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Dec
1
revised If there is no gravity on the moon why is the american flag waving?
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Nov
3
reviewed No Action Needed Coupling of LC circuits
Nov
2
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Nov
2
reviewed Reject If there is no gravity on the moon why is the american flag waving?
Jun
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May
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Apr
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Nov
5
revised If there is no gravity on the moon why is the american flag waving?
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Nov
5
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Jun
9
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Jan
20
reviewed Reviewed According to relativity, can a statement be true and false in same time?
Jan
20
reviewed No Action Needed How do you prove $S=-\sum p\ln p$?
Jan
15
reviewed No Action Needed Are the Maxwell's equations enough to derive the law of Coulomb?
Jan
9
awarded  Enlightened
Jan
9
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Jan
8
reviewed No Action Needed is lightning attracted to pointy objects?
Dec
30
reviewed No Action Needed Large deflection of cantilever beam
Dec
21
comment Age of the universe and age of stars
@Anixx - If the star is 13 billion years old it probably isn't still shining "today". Don't forget we're seeing it as it was when it's light left it. If HD140283 is an appreciable distance from us then it has probably long since died.
Dec
21
answered Age of the universe and age of stars
Dec
15
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