a) A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 ✕ 10−4°C−1). At room t
Posted: Mon Jul 18, 2022 5:54 am
a) A pair of eyeglass frames are made of an epoxyplastic (coefficient of linear expansion= 1.30 ✕ 10−4°C−1). Atroom temperature (20.0°C), the frames have circular lensholes 2.22 cm in radius. To what temperature mustthe frames be heated if lenses 2.23 cm in radius areto be inserted into them?
b) How many molecules of the gas are present if the volumeand temperature are the same as in part (a), but the pressure isnow 1.10 ✕ 10−11 Pa (anextremely good vacuum)?
b) How many molecules of the gas are present if the volumeand temperature are the same as in part (a), but the pressure isnow 1.10 ✕ 10−11 Pa (anextremely good vacuum)?