Question

The water passing over victoria falls, located along the zambezi river on the border of zimbabwe and zabia drops about 105 m. How much itnernal energy is produced per kilogram as a result of the fall?

Answer 1

Answer:

1029 Jkg⁻¹

Explanation:

$h$ = height dropped by the water falling = 105 m

$g$ = acceleration due to gravity = 9.8 ms⁻²

$m$ = mass of water

Using conservation of energy, the internal energy produced is same as the gravitational potential energy lost, hence

Internal energy = Gravitational potential energy

$U = mgh \\\frac{U}{m} = gh\\\frac{U}{m} = (9.8) (105)\\\frac{U}{m} = 1029 Jkg^{-1}$