High-speed imaging reveals that the squeak of soft–rigid frictional interfaces, like sneakers sliding on a basketball court, arises from intersonic opening slip pulses—analogous to earthquake ruptures—that thin ridges on the rubber confine to repeat at a musical frequency.
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From photo quality to the lever you pull to print photos, Leica’s Sofort 2 is a terrific camera that’s remarkably similar to the Instax Mini Evo. In all of my tests, the photos I took with both looked identical. The two hybrid cameras also print smartphone photos via Instax Mini film and offer 10 film and lens effects, along with a macro mode for those who want more creative control. The Sofort 2’s minimalistic look is stylish, too, even if it’s not as charming as the retro-inspired Evo.
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This story was originally featured on Fortune.com