Physics 20: Mrs. Tyler Assignment 16 133 Assignment 16 Unit D Module 2, Lesson 1: Properties of Mechanical Waves Lesson 1 of this assignment is worth 18 marks. The value of each question is noted in the left margin in parentheses. 1. The following terms need to be matched to their correct definitions. Write the letter of the corresponding definition beside the correct term. (6) Letter Term Definitions wave a) A continuous series of waves. b) A wave front moving away from a barrier. wave front c) An imaginary line joining all points reached by a wave at the same time. medium d) The material through which a wave travels. e) A disturbance that moves outward, incident wave transferring energy with vibrations. f) A wave front moving towards a barrier. reflected wave wave train a) Sketch two Slinky's: the first Slinky has a transverse pulse moving through it, and 2. the second Slinky has a longitudinal pulse moving through it. (You may want to use Figures 8.13 on p.401 and 8.17 on p. 404 from your textbook to help you.) (2)3 Physics 20: Mrs. Tyler Assignment 16 Unit D Module 2, Lesson 2: Wave Reflection Lesson 2 of this assignment is worth 15 marks. The value of each question is noted in the left margin in parentheses. 1. What can be said about the magnitude of the angle of reflection when compared to the angle of incidence? (1) 2. The angle of incidence and angle of reflection are always measured from the normal line. Earlier in the course, we learned about normal force. What does this term, normal, mean and how does that apply to a reflecting surface? (2 ) 3. Use the following diagram to answer parts a and b. 250 a) What is the angle of incidence? (1) b) What is the angle between the incident ray and the reflected ray? (1) ADLC All Rights Reserved (2019)Physics 20: Mrs. Tyler Assignment 16 b) Label each Slinky you drew as either longitudinal or transverse. (2) c) Label your Slinky(s) with the following terms (terms with an asterisk [*] must be included on both Slinky's): i. Crest ( 6) li. Compression iii. Trough iv. Rarefaction V . Amplitude vi. Wavelength* 3. The speed of sound in salt water is approximately 1500 m/s. Humpback whales can vocalize sounds that range from 30 Hz to 8000 Hz. What is the range of wavelengths that Humpback whales can vocalize? (2) After you have completed all questions in Lesson 1, please place your assignment in a safe place until you have finished Lesson 2. @ADLC All Rights Reserved (2019)