(B-U) 



418 



The inversion of the Laplace transform gives 



C>o 



where „ Ci>c«o , ^ - 



"Wie function Q^ Lt ) can also be written 



In the case of an e xponential wave, 



P^Ct) ^ Y^e.-^^^ ^ t>o, (B-13) 



Eq, (B-12) becomes 



^^ct^;, -.fi ^ ^ , (3_^) 



In this case the complete expression for x is 



CO 



where I = p»^© and ^^Ct) is given by (B-li+). 



99 



