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visits member for 1 year, 10 months
seen Jun 25 '12 at 20:20

Jun
26
awarded  Teacher
Jun
25
asked Can a large thermonuclear bomb be used for planetary defence?
Jun
25
awarded  Editor
Jun
25
revised What happens to the energy when waves perfectly cancel each other?
Improved description.
Jun
25
answered What happens to the energy when waves perfectly cancel each other?