plz answer me fast
Solution:
3) Pitch of a high-frequency sound is High.
option d is correct.
4) Minimum distance an obstacle needs to be at to hear an echo is 17 meters.
Option b is correct
3) Pitch of a high-frequency sound is High.
option d is correct.
4) Minimum distance an obstacle needs to be at to hear an echo is 17 meters.
Option b is correct