Results 21 to 30 of about 18,585 (259)
Lifetime of a bouncing droplet [PDF]
Physical Review E, 2007 When a droplet is gently laid onto the surface of the same liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by injecting fresh air under the droplet. This can happen when the surface of the bath oscillates vertically. In this case the droplet basically bounces on the interface.
Terwagne, Denis +2 more
openaire +3 more sources
Soft Matter, 2020 Repellent materials are known for their ability to make impacting water recoil and takeoff, which keeps them dry after rain.
Jha, Aditya +3 more
openaire +3 more sources
Cosmological super-bounce [PDF]
Physical Review D, 2014 38 pages, 13 figures, v3: typos ...
Michael Koehn +2 more
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Air Pressure and Coefficient of Restitution of a Ball [PDF]
Journal of Science International School Bangkok, 2013 The relationship between the pressure of a ball and its coefficient of restitution was investigated, a rubber handball was inflated to eight varying air pressures and then dropped from a constant height.
JuWon Kim, Chanhyeok Yim
doaj +2 more sources
Physics Letters B, 2002 Two classical scalar fields are minimally coupled to gravity in the Kachru-Shulz-Silverstein scenario with a rolling fifth radius. A Tolman wormhole solution is found for a R x S^3 brane with Lorentz metric and for a R x AdS_3 brane with positive definite metric.
openaire +4 more sources
Primordial gravitational waves spectrum in the Coupled-Scalar-Tachyon Bounce Universe
European Physical Journal C: Particles and Fields, 2020 We extend our study on the Coupled-Scalar-Tachyon Bounce Universe to obtain its gravitational waves spectrum. We derive in detail the equations of motion for the tensorial modes of primordial metric perturbations in the Coupled-Scalar-Tachyon Bounce ...
Nan Zhang, Yeuk-Kwan E. Cheung
doaj +1 more source
Coefficient of Restitution of Wet Tennis Balls [PDF]
International Scholastic Journal of Science, 2014 The coefficient of restitution of a damp tennis ball is of interest to tennis players. Using a spray bottle, water was added to a tennis ball and the mass of water on the wet ball was determined. The ball was then dropped from a fixed height of 0.86 m.
Eugene Jang, Tony Kim
doaj +1 more source
Spin Rate of a Racquetball Due To Angular Impact [PDF]
Journal of Science International School Bangkok, 2014 The relationship between the impact angle of a racquetball and the resulting angular velocity of the ball was investigated. Impact angles ranging from 0° to 80° were tested.
Dolev Illouz
doaj
Pre-Big-Bang Black-Hole Remnants and Past Low Entropy
Universe, 2018 Dark matter could be composed by black-hole remnants formed before the big-bang era in a bouncing cosmology. This hypothetical scenario has implications on the issue of the arrow of time: it upsets a common attribution of past low entropy to the state of
Carlo Rovelli, Francesca Vidotto
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Neuroblastoma's complex, heterogeneous biology poses significant diagnostic and therapeutic challenges, often requiring caregivers to absorb complex information and participate in time‐sensitive decisions. However, caregivers often feel unprepared to evaluate options.
Vickie Buenger +8 more
wiley +1 more source