335 



Section I 

 Summary of Formulas 



Units of Length and Time 



Let A be the radius of the bubble at time T, B the 

 distance of Its center from the bottom, and H the dis- 

 tance from the surface. V/e put Z = H + 7i" , where Z" Is 

 the height of the water colvmm whose pressure equals at- 

 mospheric pressure, so that the hydrostatic pressure at 



Uoizrsur/cK. 



&' 



B 



A bofiom 



the center of the bubble Is pgZ. 



Let E be the amount of energy left In the bubble 

 after the shock wave has passed and let M be the mass of 

 the explosive. We write E = rQM so that rQ is the amo\int 

 of energy per unit mass of explosive left in the bubble 

 after the shock wave has passed. 



All the formulas will be given in dimensionlesa 

 terms. The unit of length is 



(1.1) L = (SEATrpgZo)-"-/^ 



where Z is the value of Z at the time of detonation, 

 o 



The unit of time is 



