Added 6 years ago | 00:59:57 | 16753 views
04/22/2009 7:00 PM Simmons HallSteven Hamburg, Chief Scientist, Environmental Defense FundDescription: The "dominant story of the next century" will be one of either gloom or redemption, says Steven Hamburg, depending on how humanity cho...
Added almost 8 years ago | 00:02:02 | 44301 views
A fluorescent tube swings at the end of a long plexiglass rod. It is made to rotate and then brought near the Van de Graaff generator. The tube lights up when there is a potential difference between its ends. This happens when it is poi...
Added over 8 years ago | 00:01:19 | 50203 views
Two pucks of the same mass are slid at each other on an air table, and their resulting collisions demonstrate conservation of momentum. Notice on the first collision, for example, that when a moving puck hits a stationary puck dead-on, ...
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