If only magnesium were less expensive. According to researchers at the Pacific Northwest National Laboratory (PNNL), based in Washington State, USA, the magnesium used in the production of lightweight alloys for cars and aeroplanes is seven times more costly than the steel employed in the same applications.ccording to researchers at the Pacific Northwest National Laboratory (PNNL), based in Washington State, USA, the magnesium used in the production of lightweight alloys for cars and aeroplanes is seven times more costly than the steel employed in the same applications.
Definition of polemic for English Language Learners. : 1  a strong written or spoken attack against someone else's opinions, beliefs, practices, etc. 2  polemics : the art or practice of using language to defend or harshly criticize something or someone.
pole. 1. either extremity of any axis, as of the fetal ellipse or a body organ. 2. either one of two points which have opposite physical qualities.poÂ´lar. animal pole. 1. the site of an oocyte to which the nucleus is approximated, and from which the polar bodies pinch off.ccipital pole the posterior end of the occipital lobe of the brain. pelvic pole the end of the fetal ellipse at which the breech of the fetus is situated. temporal pole the prominent anterior end of the temporal lobe of the brain.