Which of the following statements is NOT correct in regards to ocean power? a Th

Question

Which of the following statements is NOT correct in regards to ocean power? a The power output from sun and wind ore measured per unit length while wave power is measured per unit area. A wave can have an energy density of 50kw/m^2 in average North Atlantic Ocean. b. Tidal energy (global potential of 450 MWh) can by harnessed by trapping water in reservoirs behind dams and powering the air turbines C. A Wells turbine will spin in the same direction regardless of the water flow direction and produce electricity. D. A temperature difference of 60 degree F is necessary for practical ocean thermal energy conversion. e. The ocean waves are generated by the combined effects from the gravitational forces of the moon and centrifugal forces from the rotation of the earth. f All of these.

Explanation / Answer

Option (a) is incorrect because power output from sun and wind is measured per unit area while for wave power it us measured in per unit length.

Option (b) is correct because tidal energy is produced by trapping the water in reservoirs behind dam and and powering the air turbines.

Option (c) is correct because wells turbines are independent of direction of flow of water.

Option (d) is correct because approximately 60 Fahrenheit temperature is required for conversion of ocean thermal energy practically.

Option (e) is correct because gravitational force between earth and moon and the centrifugal force from the rotation of earth is responsible for the generation of ocean waves.

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