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bio website lsauer.com
location Austria
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visits member for 1 year, 6 months
seen Dec 2 '12 at 7:29

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Oct
15
awarded  Scholar
Oct
15
comment atmospheric phenomenon? What causes condensation trails to converge?
...forgot to accept your answer. The aircraft design and resulting vortices seem crucial.
Oct
15
accepted atmospheric phenomenon? What causes condensation trails to converge?
Oct
2
awarded  Supporter
Oct
1
awarded  Editor
Oct
1
revised atmospheric phenomenon? What causes condensation trails to converge?
+links
Oct
1
comment atmospheric phenomenon? What causes condensation trails to converge?
Anna, I agree. Whenever we are talking about atmospheric effects, observed over hundreds of meters, optical effects must be considered, even more so when we are talking about non-adiabatic cooling in the contrail formation. Notwithstanding the sun's position and the camera lens distortion and plane-"glow", etc... I failed to mention that I did observe the described contrail-shape with quite some consistency over varying angles of ascension and declination. Great photos, btw! Good explanation, but I am not quite satisfied yet...
Oct
1
awarded  Student
Oct
1
awarded  Analytical
Oct
1
asked atmospheric phenomenon? What causes condensation trails to converge?
Sep
28
comment What is the most energy efficient way to boil an egg?
@MartinBeckett Your case is harder to calculate, then ohmic heating. I reckon a typical vacuum pump gets exponentially more inefficient as it reaches its min-pressure threshold limit. There are also two[sic!] very different phases (egg-shell excluded) - the reason for microwave-egg explosions. Carl, the egg is currently accelerating at 10m/s towards earth and doesn't bring itself into orbit ;) Lastly, since almost all energy was of solar origin, and we are subject to an open system, I would argue for a solar cooker