Physics 125A Lecture Notes - Lecture 17: Volatiles, Chemical Bond, Planetesimal
Document Summary
Field: force extended through space: gravity. Arrows and lines all point toward the center of the earth. End in masses: electric field (e field) Can be lines: magnetic fields (b field) ^ create and are affected by field. 2 wires carrying a current are close and parallel, they repel each other. Sane as electric field, magnetic field exerts a force on charged particles. Electric charges in motion (electric current) generates magnetic field. Summary of earth"s magnetic field: ingredients needed to generate a magnetic field: Hot inner core that drives convection in that fluid layer. Solar wind: plasma emitted from the sun by magnetic perturbations, it is composed of charged particles, reaching speeds of 900 km/s, what escapes sun"s magnetic field has *charge and *speed, deflects moving charged particles. Revisiting the frost line: building intuition: Metals and heavy molecules will not move as fast. Volatiles (traditionally gases at room temperature) will always be moving if there is heat.
