Problems 8, 9, & 10 refer to the 60 cm string, driven by a variable motor, portrayed in the figure on the right. When the motor drives the system at 45 Hz, the string creates the boel standing wave pattern shown. 60 cm 8. What is the wave speed for this medium? А. 60 m/s B. 48 m/s C. 30 m/s D. 18 m/s 8. 9. At what frequency should the motor be set to create a standing wave pattern with 5 anti-nodes (5 footballs)? А. 5 Hz В. 15 Hz С. 75 Hz D. 90 Hz 9. 10. By what factor should the tension in the string be increased in order to see only one football on the string (when driven at the same 45 Hz)? А. 3 В. 9 С. 1/3 D. 1/9 10.

Problems 8, 9, & 10 refer to the 60 cm string, driven by a variable motor, portrayed in the figure on the right. When the motor drives the system at 45 Hz, the string creates the boel standing wave pattern shown. 60 cm 8. What is the wave speed for this medium? А. 60 m/s B. 48 m/s C. 30 m/s D. 18 m/s 8. 9. At what frequency should the motor be set to create a standing wave pattern with 5 anti-nodes (5 footballs)? А. 5 Hz В. 15 Hz С. 75 Hz D. 90 Hz 9. 10. By what factor should the tension in the string be increased in order to see only one football on the string (when driven at the same 45 Hz)? А. 3 В. 9 С. 1/3 D. 1/9 10.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter15: Oscillations

Section: Chapter Questions

Problem 27P: Each piston of an engine makes a sharp sound every other revolution of the engine. (a) How fast is a...

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