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Introduction
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Coarse graining Alice and Dinah
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Coarse graining part I - Clustering algorithms
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Coarse graining part II - Entropy
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Markov Chains
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Mathematics of coarse grained Markov chains
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Mathematics of Coarse grained Markov Chains: The General Case
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A puzzle: origin of the slippy counter
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Where we are so far
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Cellular Automata: Introduction
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Israeli and Goldenfeld; projection and commuting diagrams
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Networks of Renormalization
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Fixing a projection: From CA’s to Ising
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Introduction to the Ising Model
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Coarse-graining the Lattice
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Inducing Quartets & Commutation Failure
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Finding Fixed Points
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Ising Model Simulations
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Poking the Creature: An Introduction to Group Theory
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Irreversible Computations, Forgetful Computers and the Krohn-Rhodes Theorem
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From Quantum Electrodynamics to Plasma Physics
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The Thermal Physics of Plasma
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How does a particle move the plasma?
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Charge Renormalization and Feedback
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Conclusion: Keeping the things that matter
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6.3 How does a particle move the plasma? » Quiz Solution
How does the temperature of the plasma alter the effective electric charge at long distances?
A. as temperature rises, it reduces the effective charge at large distance.
B. as temperature rises, it increases the effective charge at large distance.
C. it has no effect on the charge, but just changes the law of electromagnetism.
D. (B) or (C)
Answer (D). We can talk either in terms of a new "effective" charge, which changes. Or we can talk about an alteration to the 1/r law for the electric potential. Either way, the effect of increasing the temperature is to make the particles *less* sensitive to the electric potential; this means that there's less rearrangement of the particles in response to the test particle; and this means that the "shielding" -- the flow of positively charged particles inwards -- is less.