Physics - Angle and Friction Matter for Table Tennis Spin
The angle of incidence and the friction of the surface are the only factors that impact the spin of a table tennis ball after it collides with a rigid surface.
Source: aps.org
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Physics - Gravity Alters the Shape of an Evaporating Droplet
Whether sitting or hanging, the surface of a protein-containing droplet changes as the water escapes, an effect researchers link to the pull of gravity.
Source: aps.org
Physics - Curved-Laser Demonstration for a Higher-Energy Laser Accelerator
A curved “laser wakefield accelerator” could boost the acceleration potential of a multistage version of this device.
Source: aps.org
Physics - Measuring Cosmic Expansion with a Lensed Supernova
Astronomers have demonstrated a new method for determining the Hubble constant that involves measuring the time delay between multiple images of a lensed supernova.
Source: aps.org
Physics - Electron Bunches Break the Picosecond Barrier
A method for producing ultrashort, ultracold electron bunches could improve the resolution of electron-based imaging methods.
Source: aps.org