The rate of heat conduction out of a window on a winter day is rapid enough to chill the air next to it. to see just how rapidly the windows transfer heat by conduction, calculate the rate of conduction in watts through a 3.0-m2 window that is 0.635 cm thick (1/4 in) if the temperatures of the inner and outer surfaces are 5.0ºc and −10.0ºc , respectively. this rapid rate will not be maintained—the inner surface will cool, and even result in frost formation.

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.