For 60 years the world has believed that dolphins did not have enough muscle to propel them at high speed and that they were resorting to some fluid-flow trickery to pull off their impressive performance. But Frank Fish from ...
Plants & Animals
Jan 15, 2014
4
0
(Phys.org) —A team of researchers in the U.S. has found that jellyfish are extremely efficient swimmers. In their paper published in Proceedings of the National Academy of Sciences, the team reports using a technique called ...
An unexpected twist from a four-seam or a two-seam fastball can make the difference in a baseball team winning or losing the World Series. However, "some explanations regarding the different pitches are flat-out wrong," said ...
General Physics
Nov 18, 2018
0
242
Fluid dynamics researchers use many techniques to study turbulent flows like ocean currents, or the swirling atmosphere of other planets. Arezoo Adrekani's team has discovered that a mathematical construct used in these fields ...
Soft Matter
Jan 27, 2023
0
311
Much more oil is spewing into the Gulf of Mexico from a sunken British Petroleum oil rig than official estimates show, experts warned Friday as BP executives stuck to their guns and even tried to play down the size of the ...
Environment
May 14, 2010
67
0
As of today, the Wikipedia entry for the hummingbird explains that the bird's flight generates in its wake a single trail of vortices that helps the bird hover. But after conducting experiments with hummingbirds in the lab, ...
General Physics
Feb 25, 2013
0
1
Researchers from University of Tsukuba investigated the propulsion mechanism by visualizing water flow around a swimmer during underwater dolphin-kick swimming in a water channel via particle image velocimetry. Their findings ...
General Physics
Mar 12, 2024
0
18
Most scientists who create models trying to understand the mechanics and aerodynamics of insect flight have assumed that insect wings are relatively rigid as they flap.
General Physics
Jun 29, 2009
1
0
Countless times a day, seabirds dive-catch prey from the ocean, boats enter the water from dry land, and seaplanes touch down gently amid the waves. The phenomenon of objects entering water is commonplace, yet a full understanding ...
General Physics
Jul 23, 2018
0
129
(PhysOrg.com) -- "Smooth" and "quiet" are two words not usually associated with a helicopter ride, but NASA is working to change that. A full-size UH-60A Blackhawk helicopter rotor was the subject of tests the agency's Subsonic ...
Engineering
Jun 7, 2010
0
0
