PHYS 217 Heat, Light, and Sound Fall 2007
Dr. Boris Kiefer
Homework 11
Handed out: 11/02/07
Due date: 11/09/07 before class
Textbook: R. D. Knight; Physics for Scientists and Engineers
Chapter 17:
Problems: 5, 19, 23; 25; 66.
Additional problems:
Problem 1: A “typical” adult male consumes about 2500 kcal of food in a day. If this
consumed energy is dissipated over the course of 24 hours, what is the average output
power in watts?
Problem 2: A well insulated bucket contains 150 g of ice at 0oC. (a; 1 Point) If 20 g of
steam are injected into the bucket, what is the final equilibrium temperature of the
system? Is any ice left afterwards?
Problem 3: One mole of an ideal gas is heated while its volume changes, so that
2
P
A
T
⋅= , where A is a constant. The temperature changes from T0 to 4*T0. Find the
work done by the gas. Express your result in terms P0, V0, the pressure and volume at
temperature T0.