Goldie Hawn had a career that lasted 34 years.
The tip-speed ratio , X , or TSR for wind turbines is the ratio between the tangential speed of the tip of a blade and the actual speed of the wind , .. speed. speed. The tip-speed ratio is related to efficiency , with the optimum varying with blade design .. speed. speed. Higher tip speeds result in higher noise levels and require stronger blades due to large centrifugal forces .. The tip speed of the blade can be calculated as times R , where is the rotor rotational speed in radians / second , and R is the rotor radius in meters .. speed. speed. Therefore , we can also write  :. when wind speed is specified in meters / second .. speed. speed