Just an FYI: A 250 lb football player, running 15 mph, has more kinetic energy than a bullet fired from an AK-47 rifle.
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@neiltyson@MohamedofShaban is that at the muzzle?Thanks. Twitter will use this to make your timeline better. UndoUndo
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@neiltyson@MohamedofShaban 7.62x51mm NATO round @ 9.7g @ 853 m/s => 3539 J. Greater than the player. -
@neiltyson@MohamedofShaban Same kinetic energy as a car (3500 lb) moving at a fast walk (~4 mph). I wouldn't want to stop either one!
End of conversation
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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