Period = 0.5 second is the answer.
        
             
        
        
        
Answer:
Hi, There!
O 10 m/s
O 10 yd/s
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Have a great day!
 
        
             
        
        
        
I guess it is a: seismic waves
        
             
        
        
        
<span>it would bond to the phosphate 
</span>
        
                    
             
        
        
        
External = R
Internal = r
Volume of hemisperical = 2/3 π(R³-r³) 
V= 2/3 π(9.1³ - 8.4³) 
V= 336.9 cm³