Vodafone Group Plc (VOD) is a British multinational telecommunications based out of Newbury, Berkshire, England. Founded in 1991, Vodafone offers a wide range of products and services across the globe. It operates in over 30 countries and partners with over 40 markets worldwide.
Originally Answered: What is a Mach number? It is the ratio of velocity of an object to the velocity of sound. If the Mach no is one then object is moving with the velocity of sound.
Nevertheless, we have pointed out that Mach number is independent of ground speed or wind speed and depends only on the plane's speed relative to the local airflow. Mach number is defined as the ratio of airspeed (V) to the speed of sound (a) at that altitude.