Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Ultrasonic, Infrasonic and audible waves travel through a medium with speeds `V_u, V_i` and `V_a` respectively, then - Sarthaks eConnect

Ultrasonic, Infrasonic and audible waves travel through a medium with speeds `V_u, V_i` and `V_a` respectively, then:

`V_u, V_i` and `V_a` are nearly equal

`V_u >= V_a >=V_i`

`V_u <= V_a <=V_i`

`V_a <= V_u and V_u ~~V_i`