25 



Detonator Figures, 



The following is the information furnished ty the makers concerning the detonators used. 

 The amount of explosive used is 1 gm., part of wnicn is lead aiide. The volume of gas foVmed, at 

 N.T.P., is 300 CCS. The initial temperature 0^^ is3000°C ( = 3273° k) . The effect ive value 

 of y is 1.3. 



The value of p is not given, but, once the initial volume v is known, it may be deduced 

 from the equation of state (13). In this equation m is readily determined, for one gm. molecule 

 of any gis at N.T.P. occupies 22 litres, so that the 300 ccs. of gas resulting from the explosion 

 Cirrcspjnl tc a vdlue 



„ = -122. = 0.0136. 

 22000 



The Value jf v , is n^t given. Out is estimated to be ab::ut 1 cc. Inserting these values in (l3) 



p^ = 3700 X 10° dynes/cm\ 



The accuracy jf this value d'^p^'nas on the accuracy with which v is known. 



P V 

 The totil mechanical energy of the Jetonator explosion is, from equation (lu), -^ — 2 



m R0 

 Dy reason of equation (13) this can be written _ ^ . On substituting the values 

 for m, 9^ and y already quoted, a figure of 1200 Joules is obtained for the energy of the 

 a.jtooator. 



