【简答题】A bimetallic strip is constructed from strips of two different metals that are bonded along their lengths. Explain how such a device may be used in a thermostat to regulate temperature. What is the di...
【单选题】Some car paints contain small flakes of silica, SiO 2 . In the structure of solid SiO 2 ● each silicon atom is bonded to x oxygen atoms, ● each oxygen atom is bonded to y silicon atoms, ● each bond is...