For a lead–tin alloy of composition 80 wt% sn– 20 wt% pb and at 180°c (355°f), do the following: (a) determine the mass fractions of the α and phases. (b) determine the mass fractions of primary and eutectic microconstituents. (c) determine the mass fraction of eutectic

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Which branches of natural science include the study of an organism that lived 10 million years ago

Avoltaic cell converts chemical energy to