Explanation:
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The relationship between mass m, volume V and density d is:

The silver has density 

, and the mass of the piece of silver is 

. Therefore we can calculate its volume using the previous formula:
 
 
        
        
        
I think comets because they are small and they are composed of ice or water. Hope it helps :)
 
        
                    
             
        
        
        
Answer:
They will not meet
h-hX=1.2*g*t²
hX=v0*t-(1/2*g*t²)
Explanation:
fall h=1/2*g*t²
elevation time if v0=20 m/s  te=v0/g=20 m/s /9.81 m/s²=2.0387s
hmax=v0²/(2*g)=(400 m²/s²)/19.62 m/s²2=20.387 m
free fall
t=2.0387s yields hX=1/2*g*t²=20.387 m
h-hX=200m - 20.387 m=179,613 m.
so, the second body has not enough initianoal speed to reach a meeting point
 
        
             
        
        
        
B.) 100 N is the CORRECT answer
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