1. For an ideal gas at a constant temperature, whichvariable change corresponds directly to how much work can beextracted from an engine process? Explain why.
2. You learned how the Doppler effect can be used toshow how sound waves will change their frequency when the sourceobject is moving. How can this knowledge be applied toward studyinghow stars move?
3. A lightning rod is a pointed copper rod mounted ontop of a building and welded to a heavy copper cable running downinto the ground. Lightning rods are used to protect buildings fromlightning; the lightning current runs through the copper ratherthan through the building. Why does it do this?
4. Some older cars have antennas that can be manuallyretracted and extended (changing the length). Suppose your frienddrives one of these cars and never extends the antenna. Explain tothem why this is not the best decision if they want their songs tocome in on the radio clearly.
5. Why is it that rainbows always show up with red onthe outside of the arc and blue on the inside? Can you have arainbow with its colors reversed?
