What about brake fluid which is said to be incompressible. When I push down the brake pedal, the master cylindre pushes the brake liquid inside the hoses which tightens the brakes immediately? So what is the speed of propagation in this scenario if it cannot be faster than c even though brake fluid seems incompressible?
Scott Willenbrock received his Ph.D. in physics from the University of Texas-Austin, in 1986. He worked as a postdoctoral research associate at the University of Wisconsin, Madison from 1986 until 1988, and as a physicist at Brookhaven National Laboratory from 1988 until 1993. While at Brookhaven, he also worked as a guest scientist at the Fermi National Accelerator Laboratory. In 1993, he joined the Department of Physics at the University of Illinois at Urbana-Champaign.
A specialist in elementary particle theory, Professor Willenbrock's research accomplishments cover a wide variety of topics in high energy physics, ranging from relevant and influential highly technical calculations of higher-order corrections in quantum field theory to vitally important insights into the phenomenology of elementary particles. He is a world-recognized expert on the physics of high energy colliders, including the physics of the top quark, intermediate vector bosons, and Higgs particles. His research has focused on reliable predictions for electroweak phenomenology and specific methods for determining new physics at the electroweak energy scale and on the specific mechanisms of electroweak symmetry breaking. His recent work has included a detailed analysis of single top quark production processes and the expectations for the associated production of light Higgs particles at future hadron colliders. His work has important implications for future upgrades to the Tevatron collider at Fermilab and the physics program of the Large Hadron Collider at CERN.
Professor Willenbrock is also a gifted teacher, who has received a number of teaching awards, including the Alpha Lambda Delta Award for "Outstanding Teacher of Freshmen." That he received this award as the main lecturer in Physics 211, the mandatory introductory general mechanics course for all Illinois engineering students, makes his achievement — and the measure of his skills and commitment — all the more remarkable.
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