# UBC PHAS Demonstration Room Catalog

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demonstrations:2_fluid_mechanics:2b_statics_of_fluids:ball_in_bowl_of_beans:start

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 demonstrations:2_fluid_mechanics:2b_statics_of_fluids:ball_in_bowl_of_beans:start [2019/02/14 23:33]127.0.0.1 external edit demonstrations:2_fluid_mechanics:2b_statics_of_fluids:ball_in_bowl_of_beans:start [2019/03/26 16:31]demoroom 2020/01/28 21:54 demoroom 2019/03/26 16:45 demoroom 2019/03/26 16:31 demoroom 2019/02/14 23:33 external edit 2020/01/28 21:54 demoroom 2019/03/26 16:45 demoroom 2019/03/26 16:31 demoroom 2019/02/14 23:33 external edit Next revision Both sides next revision Line 11: Line 11: ===== Description ===== ===== Description ===== - Demonstrate buoyancy and density ​   Classes Used: PHYS 101 + This classic demonstration consists of a large bowl filled with dried black beans. - + - + - + ===== Purpose ===== ===== Purpose ===== - + To demonstrate how the density ​of a material ​affects ​it'​s ​buoyancy. Also shows how the idea of buoyancy can apply in media other than water. - To demonstrate how density affects buoyancy ​ + - + ===== Apparatus ===== ===== Apparatus ===== - + * Bowl filled ​with beans - Bowl with Beans  Ping Pong Ball  ​Steel ​Ball + * Steel ball - + * Ping-pong ball ===== Setup ===== ===== Setup ===== - + ​- Bury ping pong ball deep into the beans. - - Insert ​ping pong ball deep into the beans. + - Place steel ball on top of the beans. - - Place steel sphere ​on top of the beans. + - Next, gently shake the bowl. As you do this the ping pong ball will rise to the surface and the steel ball will sink to the bottom. This shows that the density of the beans is somewhere between that of the two balls. - - Shake bowl and sphere moves to bottom and ping pong ball moves to the top. + - - The density of the beans is somewhere ​in between that of the steel ball and ping pong ball.  ​Updated on 06/10/13 + - + - ===== Notes ===== + - +