Two mechanical test-probes, A A\,A and BBB, undergo simple harmonic motion. The time period of A A\,A is 0.55 s and the time period of B B\,B is 0.50 s. Both probes are released in phase at time t=0t = 0t=0.
What is the number of oscillations completed by B B\,B before A A\,A and B B\,B are next in phase?
101010
111111
121212
212121
