Question: Wind turbines designed for offshore installations are much larger than ones designed for use on land. One company makes a turbine for use on land

Wind turbines designed for offshore installations are much larger than ones designed for use on land. One company makes a turbine for use on land with blades $40 \mathrm{~m}$ long that spin at $17 \mathrm{rpm}$, and a turbine for use offshore with blades that are twice as long. At what rate should the blades of the offshore turbine rotate if the speed at the tip is to be the same as that of the turbine on land?

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