Inertia depends on the mass of an object. 
        
                    
             
        
        
        
Polar will always have the higher boiling point because they have strong van der waal forces
        
             
        
        
        
To calculate for the final temperature, we need to remember that the heat rejected should be equal to the absorbed by the other system. We calculate as follows:
Q1 = Q2
(mCΔT)1 = (mCΔT)2
We can cancel m assuming the two systems are equal in mass. Also, we cancel C since they are the same system. This leaves us,
 (ΔT)1 = (ΔT)2
(T - 80) = (0 - T)
T = 40°C
        
             
        
        
        
Sound is made when air molecules. Vibrate and move in a wave pattern, so sound moves in waves of compressions and refractions (expansion).
Hope this helps! :)