Answer:
Selenium is a semiconductor 
Explanation:
Selenium is a semiconductor. 
Elements in the column IV and VI of the periodic table are referred to as Semiconductor. 
Selenium lies in the column VI along with Tellurium
Some other elements of the column IV are silicon, germanium, and tin 
 
        
                    
             
        
        
        
Answer: The copper wiring most likely caused the mini-refrigerator fire.
Explanation: A mini-refrigerator may have one or more evaporator fan motors. These motors have copper wiring. In some situation these copper wires gets overheated. It may result to the firing of the mini-refrigerator.
Therefore, the mini-refrigerator fire was most likely caused by copper wiring.
 
        
             
        
        
        
Newton's 2nd law of motion:  
                             Force = (mass) x (acceleration)
Divide each side by (mass):      
                             Acceleration = (force) / (mass)
                                               =  (100 N) / (50 kg)
                                               =  2 m/s²   
        
             
        
        
        
1 mile. Is this a joke lol