Ch. 25 Waves. HW 1-16. Ch. 25.1-25.2. 1. A vibration causes a wave and a wave spreads out through space. 2. The period would be 1 second. 3. The pendulum would take 1.5 seconds. 4. A longer period is produced by a longer pendulum
7. Period is the time it takes for one complete cycle of a wave (seconds); the frequency is the number of waves that pass a single point per unit time or the number of vibrations per second (Hertz)
A weight attached to a spring undergoes simple harmonic motion.
A marking pen attached to the bob traces a sine curve on a sheet of paper that is moving horizontally at constant speed.
A sine curve is a pictorial representation of a wave.