910 
and hence 
tn = - en VM/k (I-10) 
Combining Eqse (I=-9) and (I-10), 
a Bs aay (I-11) 
5- Square Wave: F(t) = F H(t) - F H(t - t,) | | 
0 t, — +t 
In this case, Eq- (I-58) becomes 
al F 1 F 
De + oF i arr BF a ena (I-18) 
If t, > ‘ (see Eqe Iel0), the situation reduces to that developed in 
Section 4 of this appendix, as the deformation of the gauge is complete before 
the time t, of pressure cut-off. 
Ift,< =, 
x= 2 (1 ~ 008 ot) a(t) - Z [2 ~ con a(t = to) | H(t = t,) (I-13) 
When t > to» Eqe (I-13) can be rewritten: 
x == [ 208 a(t - t,) = cos at] 
x == (cos @t cos at, + sin ot sin at, = cos at) (I-14) 
To find Xn and t,: 
i= > [sin ot, cos wt, = (cos at, = 1) ain aty | = 0 
-95= 
