Why Riding An Elevator Is Like Changing Gravity
If you time it just right, throwing a ball in the air as an elevator starts to move, the ball seems to hang in the air for a moment, like gravity had been canceled, says astrophysicist Adam Frank.
Read more on NPR
Làm đẹp Blog 247 November 3, 2017 at 09:13PM
Category Health & Science
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