1273 
the reflected shock. 
Here we are interested 
only in the part OEF of the 
region Mp; and so only the 
first representation of 
4 in (19.5) will be carried. 
The quantities ug,Cce, and Q, 
are now readily found. 
saliva soi) temp! 
Cult = 
ih dale’, x <1-t (19.6 
B 2 
pores it Yai ztt-1 x<l-t (19.7 
yr Een 
B 2 
Sas es eS Gl ek 
Q, = 2 [v= picer i F a | x<€l-t (19.8 
With these expressions the problem is solved in Moe 
20. The situation in the region M is more difficult; 
for although the boundary conditions on D are known, the 
position of D is unknown. In the approximate form which is 
adequate here the shock equations are (15.6) and (15.7). 
These two equations contain five variables: u,, co, u, c, and s. 
Now u, and c, have been found in (19.6) and (19.7). There is 
Mer 
