Answer:
Technically everything has somewhat of a magnetic field. I guess
 
        
             
        
        
        
work is distance * force so 15*100=1500
and to find time you know power = diastance * force / time
so 25=15*100/t
25=1500/t
25/1500=t
.016=time
 
        
             
        
        
        
Bro I really think it might be c
        
                    
             
        
        
        
A compound optical microscope or just a optical microscope is a microscope that uses light and has more than one lens.
        
                    
             
        
        
        
 Answer:
110.4 v 
Explanation:
Find the equivalent resistance of the two parallel circuits 
R1 and R2 in parallel   =   R1 * R2 / (R1+ R2) =   <u>1 ohm </u>
  similarly R4 and R5 =  <u>4.77 ohms</u>
Now you can add the three resistances into one  (R3=10) 
     1 ohm + 10 ohm + 4.77 ohm = 15.77 ohms
Now 
V = IR 
V =  7 amps  * 15.77 ohm = 110.4 v