Questacon's David Cannell demonstrates a number of experiments using liquid nitrogen, showing the effect of the "boiling cold" fluid on lettuce (freezing and disintegrating), warm water and soap (an eruption of bubbles), and boiling water (fog cloud).
Questacon's Sarah Clark demonstrates the principle of "protostorming" at the National Science and Technology Centre, quickly developing as many prototypes as possible of objects that move in the wind, using simple materials, and then refining those designs.
Questacon's Tam Conner demonstrates how to make a robot that draws by itself, using a DC motor, AA batteries, battery holder, switch, wire, masking tape, hot melt glue stick, paper cup and markers.
Questacon's David and Sam demonstrate how a flame tube responds to the different sounds effect flames emitted from a perforated gas-filled tube, revealing the relationship between sound waves and pressure, as a kind of "flaming graphics equaliser".
Questacon's Jake Clark demonstrates how to create a 3D figurine of Scope host Lee Constable, explaining how a scanner captures her shape, which is turned into a computer-aided design model, and then printed in layers with plastic filament and resin printers.
Questacon's David and Sam demonstrate how sodium bicarbonate, citric acid and water react when they're mixed together, with explosive effect.
Questacon's Patrick Healan demonstrates how a balloon bursts in different ways depending on where you try to pop it, all in slow motion, revealing how pressure makes a difference, and how a spark makes a hydrogen balloon explode in flames.
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