1) 4min = 4*60 sec = 240 sec
2) Distance = speed times time = 3 * 240 = 720 m
        
             
        
        
        
Answer: Limiting reactant
Explanation:
The limiting reactant is a reactant will get completely consumed up in the reaction. This reactant being in low concentration will lead to the formation of limited amount of product. 
In the given situation, since the butter cakes are required to be 3 sticks for making 3 cakes but only 2 cakes are available thus the butter stick is the limiting reactant. 
 
        
             
        
        
        
C. Magnetic draws certain types of metal together.
        
                    
             
        
        
        
Answer:
1.57 s
Explanation:
Since the motion of the hammer is a uniformly accelerated motion, the distance covered by the hammer in a time t is

Where, in this case
S = 2.0 m is the distance covered
a = 1.62 m/s^2 is the acceleration due to gravity
t is the time taken
Re-arranging the equation, we can find the time the hammer takes:

 
        
                    
             
        
        
        
They would have disliked that they had to relearn how to measure.