Торонто: Список сеяных теннисисток

Brad Gilbert 5 mins · I love it when tennis fans drop proper knowledge. Always interesting to know the science behind play. Take in all factors when hitting the ball and commentating on it. Good to know. Read this from #FanInfo #MuchRespect info@bradgilberttennis.com Brad, I am listening to you today broadcasting at the Atlanta tournament, just finished watching the Isner-Muller match. As a chemical engineer roughly your age (60), I would like to explain the physics of what makes air relatively heavy or light. You were stating on TV that the humid air in Atlanta is heavier than a place with less humidity. This is not always the case, so let me explain. The only thing that matters in calculating the relative heaviness of air is its total pressure. While it is true that a cubic foot of dry air weighs more than a cubic foot of humid air at the same temperature, what this really means is that its density, hence pressure per square inch, is higher. However, air pressure is affected by temperature, humidity, and altitude. If the U.S, Open were held in Denver, Isner would be practically unbeatable. Even in Atlanta, at a little over 1000 feet, the air pressure and density is lower than, say, in New York City at sea level. Also, humid air at the same total pressure is less dense than dry air. This is because water molecules have a molecular weight of 18 while nitrogen is 28 and oxygen is 32. As you know, baseballs fly out of the park at Coors Field in Denver. To a lesser extent in Atlanta at 1000 feet, the air densisity is less than other humid places at sea level. This helped Hank Aaron hit a few more home runs than he would have playing at most major U.S. cities. Denver is the obvious exception, but even the altitude in Minneapolis is about the same as Atlanta, hence a better place to hit home runs. Seattle, ... is the hardest place to hit home runs because it is a sea level and the air is colder than any other MLB city on average over the course of the season. Ditto not a place for your long field goal record, hitting a golf ball fare, etc. I’ve thoroughly enjoyed listening to your commentary over the years and we have your Winning Ugly book in our house. I hope this explanation makes sense and improves the accuracy of your discussions about heavy or light playing conditions. Thank you. DB

Почему рано? И какое отношение имеет спортивная форма игроков к списку сеяных? Как раз сейчас время - сегодня определились сеяные.

Выставил этот текст, потому что он исправляет общепринятое мнение, которое Гилберт выразил на ТВ.