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.
Mach number is an indication of speed relative to the speed of sound. So Mach 1.3 means you're going 30% faster than the speed of sound.ource(s): Wikipedia Mach Number http://en.wikipedia.org/wiki/mach_number... NASA Mach number http://www.grc.nasa.gov/www/k-12/airplan... Report Abuse It was first used by Sir Ernest Mach who is credited with mesureing the speed of sound.