If We Model Each Of These Two Blades As A Thin Uniform Steel Bar 15 0 Rm M Long

If we model each of these two blades as a thin uniform steel bar 15.0 {rm m} long and 25.0 {rm cm} in diameter, at what rate (in {rm rad/s} and {rm rpm}) must they spin for the turbine to store 1.00 {rm MJ} of energy? The density of steel is 7800 {rm{{rm kg}/{rm m}}}^3 .

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