The radio galaxy Cygnus A possesses a lobe of plasma that is detected by both radio and X-ray observatories. The temperature of the X-ray-emitting plasma is 4 keV and the number density of the particles in the plasma is 4x10³ m-3. Assume that the plasma is composed solely of completely ionized hydrogen, so the number densities of protons and electrons per cubic meter are identical. the given number density of particles corresponds to the number density of hydrogen nuclei, so you can safely assume that the number density of electrons is equivalent to this number density a) Compute the time in seconds between collisions between electrons and ions in the plasma. b) Compute the ratio of the time in seconds between collisions to the age of the Universe (13.7 billion years, where 1 year = 3.15x107 s). Therefore, how many collisions has a typical elec- tron experienced with a proton in this plasma during the lifetime of the Universe? c) Compute the mean free path in meters traveled by the electron between collisions.

The radio galaxy Cygnus A possesses a lobe of plasma that is detected by both radio and X-ray observatories. The temperature of the X-ray-emitting plasma is 4 keV and the number density of the particles in the plasma is 4x10³ m-3. Assume that the plasma is composed solely of completely ionized hydrogen, so the number densities of protons and electrons per cubic meter are identical. the given number density of particles corresponds to the number density of hydrogen nuclei, so you can safely assume that the number density of electrons is equivalent to this number density a) Compute the time in seconds between collisions between electrons and ions in the plasma. b) Compute the ratio of the time in seconds between collisions to the age of the Universe (13.7 billion years, where 1 year = 3.15x107 s). Therefore, how many collisions has a typical elec- tron experienced with a proton in this plasma during the lifetime of the Universe? c) Compute the mean free path in meters traveled by the electron between collisions.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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