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.
It is called Mach 1. Mach numbers are given to fast airplane speeds rather than miles per hour. They indicate the ratio of the speed of sound to the speed of the plane. Mach 2 is twice, and Mach 3 is three times the speed of sound. Through ordinary air, the speed of sound is about one mile in five seconds, but it varies with temperature. < Prev.