Measuring Simple Harmonic Motion L. A spring-mass system vibrates exactly 10 times per second. Find its period and its frequency 2. A pendulum swings with a period of 0.20 seconds. a. What is its frequency? b. How many times does it pass the lowest point on its path in 1.0 second? in 7.0 seconds? 3. A spring-mass system completes 20.0 vibrations in 5.0 seconds, with a 2.0 cm amplitude. a. Find its frequency and its period. b. The same mass is pulled 5.0 cm away from the equilibrium position, then released. What will the period, the frequency, and the amplitude be? 4. A pendulum completes 30.0 oscillations per minute. Find its frequency, its period, and its length. Properties of Waves 1. Radio waves travel at the speed of light (3.00 x 10 m/s). An amateur radio system can receive radio signals at frequencies between 8.00 MHz and 1.20 MHz. What is the range of the wavelengths this system can receive? 2. Graph (a) below describes the density versus time of a pressure wave traveling through an elastic medium. Graph (b) describes the density versus distance for the same wave. 0.00 0.01 0,02 0.03 0.04 0.00 20.00 40.04 60,00 80.00 Distance and a. Use graph (a) to find the period of oscillation of this wave and its frequency. b. Use graph (b) to find the wavelength and the speed