A Moment of Science

Posts tagged pressure changes

January 30, 2012

 

refrigerator coils

The Rolling Boil That Cools Your Food

It sounds crazy, but household refrigerators keep food cold by bringing liquid fluorocarbon to a boil.

April 14, 2009

 

Inside train tunnel

Popping Ears on a Train

When a train enters a tunnel, it compresses the air in front of it like a piston. Air in a tunnel can't be simply pushed aside--the tunnel walls are in the way.

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