Explanation:
The solution is be found in the attachment.
 
        
             
        
        
        
Answer:
The bullet's initial speed is 243.21 m/s.
Explanation:
Given that,
Mass of the bullet, 
Mass of the pendulum, 
The center of mass of the pendulum rises a vertical distance of 10 cm.
We need to find the bullet's initial speed if it is assumed that the bullet remains embedded in the pendulum. Let it is v. In this case, the energy of the system remains conserved. The kinetic energy of the bullet gets converted to potential energy for the whole system. So,
 
 
V is the speed of the bullet and pendulum at the time of collision
Now using conservation of momentum as :
 
 
Put the value of V from equation (1) in above equation as :

So, the bullet's initial speed is 243.21 m/s.
 
        
             
        
        
        
"<span>An atom is the smallest unit of matter and an element is a pure substance that is made of identical atoms" is correct. Although atoms can be broken down further now, it still take a whole atom to make an element. </span>
        
             
        
        
        
The tape is charged by friction and her hand has an induced opposite charge. They therefore attract.
 
        
                    
             
        
        
        
Its a proces of combustion "burning"humans produce carbon dioxide,rocks<plants whatever is burning energy