq's user avatar
  • 2,462