A Moment of Science

Posts tagged funnel

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.

September 29, 2005

 

A Ping Pong Physics Trick

Here's a question for you: Do you think you could produce enough wind to blow a ping pong ball out of a funnel?

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