PPT-Today : Chap 19 (Vibrations and Waves

Looking ahead Midterm 2 Nov 18 on Chs 9 11 13 14 15 19 20 22 probably Vibrations Some Preliminaries Vibration oscillation anything that has a backandforth to it Eg Draw a pen back and forth over the same line repeatedly. Pages 8-12. 1. . A rhythmic . disturbance that carries energy but . not matter.. 2. A type of wave that can travel only through matter.. 3. Material through which a wave travels. This can be a solid, liquid, or a gas.. By Rhett Price. Speed of Sound . Speed of sound depends on density. Correlation between speed and density. Not as fast as light speed. Also affected by pressure and temperature. Positive correlation between them. 13. . Key words: Vibrations, Waves, Vibrational Motion, Periodic Motion, Simple Harmonic Motion, Restoring Force, Hook’s Law, Amplitude, Period, Frequency, Phase Angle, A ngular Frequency, What’s that you say? . Anatomy is . your favorite class? Not surprising. . The Ear. Complex organ consisting of outer, inner, and middle regions. Outer . Ear = . transmits . sound . waves through . Introduction. Ears are sense organs that respond to sound.. Your ear converts sound waves into nerve impulses that your brain interprets.. The ear’s structure is designed to receive and transmit the sound waves.. Periodic Motion – any repeated motion with regular time intervals. Simple Harmonic Motion – vibration about an equilibrium position in which a restoring force is proportional to the displacement from equilibrium . . [3]. resonance . clocks – pendulum . springs . harmonic motion . mechanical waves . sound waves . The periodic wave relation. Wave interference. standing waves. beats. musical instruments. 1. Review. Hooke’s Law. When a spring is stretched, a restoring force is created.. The restoring force is proportional to the displacement . The restoring force is always directed toward the equilibrium point. Explain how force, velocity, and acceleration change as an object vibrates with simple harmonic motion.. Calculate the spring force using Hooke’s law.. OBJECTIVES. What is periodic motion?. A repeated motion (e.g. pendulum swinging) that is back and forth over the same path.. Physical Science . FORMS OF ENERGY. TOPIC VII. SC.K.P.10.1. SOUND. Grade K Pacing Guide: Forms of Energy . Sound/Practice of Science Benchmarks. SC.K.P.10.1: Observe that things that make sound vibrate.. Wave. particles vibrate parallel to the direction of the motion of the wave. Terminology. Compressions. : areas where particles come closer together. Rarefactions: . regions where particles are further apart. . Sound . (Ch 20) . . . Preliminaries. What is the origin of sound? . . Vibrations. of . objects, e.g. . of a string, of a reed, of vocal cords... Usually the small vibration stimulates vibration of a larger object . Periodic Motion. Motion that repeats in a regular cycle is called . periodic motion. . . The revolution of a planet about its sun is an example of periodic motion. The highly reproducible period (T) of a planet is also called its year.. Gregory L. Vogt, EdD. Center for . Educational Outreach. Baylor College of Medicine. What Is Energy?. Energy is hard to define because it changes form. Energy causes a change in the condition of matter, or state changes (such as burning a candle). Or it also can mean movement (such as a vibration or change in physical location). .