Answer:
45.09 m/s^2
Explanation:
from the question we were given the following parameters
mass = 931.9 kg
initial velocity (V1) = 0 m/s ( since it started from rest )
final velocity (V2) = 25.7 m/s
time (t) = 0.57 s 
The average acceleration is given by:
a = ( V2 - V1 ) / t
therefore 
a = (25.7 - 0) / 0.57 = 45.09 m/s^2
 
        
             
        
        
        
25 Miles per hour? I'm not quite sure what the questions asking
 
        
             
        
        
        
Answer:
5.63
Explanation:
 Divide mass by volume, which will give you 5.63. For instance,  45 divide by 8 what is it? find out
 
        
                    
             
        
        
        
No answer is possible until we know the number that belongs after the words "... angular speed of ". 
 
        
             
        
        
        
Answer:
The transmitted intensity through all polarizers is 
Explanation:
  According to Malu's law the intensity of a polarized light having an initial intensity  is mathematically represented as
 is mathematically represented as
                
Now  considering the polarizer(The polarizing disk) the equation above becomes 
           
Where n is the number of polarizers
        Substituting   for the initial intensity 3 for the n and 20° for the angle of rotation
 for the initial intensity 3 for the n and 20° for the angle of rotation 
            
                