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Posted by on Sunday, January 29, 2012 at 5:52am.

Discuss what happens when a man fires a pistol in front of a flight of stairs in a large hall.

  • physics - , Sunday, January 29, 2012 at 6:18am

    There will be an extended-pulse echo, lasting about 0.1 seconds, due to the widelly varying distances travelled by the sound waves.

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