Precision and accuracy are completely different concepts. Let's explore what they really mean, and how to tell the difference. 1  Resolution is the fineness to which an instrument can be read.  Precision is the fineness to which an instrument can be read repeatably and reliably.
1980s & 90s-High Performance Plastics. 1980 - First production of linear low density polyethylene. 1980 - First Blue HDPE pressure pipes for potable water introduced into UK. 1982 - First artificial heart made mainly of polyurethane, introduced implanted in a human.
Plastic bags are being banned or taxed in cities and counties across America. But Iâm not persuaded that plastic bag bans or taxes makes sense. Hereâs why. Theyâre not based on science. Independent studies show that plastic bags are environmentally preferable to paper. Others suggest that, when they are reused, they are preferable to the reusable plastic or cloth sacks that many of us tote around.