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What Happens When You Fire An AK-47 Underwater [Video]

• http://www.popsci.com, By Kelsey D. Atherton
 The AK-47 is an iconic assault rifle, popular among revolutionaries and known for its rugged, reliable design. Thanks to the team at Smarter Every Day and The Slow Mo Guys, the AK-47 is also a way to learn about physics! Underwater, the bullet travels only about 5 to 6 feet (in the air, it can travel some 1,300 feet). That's neat if unsurprising; water is much denser than air and puts up greater resistance. The real science clocks in at the 6-minute mark, in an explanation of how bubbles work underwater and the way pressure from the bullet turns water to vapor before the round has even left the barrel. Cool!
 
 

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