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?
Professor Dahmen received her Vordiplom in physics from the Universität Bonn, Germany, in 1989, and her Ph.D in physics from Cornell in 1995. Before joining the faculty at Illinois in 1999, she was a Junior Fellow at Harvard University.
She has wide-ranging interests in "soft" condensed matter physics, including nonequilibrium dynamical systems, hysteresis, avalanches, earthquakes, population biology, and disorder-induced critical behavior.
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