Problem: James is driving down the street in his town. For some reason today hes very curious about the things that he sees. He looks around as hes driving and the street lights catch his attention. He realizes that he's never seen someone changing the bulbs in a street light. He also wonders if its a film on the light that makes them have that color or something inside. Given a vapor light and a regular light bulb, which one is more energy efficient, the vapor light or the regular light bulb?

A: vapor light

Problem: John spends most of his time on computers. While at work his work computer does not need modern capabilities. So, he still uses Windows 2000 at his office computer. At home it's a complete different ball game. He plays so much computer games at home that he needs a better computer. In his home computer he installed the latest version of Windows. Now, there is no lag in his system. In which computer the idle thread will not run a loop of halt instructions, office computer or home computer?

A: home computer

Problem: Two meteorologists were good friends and discussed diverse issues weekly. This week they will talk again. Tim read about the Greenhouse Effect while Norm read about the mini-Ice ages. Which friend learned less about longer wavelength energy?

A: Norm

Problem: Bob and Bill studied at the same university. While Bob got into studying nutrition, Bill ended up studying about cancer and how to prevent it. Which student learned more about how to choose a sunscreen that offers the most protection?

A:
Bill