Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES)
Two wires are in unison. If the tension in one of the wires is increased by 2%, 5 beats are produced per second. The initial frequency of each wire is:
A. |
200 Hz |
B. |
400 Hz |
C. |
500 Hz |
![]() |
D. |
100 Hz |