1kg of air at 1.013 bar, 17 °C, is compressed according to a law pv1.3= constant, until the pressure is 5 bar. 1-Calculate the change of entropy and sketch the process on a T-s diagram, indicating the area which represents the heat flow.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories