318 -83- 



STOffilARY OF FORMULAS 



!• Scaling factors (for T. N. T. ) : 



1/3 

 L = 13,2 14^1 ft. 



(1) 



wV3 

 C = 2.85 -^ sect 



D ^6 



where W = weight of T. N. T. in lbs., D = distance, in feet, 

 of the explosion from a point 33 ft. above sea level. 



2. Period of pulsation: 



wV3 

 T = 1.47C = 4.19 e ,^ sec. 



In the absence of outside influences; if the bubble is at a 

 distance b from a rigid wall, this is to be multiplied by 



^o 



3. Maximum radius : 



If the internal energy of the gas is neglected, the 

 maximum radius of the bubble is L. If the internal energy is 

 allowed for, the maximum radius is a^L, where a. is the 

 largest root of a"^ + "k/i ~ "'■' ^"^ ^ ^^ given by the formula 

 k = .0607 dV^ . 



4. Non-dimensional momentum at time of minimum size: 



The momentum due to gravity and a rigid bottom is 



