Determine the period of oscillations in Trial I. We recommend starting at the equilibrium position. Even though the video is shot at 30 frames per second, it may be challenging to find the frame where the "X" is exactly lined up with the equilibrium. Do your best. Did we mention that you need to find the period for Trial I? Enter your answer in seconds with two significant figures.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.