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.
The MercalliâCancaniâSieberg scale was later modified and published in English by Harry O. Wood and Frank Neumann in 1931 as the MercalliâWoodâNeumann (MWN) scale. It was later improved by Charles Richter, the father of the Richter magnitude scale.The scale is known today as the Modified Mercalli scale (MM) or Modified Mercalli Intensity scale (MMI).t was later improved by Charles Richter, the father of the Richter magnitude scale. The scale is known today as the Modified Mercalli scale (MM) or Modified Mercalli Intensity scale (MMI).