Consider a material whose microscopic cross sections in the thermal energy range are:
=2.7⋅10−24 cm2
=9.3⋅10−24 cm2
the density of the material is =19 g/cm3
and its atomic weight is =238 g/mol
the avogadro constant is =6.022⋅1023 mol−1
what is the total macroscopic cross section?
express your answer in units of cm−1

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line