This physical process is the classical example of a Wiener process, and Feynman developed a thought experiment that uses a ratchet to derive work from this process.
One equation used to describe this process states that m a is equal to F x minus beta times the velocity vector plus eta of t. Levy stated that a process X is one of these if it is its own natural filtration and if X sub I times X sub J minus Kronecker sub ij times t for all I and J is a martingale. This physical process is the classical example of a Wiener process, and Feynman developed a thought experiment that uses a ratchet to derive work from this process. This process is described by the Langevin equation, while it is used to predict the size of molecules based on one of Einstein's Annus Mirabilis papers. It was first observed by its namesake via pollen grains in water. For 10 points, name this random movement of particles in a fluid.
One equation used to describe this process states that m a is equal to F x minus beta times the velocity vector plus eta of t. Levy stated that a process X is one of these if it is its own natural filtration and if X sub
 Brownian motion