The graph between the strength of the magnet(number of paper clips picked) and battery is approximately a straight line. 
For 25 coil, with increase of 1.5 V battery voltage, the electromagnet picks about 5 more clips. So, for a 7.5 V battery, it would pick about 30 paper clips.
For 50 coil, with increase of 1.5 V battery voltage, the electromagnet picks about 15 more clips. So, for a 7.5 V battery, it would pick about 30 paper clips. 
 
        
             
        
        
        
My Physics teacher keeps giving us way too much work to do at home.
        
                    
             
        
        
        
A. is a neutral substance a pH of 7 describes something of neutral pH where anything less than 7 is an acid and higher is a base 
 
        
                    
             
        
        
        
Answer:
Hope it helped
stay safe, mark BRAINLIEST