the s-wave shadow zone is evidence of which boundary or property of earths interior
Shadow zone The reason for this is that the velocity for P-waves and S-waves is governed by both the different properties in the material which they travel through and the different mathematical relationships they share in each case. The three properties are: incompressibility (  k  {\displaystyle k} ), density (  p  {\displaystyle p} ) and rigidity (  u  {\displaystyle u} ). P-wave velocity is equal to    ( k +  4 3  u ) / p   {\displaystyle {\sqrt {(k+{\tfrac {4}{3}}u)/p}}}  whereas S-wave velocity is equal to    ( u / p )   {\displaystyle {\sqrt {(u/p)}}}  and so S-wave velocity is entirely dependent on the rigidity of the material it travels through. Liquids, however, have zero rigidity, hence always making the S-wave velocity overall zero and as such S-waves lose all velocity when travelling through a liquid. P-waves, however, are only partially dependent on rigidity and as such still maintain some velocity (if greatly reduced) when travelling through a liquid.[4] Analysis of the seismology of various recorded earthquakes and their shadow zones, led geologist Richard Oldham to deduce in 1906 the liquid nature of the Earth's outer core.[5]
Pulse Pressure waves generated by the heart in systole move the arterial walls. Forward movement of blood occurs when the boundaries are pliable and compliant. These properties form enough to create a palpable pressure wave.
Limit of a function (the Dirichlet function) has no limit at any x-coordinate.
Backshore Sediments in this area are well-sorted and well-rounded. Its grain sizes are mainly coarse sand and medium sand, which are larger than that in littoral barrier dune.The sedimentary structures include parallel bedding and low-angle cross-bedding.