Fun Facts. 1  Table tennis has been an Olympic sport since 1988. 2  In professional table-tennis volleys, the ball can reach speeds as high as 90 miles per hour. 3  Table tennis is the national sport of China.  Table tennis is the second most played sport in the world, behind soccer.
In medicine this is used to document the patient's exertion during a test, and sports coaches use the scale to assess the intensity of training and competition. The original scale introduced by Gunnar Borg rated exertion on a scale of 6-20. Borg then constructed a category (C) ratio (R) scale, the Borg CR10 Scale. This is especially used in clinical diagnosis of breathlessness and dyspnea, chest pain, angina and musculo-skeletal pain.
Mechanical Anemometer. Credited with devising the first mechanical anemometer is Italian art architect and mathematician Leon Batista Alberti, in 1450. In his device, the wind pushed against a disk, and an accompanying scale gave a relative strength of the wind as shown by the angle of inclination of the disk.up Anemometer. A more advanced anemometer design using four cups attached by spokes to a central rod was invented by John Thomas Romney Robinson in 1846. Robinson was the director of the Armagh Observatory in Ireland. With his design, cups caught the wind and spun around faster the stronger the wind velocity.