A 0.5 m long string with a linear mass density of 0.005 kg/m is supported between two stands and plucked causing it to vibrate. What is the frequency of the second mode if the tension of the string is 200 N

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.