Physics

Problem

Water drops

100\,\text{m}

onto a turbine at a rate of

10\,\text{m}^3\!/\!\text{s}

. The turbine, generator, and transmission line have efficiencies of

85\%

90\%

, and

95\%

respectively. Calculate the electric power delivered to the grid (density of water

=1000\,\text{kg}\!/\!\text{m}^3

g=9.8\,\text{m}\!/\!\text{s}^2

). a)

8.3\,\text{MW}

9.8\,\text{MW}

7.1\,\text{MW}

7.5\,\text{MW}