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User / DocJ96 / Sets / It's physics folks
Ian Jacobs / 340 items

N 2 B 352 C 1 E Nov 2, 2016 F Nov 1, 2016
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The most rarely photographed and most fleeting of all the recognised cloud types. The cloud forms by adiabatic cooling along the axis of a short-lived spinning vortex of air generated in this case in updrafts and cross winds close to cumulus clouds. At KVIS, Wang Chan Valley, Rayong Thailand. I saw it fully formed camera in-hand. Thirty seconds later it was gone.

Tags:   Horseshoe vortex cloud rare

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Conservation of momentum. A lawn-mower powered jet boat.

Tags:   tpc tpcu4 tpcu4l1

N 10 B 761 C 4 E May 12, 2015 F May 11, 2015
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Bursting water balloon large size. Very heavy and impossible to hold in one hand. The knifer is another person. Note the rubber disappearing behind the water. We can break the "rules" if we do it quickly enough. The next frame was chaos.

N 0 B 204 C 0 E Jun 26, 2015 F Jun 25, 2015
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.... Taken from the downside heavy end.

N 3 B 412 C 1 E Dec 22, 2014 F Dec 21, 2014
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The ACWM=CWM as they teach in schools. As the nest grew so did the tilt increase and the need to build up the outer edge. The bird handled the situation very well. I wonder if the requirement for a horizontal rim is genetically determined or a matter of conscious thought?


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