Philipp Albert has written an online triangle calculator that will calculate the missing sides, angles, area etc. for a triangle with three known values. It will also draw the triangle.
Philipp Albert hat einen Dreieck-Rechner entwickelt und online gestellt. Aus drei gegebenen Größen werden die fehlenden Seiten und Winkel sowie Flächenninhalte und In- und Umkreisradien berechnet. Außerdem wird das Dreieck gezeichnet.
… but you can see a pulse of light travel!
TED talk: Ramesh Raskar: Imaging at a trillion frames per second.
Link via Physics & Physical Science Demos, Labs, & Projects for High School Teachers.
Sometimes I wish that you could switch of gravity for some experiments, especially during some lessons at school. I’m sure my students and I would have as much fun as Don Pettit (his weblog is Letters to Earth) who uses his spare time on the ISS to do some fun experiments. I especially enjoyed watching Thin Film Physics, Goo! and of course the vacuum cleaner hose turned into didgeridoo.
By the way, his time lapse from space is also pretty neat.
Links via MetaFilter: Physics Demos that are OUt of this World, Earth from Day to Night.
One more link about this year‘s Venus transit: Transit of Venus. Link via Hal, if I remember correctly.
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