Gregor Mendel is considered the "Father of Genetics" because of his work with pea plants.
Kinetic energy per unit of mass is

Given, 
Therefore,


Now potential energy per unit mass is

Given, 
Therefore,


Thus, total mechanical energy of the river water per unit mass is


OR

Answer:
Explanation:
Newton's first law of motion.
Newton's second law of motion.
Newton's law of universal gravitation.
Law of conservation of mass.
Law of conservation of energy.
Law of conservation of momentum