Loxuru
Graf von Kreuzigung
A combination of weight distribution and aerodynamics! The buttered side has slightly more weight - because of the butter, of course! So, the center of gravity is at the buttered side! Add to this the smoother surface of the buttered side, compared to the rough unbuttered side, the latter exerts more drag, bringing the unbuttered side even more on top. For giving influence to other forces, that could flip it over again, the drop height is too shortThis reminds me of that age old question.... when dropping your toast, why does it always land buttered side down?
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And if you are not convinced : ask Murphy (the one of The Law)