Stark contrast to paths on energy surfaces or even mechanistic reactions, rule-based and inductive computational approaches to reaction prediction mostly consider only overall transformations. Overall transformations are general molecular graph rearrangements reflecting only the net change of several successive mechanistic reactions. For example, Figure 1 shows the overall transformation of an alkene interacting with hydrobromic acid to yield the alkyl bromide along with the two elementary reactions which compose the transformation.
        
             
        
        
        
The answer might be B because the value is negative, and negative could mean slowing down. 
 
        
             
        
        
        
Answer:
buoyant force on the block due to the water= 10 N
Explanation:
We know that
buoyant force(F_B) on a block= weight of the block in air (actual weight) - weight of block in water. 
Given:
A block of metal weighs 40 N in air and 30 N in water.
F_B =  40-30= 10 N 
therefore,  buoyant force on the block due to the water= 10 N
 
        
                    
             
        
        
        
Answer:
original mass of the block of ice is 38.34 gram
Explanation:
Given data 
cup mass = 150 g
ice temperature = 0°C
water mass = 210 g
water temperature = 12°C
ice melt = 2 gram
to find out 
solution 
we know here
specific heat of aluminum is c = 0.900 joule/gram °C
Specific heat of water C =  4.186 joule/gram °C
so here temperature difference is dt =  12- 0 = 12°C 
so here heat lost by water and cup are given by 
heat lost  = cup mass × c  × dt + water  mass × C × dt
heat lost  = 150 × 0.900  × 12 + 210 × 4.186 × 12
heat lost  = 12168.72 J
so
mass of ice melt here = heat lost / latent heat of fusion
here we know latent heat of fusion = 334.88 joule/gram
so 
mass of ice melt  =  12168.72 / 334.88
mass of ice melt  is 36.337554 gram
so mass of ice is here = mass of ice melt + ice melt
mass of ice  =  36.337554 + 2 
mass of ice  =  38.337554 gram
so original mass of the block of ice is 38.34 gram
 
        
             
        
        
        
Answer:
a
   
b
  
Explanation:
From the question we are told that 
   The initial position of the particle is  
   The initial  velocity of the particle is  
   The acceleration is   
    The time duration is  
Generally from kinematic equation 
     
=>  
=>  
Generally from kinematic equation
    
Here s is the distance covered by the particle, so
    
=>  
Generally the final position of the particle is  
     
=>   
=>   