Answer:it might be radiation 
Explanation:
        
                    
             
        
        
        
C,d,or e you can use the process of elimination to decide...
        
                    
             
        
        
        
Answer:
The final velocity of the wooden block is equal to 
Explanation:
Given that mass of bullet =  
 
                 Mass of wood = 
                Initial velocity of bullet = 
               Final velocity of bullet = 
                Initial velocity of wood = o
                Final velocity of wood = ![v_{w]](https://tex.z-dn.net/?f=v_%7Bw%5D)
    Here momentum is conserved so initial momentum = final momentum 
              .
 .
     Upon substituting these values in above equation , we get
          .
.
 
        
             
        
        
        
Answer:
A
Explanation:
because newton's second law states that if a resultant force acts on an object then, it will accelerate in the direction of the resultant force 
 
        
             
        
        
        
Answer:
<em> B.0</em>
Explanation:
Change in momentum: This is defined as the product of mass and change in velocity of a body. or it can be defined as the product of force and time of a body. The fundamental unit of change in momentum is kg.m/s
Change in momentum = M(V-U)......................... Equation 1
where M = mass of the ball, V = final velocity of the ball, U = initial velocity of the ball.
Let: M = m kg and V = U = v m/s
Substituting these values into equation 1
Change in momentum = m(v-v)
Change in momentum = m(0)
Change in momentum = 0 kg.m/s
<em>Therefore the momentum of the ball has not changed.</em>
<em>The right option is B.0</em>