ps15b40 - Ph 111.01 December 17, 2008 PS 15b (40) Problem 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Ph 111.01 December 17, 2008 PS 15b (40) Problem 1 = Walker P. 18-48. A research group plans to construct an engine that extracts energy from the ocean, using the fact that the water temperature near the surface is greater than the temperature in deep water. If the surface water temperature is 23.0 °C and the deep-water temperature is 14.0 °C, what is the maximum efficiency such an engine could have? The efficiency is calculated from the temperatures of the heat reservoirs – temperatures in Kelvins, relative to absolute zero. The best efficiency comes when the input comes from a high temperature and the rejected heat goes to a cold temperature. Hot Cold Q H Q C W C HH 1 T W e QT == ( ) () C H 14 273 1 1 0.0304 3.04 % 23 273 K T e TK + =− =− = = + Problem 2 = Walker P. 18-55. The refrigerator in your kitchen does 510 J of work to remove 95 J of heat from its interior. Hot Cold Q H Q C W c Q COP W = (a) How much heat does the refrigerator exhaust into the kitchen?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/13/2010 for the course PHYSICS 111 taught by Professor Staff during the Fall '08 term at S.F. State.

Page1 / 2

ps15b40 - Ph 111.01 December 17, 2008 PS 15b (40) Problem 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online