.TRANSFORM.HeatAndMassTransfer.Examples.ExamplesFrom_NellisAndKlein.Example_1_7_1_BentBeamActuator.part_a_AppropriateToUseExtendedSurface .TRANSFORM.HeatAndMassTransfer.Examples.ExamplesFrom_NellisAndKlein.Example_1_7_1_BentBeamActuator.part_a_AppropriateToUseExtendedSurfacepart a) Determine if it appropriate to use an extended surface