To not care as a negative dismissal is attested from mid-13c. Phrase couldn't care less is from 1946; could care less in the same sense (with an understood negative) is from 1966. Care also figures in many similies of indifference in the form don't care a _____, with the blank filled by fig, pin, button, cent, straw, rush, point, farthing, snap, etc., etc.
Beryllium metal is used in the aerospace and defense industries to make lightweight precision instruments. The mirrors of the Spitzer Space Telescope and the James Webb Space Telescope (JWST), which is scheduled for launch in 2018, are made of beryllium.
Beryllium metal is an electrical and thermal conductor. Beryllia, the ceramic of beryllium, is a thermal conductor and an electrical insulator. Both have very high thermal con â¦ ductivity relative to other metals or oxides.he surface of beryllium metal is covered with a â¦ thin layer of oxide that helps protect the metal from attack by air. It does not oxidize in air even at 600Â°C. However, powdered beryllium metal does burn in air to give a mixture of white beryllium oxide, BeO, and beryllium nitride, Be3N2.