PHYS 1201 Lecture : Lecture41
Document Summary
Friday, may 4, 2012: hw 15: optional hw on chapters 19 & 20. Optional means it does not contribute to your nal grade at all. However, working hw 15 will help you review for the nal exam. Hw 15 solutions are posted: of ce hours mwf 12:30-1:30 (today only until 12:55, final exam: may 8 5:30-7:30pm: The latest formula sheet will be posted on moodle today. Th: heat energy qh ows from the high- temp. reservoir to the working substance . Some heat energy ql is lost and transferred to the cold reservoir: ef ciency: energy we get energy we pay for. Ql + w = qh (total energy conserved: carnot engine: all processes reversible. We can relate the ef ciency to the temperatures th and tl: Refrigerator: engine: uses heat ow from hot reservoir to cold reservoir to produce work, refrigerator: uses work to transfer energy from a cold reservoir to a hot reservoir.
