Wednesday between noon and 6pm, bundle up and head to the Balloon Inflation entry on 72nd Street and Columbus Avenue. The delightful balloons are inflated along 77th and 81st streets between Central Park West and Columbus Avenue. These blocks surround the huge, must-seeAmerican Museum of Natural...
"A related question: when you fill a balloon with helium, does the mass increase or decrease?"The mass increases, but the density decreases. Eventually buoyancy causes it to rise. Anonymous August 02, 2006 Here's a fun question:You're in a boat in a lake. There's a rock in ...
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