PHYS-E0461 - Introduction to plasma physics for fusion and space applications D, 07.09.2020-09.12.2020
Kurssiasetusten perusteella kurssi on päättynyt 09.12.2020 Etsi kursseja: PHYS-E0461
Food for thought # 3: planets and atmospheres
Suorituksen vaatimukset
Palautettava viimeistään: keskiviikkona 30. syyskuuta 2020, 23.00
Planets have a so-called
escape velocity: if a particle (or body) is moving away at speed
exceeding the escape velocity, the gravitational pull is not strong
enough to withhold it. The escape velocity is given by where is the gravitational constant, is the mass of the planet to escape from, and
is the distance of the particle/body from the center of the planet.
Assume that particles at the top of an atmosphere follow the Maxwellian
distribution. Discuss the existence of atmospheres around different
kinds (size, mass, temperature) of planets keeping in mind that the
particles collide exchanging energy and momentum.