In a similar application than wind turbines, marine turbines transform the rectilinear momentum available in marine flows and tides to electric power. Marine turbines are designed using the same principles as wind turbines. However, because they are used in different flow conditions, the variables used in the power equation are also slightly numerical different. As the marine turbine works in water rather than air, we will use density of water instead of air: Density of water is rhow = 1000 kg/m3. A rated tidal flow speed of v=2.5 m/s is considered typical in geographic regions with attractive marine flows. The average power coefficient, Cp , for marine turbines is also different than that of wind turbines. Currently, the technology for marine turbines is not that much developed to reach the same levels of results as wind turbines. However, the theoretical maximum for marine turbines which is still defined by Betz Law has a limit value of 0.59. In practice, it is acceptable to estimate the power Coefficient for Marine Turbines as 〖Cp〗_m=0.35. Given this information, rearrange the power equation using marine turbine variables to calculate the length of a marine turbine blade that would be needed to produce the same power by the marine turbine as the power produced by the wind turbine in the example in our lecture (1.5 MW).