Pages tagged “physics”

18 Feb 2019

A watched kettle never boils...

…so I’m not sure whether this see-through kettle in a shared workplace really did take forever to reach 100ºC. I was watching, and it took ages. I used the state-change staring time to remember a physics supervision from university, and how much I enjoyed learning about the sound of a kettle. I listened to the transition from a scratchy, higher pitched “cavitational crackle” to a mellifluous, quieter bubbling as the process advanced.

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05 Nov 2015

One unexpected pleasure of fatherhood...

…is that this morning I got to test physics by driving about with a helium balloon in the car. I think I am happy explaining the phenomenon without reference to general relativity but it’s an interesting perspective Why does a helium filled balloon move forward when a car accelerates Happy Birthday Iris!

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