Tag

Feynman

All articles tagged with #feynman

science12 days ago•51 min saved

Seven quirky sprinklers upend Feynman and Mach on reverse sprayers

New York University researchers tested seven deliberately odd “silly” sprinkler designs to pit Mach’s angular-momentum idea against Feynman’s suction-based theory. Across all designs, rotation depended on the sprinkler’s central hub where the arms meet, not on how water carried momentum inside the arms or on nozzle geometry. The results debunk both classical explanations and suggest a unified view: the hub’s dynamics govern the spin. This insight could inform engineering designs that convert fluid flow into rotation, with potential applications for turbines and energy-harvesting devices.

via Yahoo|

#angular-momentum #ernst-mach #feynman

science14 days ago•108 min saved

Sprinkler Spin Mystery Resolved: Central Momentum Drives the Motion

Physicists tested seven deliberately odd 'silly' sprinklers to settle a long‑standing question about reverse sprinklers. The experiments debunk both Mach’s angular‑momentum balance idea and Feynman’s pressure/suction theory, showing that rotation is governed by momentum flux at the central hub where the arms meet. The results imply the reverse sprinkler behaves like an inside‑out version of a forward sprinkler, with researchers planning simulations and potential energy‑harvesting applications.

via Live Science|

#feynman #fluid-dynamics #mach

science11 months ago•7 min saved

Bridging Gravity and Quantum Theory Through Time

The article discusses the challenge of unifying gravity with quantum theory, highlighting the differences between how quantum mechanics and general relativity conceptualize space and time. It explains the limitations of the Copenhagen interpretation for quantum gravity and explores Richard Feynman's alternative approach, which focuses on events and histories in space-time rather than dualities of location, as a promising way forward in understanding quantum gravity.

via Nature|

#feynman #gravity #hilbert-space

physics2 years ago•5 min saved

"Solution Found for Feynman's Reversed Sprinkler Puzzle in Physics"

Researchers have definitively resolved physicist Richard Feynman's puzzle about the rotational direction of an S-shaped lawn sprinkler when submerged and its flow direction reversed. Experiments show that the sprinkler reverses its rotational direction, driven by jet propulsion, with unsteady and slower motion. The study's carefully designed geometry and low friction help to understand the mechanisms involved, with potential applications in fluid mechanics for controlling flows and modifying forces in technologies that harvest energy from air or water.

via Physics|

#experiments #feynman #fluid-dynamics