In a bubble test, air is blown in front of the spinning propeller to visualize the flow of the water. This revealed some stalling on the bi-blade and the toroidal design too, which would explain ...

If it continues to slow down, it might stop completely and ... They found and measured the motion of two cyanogen jets coming from comet 41P/Tuttle-Giacobini-Kresak. From these jets, they ...

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Impacts by high-speed raindrops only briefly interrupt the seed's spinning because the seed can shed the drop rapidly and ...