O d. 42.0 m/s2 Clear my choice You are hiking to the top of a small canyon. When you stop for a rest you decide to shout "hello" across the canyon. You hear your echo 1.10 s after your shout. If sound waves travel at 340 m/s, how wide is the canyon? Select one: O a. 155 m O b. 187 m O c. 309 m O d. 374 m If the distance between two successive nodes in a vibrating string is 12.0 cm and the frequency of the source is 18.0 Hz, what are the wavelength (A) and speed (v) of the wave? Select one: O a. 12.0 cm; 1.50 m/s O b. 12.0 cm; 2.16 m/s O c. 24.0 cm; 2.00 m/s O d. 24.0 cm; 4.32 m/s Next page dle.phrd.ab.ca/mod/quiz/attempt.php?attempt=551646&cmid=554118&page=2#