In terms of relative length of units, a yoctometre ranks as follows: Planck length yoctometre zeptometre. A yoctometre is 1/1000 of a zeptometre (1 zeptometre (zm) = 1,000 yoctometres). The yoctometre,is the distance light travels in about:1Ã·2.99Ã10 35 seconds.
Engines of various sorts have been invented over the last two or three centuries. 1  In 1698, English military engineer, Thomas Savery, invented and patented the first crude steam engine, based on Denis Papin's Digester (pressure cooker) of 1679.
Steam engine. New machines that were introduced during the Industrial Revolution needed more and more power to work. Up to the 18 th century England got most of its energy from waterwheels that were run by the flow of rivers. In the 1760s the Scottish engineer James Watt invented the steam engine.