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seen Feb 26 at 14:36

Feb
2
accepted When is the stress on an airplane the highest?
Feb
1
asked When is the stress on an airplane the highest?
Nov
28
awarded  Scholar
Nov
28
awarded  Supporter
Nov
28
accepted How long in advance can dates of moon phases be accurately predicted?
Nov
28
awarded  Student
Nov
28
asked How long in advance can dates of moon phases be accurately predicted?