Help with 19,22

location where the acceleration due to gravity What is the spring constant of a spring that oscillates with a frequency of . 85Hz and is carrying a mass of 2.4kg? 68N/m 20. A 1.25kg mass on a spring with a constant of 12.0N/m is oscillating back and forth. Its maximum speed is 2.5m/s. What speed will it have when it is 0.48m from equilibrium? 2.0m/s 21. You and a friend are in a wave pool, and are 6.0m apart. When you are on a crest, so is your friend and there are 3 crests in between you. If you move up and down completely in 0.75 seconds, what is the speed of the waves? 2.0m/s 22. ) A closed air column is resonating with a fundamental frequency of 200Hz in a room where the air temperature is 0.00 C. How long is the tube? 0.415m