A 310 g mass vibrates according to the equation x = 0.4sin(6.5t), where x is in meters and t is in seconds. [Recommended time: 4-5 minutes] (a) the amplitude (m) Oa. 0.2 Ob. 0.4 Oc. -0.4 Od. 6.5 Oe.-6.5 (b) the frequency (/s) Oa. 1.03 Ob. 0.967 Oc. 40.8 Od. 6.5

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