AST101H1 Lecture Notes - Lecture 19: Neutrino Detector, Thermostat, Electron Scattering

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Michael Reid

Document Summary

Basic properties of the sun: radius 696,000km (109 times the radius of the earth) 1: composition (by percentage of mass)- 70% h, 28% he, 2% heavier objects, rotation rate 27 days (equator) to 31 days (poles, surface temperature 5,800k (average), 4,000k (sun spots, core temperature 15 million k. J ourney to the centre of the sun: solar wind, corona, chromosphere, photosphere, convection zone, radioactive zone, core, photosphere. Fission = the process by which one atomic nucleus breaks into two smaller nuclei. It re- leases energy if the two smaller nuclei together are less massive than the original. Fusion: the process by which by which two two atomic nuclei fuse together to make a single, more massive nucleus. It releases energy if the final nucleus is more massive than the two nuclei that went into the reaction. With the sun at low speeds, electromagnetic repulsion prevents the collision of nuclei.