Physics: Principles and Problems

Chapter 21: Electric Fields

Problem of the Week

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078458137/193800/ch21_title.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>
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<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0078458137/193800/POWproblem1.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a> There are a wide variety of potential applications, here is a sample:

Computer security devices could automatically log users on and off. Subway and bus commuters could pay for a ride just by walking through a turnstile. As you sit down to watch TV, you touch the remote which automatically flips to your favorite station and resets all the preset stations. A toaster could be informed of how dark you like your toast as you slide the bread in.

 
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