A thin, round disk made of acrylic plastic with a uniform density of 1.1 g/cm is 20.0 cm in diameter and 1.0 cm thick. A very small hole is drilled through the disk at a point d = 7.0 cm from the center. The disk is hung from the hole on a nail and set into simple harmonic motion on the surface of Earth with a maximum angular displacement (measured from vertical) of 0 = 7.0. Calculate the period T of the motion. T= d