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.
THE END! The Inventor James Watt substantially improved on Newcomen's model and patented his own steam engine in 1769. Steam engines had previously depended on atmospheric pressure to push a piston (a sliding piece of metal moved by pressure) into a cylinder (a hollow tube) and create a vacuum by the cooling steam.