frac{\text{1}}{\text{440 Hz}}\) T = 0.0023 s = 2.3 x 10-3 s or 2.3 ms. The period of vibration is 0.0023 s. There are three equations for calculating frequency: \(\text{frequency f =}~\frac{\text ...

Amplitude = \(\frac{52 ... T = 0.0023 s = 2.3 x 10-3 s or 2.3 m/s. The period of vibration is 0.0023 s.

In early reporting, Portugal’s grid operator REN was quoted as blaming the event on a rare phenomenon known as “induced ...