A string of 2.74 g and 82 cm in length is attached at one of its ends to one of the arms of a tuning fork with a frequency of 326 Hz that generates electrically operated waves with an energy per unit of time of 24 W. The other end passes through a pulley and supports a mass of 136.5 kg. Use 9.8 m/s2 as the value for the acceleration of gravity. The propagation speed of this wave and the maximum acceleration of the particles on the string is: