Consider an acoustic wave encountering a fat/liver interface at normal incidence. what fraction of acoustic intensity (not pressure) is reflected back from the fat/liver interface at normal incidence? (you can take the acoustic impedances of fat and liver to be 1.35 x 10^6 kg m^-2 s^-1 and 1.66 x10^6 kg m^-2 s^-1 , respectively.) does it matter from which direction the incident energy arrives? why or why not?

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor