A system of mass 10 kg undergoes a process during which there is no work, the elevation decreases by 50 m, and the velocityincreases from 15 m/s to 30 m/s. The specific internal energy decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.8m/s². Determine the change in kinetic energy, in kJ, and the amount of energy transfer by heat for the process, in kJ.