Page 193 - The Ontario Curriculum, Grades 11 and 12: Science, 2008 (revised)

e2.3 plan and conduct inquiries to determine the speed of waves in a medium (e.g., a vibrating air column, an oscillating string of a musical in- strument), compare theoretical and empirical values, and account for discrepancies [IP, PR, AI, C]
e2.4 investigate the relationship between the wavelength, frequency, and speed of a wave, and solve related problems [PR, AI]
e2.5 analyse the relationship between a moving source of sound and the change in frequency perceived by a stationary observer (i.e., the Doppler effect) [AI]
e2.6 predict the conditions needed to produce resonance in vibrating objects or air columns (e.g., in a wind instrument, a string instrument, a tuning fork), and test their predictions through inquiry [IP, PR, AI]
e2.7 analyse the conditions required to produce resonance in vibrating objects and/or in air col- umns (e.g., in a string instrument, a tuning fork, a wind instrument), and explain how resonance is used in a variety of situations (e.g., to produce different notes in musical instruments; to limit undesirable vibrations in suspension bridges; to design buildings so that they do not resonate at the frequencies produced by earthquakes) [AI, C]
E. Understanding Basic Concepts
By the end of this course, students will:
e3.1 distinguish between longitudinal and transverse waves in different media, and provide examples of both types of waves
e3.2 explain the components of resonance, and identify the conditions required for resonance to occur in vibrating objects and in various media (e.g., with reference to a musical instrument, a child on a swing, the Tacoma Narrows Bridge)
e3.3 explain and graphically illustrate the principle of superposition with respect to standing waves and beat frequencies
e3.4 identify the properties of standing waves, and, for both mechanical and sound waves, explain the conditions required for standing waves to occur
e3.5 explain the relationship between the speed of sound in various media and the particle nature of the media (e.g., the speed of sound in solids, liquids, and gases; the speed of sound in warm and cold air)
e3.6 explain selected natural phenomena (e.g., echo location, or organisms that produce or receive infrasonic, audible, or ultrasonic sound) with reference to the characteristics and proper- ties of waves
WAVES AND SOUND
11
Physics
SPH3U