Explanation:
the other 40% is used to power the 60% making it only capable of 60% efficiency 
 
        
             
        
        
        
<span>A fence runs all the way around the house but never moves.</span>
        
                    
             
        
        
        
Answer:
The answer to your question is 
Explanation:
Data
mass = 0.5kg
T1 = 35
T2 = ?
Q = - 6.3 x 10⁴ J  = - 63000 J
Cp = 4184 J / kg°C
Formula
                         Q = mCp(T2 - T1)
                          T2 = T1 + Q/mCp    
Substitution
                        T2 = 35 - 63000/(0.5 x 4184)
                         T2 = 35 - 63000/2092
                         T2 = 35 - 30.1
                          T2 = 4.9 °C