W7b__Pre-Lab_Quizzes_3_attempts3LBBasic_Physics_Lab_II

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Cypress College *

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PHYS-202

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Physics

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Apr 3, 2024

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2/20/24, 8:45 AM W7b: Pre-Lab Quizzes (3 attempts): 3LB: Basic Physics Lab II https://canvas.eee.uci.edu/courses/61657/quizzes/315036 1/4 W7b: Pre-Lab Quizzes (3 attempts) Due Feb 23 at 11:59pm Points 7 Questions 3 Available Feb 20 at 8am - Mar 14 at 11:59pm Time Limit None Allowed Attempts 3 Instructions Attempt History Attempt Time Score LATEST Attempt 1 9 minutes 7 out of 7 Score for this attempt: 7 out of 7 Submitted Feb 20 at 8:45am This attempt took 9 minutes.  Question 1 3 / 3 pts The weekly pre-lab is due before the beginning of your Lab session. The problem sets will be open for one week prior to the due date. Any technical problems with the website (e.g. trouble logging on) should be reported to the OIT Help Desk staff. (https://www.oit.uci.edu/helpdesk/) If you have questions about grading or mistakes in the quiz, contact your Instructor and/or TAs. NOTE: In this Quiz, you will have THREE Attempts. Take the Quiz Again THE EAR READING 1 The function of the ossicles in the middle ear is to transmit the vibrations of the tympanic membrane caused by sound waves propagated in air to the fluid-filled cochlea. In doing so, the ossicles change the nature of the vibrations. The ear tries to conserve the energy in the wave I,

2/20/24, 8:45 AM W7b: Pre-Lab Quizzes (3 attempts): 3LB: Basic Physics Lab II https://canvas.eee.uci.edu/courses/61657/quizzes/315036 2/4 Correct! 57.2 Correct Answers where v is the wave speed, ρ is the density of the medium, v is the frequency of the wave and A is the amplitude of the wave. Calculate the ratio of the amplitude of the wave in air to the amplitude of the wave as it propagates through the cochlea. The density of air and water is 1.3x10−3g/cm3 and 1.0g/cm3, respectively, and the velocity of sound is 331 m/s in air and 1410 m/s in water. The frequency of the wave remains constant as the wave propagates. Please round your answer to one decimal place . (Hint: Begin with to find .) _______________________________[Answer} The bones in the middle ear actually give a reduction of only about 22. This figure should differ from the number you found, but remember that our calculations are only approximate and did not take into account stiffness of membranes and other factors. [10]. [10] Leonard H. Greenberg, PHYSICS FOR BIOLOGY AND PRE-MED STUDENTS, (Philadelphia: W.B. Saunders Co., 1975).

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