1. Quizdom Practice Do I need to show work for calculation problems and justify answers for verbal questions? A.Always B.Always when Dr. Vogel will be grading it (even WebAssign essay questions) C.Always when the computer will be grading it D.Never

2. EM Waves AM radio waves have a lower frequency than FM radio waves. AM waves thus have ___ period and ___ wavelength. A.shorter, shorter B.shorter, longer C.longer, shorter D.longer, longer

3. PAL Everyone up and out in the hallway.  Form three lines at the yellow tape.  Every three seconds, the front people in each line should start walking slowly toward the blue tape.  Note the distance between you and the person in front/behind you while you are all walking slowly. Write it here: – this is like a wavelength  When you get to the blue tape, start walking quickly.  Note the distance between you and the person in front/behind you while you are all walking quickly. Write it here: The “wavelength” is _____ (longer, shorter, the same) when you are moving more slowly.