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free-body force diagrams

Buoyancy – Galileo’s Thermometer

I am happy with the explanation in this video. I think students would need to draw free-body force diagrams to understand the physics behind the thermometer. In one of my assignments I asked my students to look up how the density of water changes with temperature. Then work out how much sand they would need to put into ping pong balls to get them to sink at a set of given temperatures, effectively creating their own Galilean thermometer.

A Toolbox of Diagrams

Formula and diagrams are forms of communication in many disciplines, not just the sciences. This video, A Toolbox of Diagrams, allows the viewer to eavesdrop on a discussion between a tutor and lecturer about why diagrams are included in their students learning environment and how the lecturer wants the tutor to approach discussions about diagrams when working with the students.

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