Letters to the Editor

19472

Because the purpose of wind machines is to take energy out of the wind, it is counterintuitive to find the wind’s average velocity increases inside the wind farm. This is not what I learned in Aerodynamics I. Some clarification, please. John ToomayCarlsbad, Calif. Remember boundary layers. The wind speed at windmill level is higher than […]

19471

My response as an educator to much of the outrageous science depicted in so many of the recent blockbuster hits is very different from that of many of the scientists quoted in your article. The films provide a wonderful source of science projects that students actually relish. The more outrageous the science, the greater they […]

19470

I found your two articles on vitamin D very interesting.