Idk its really weird because the ridges are making the quarter stand and therefore able to roll
        
             
        
        
        
Answer:
The lethal voltage for the electrician under those conditions is 126.5 V.
Explanation:
To discover what is the lethal voltage to the electrician we need to find out what is the voltage that produces 55 mA = 0.055 A when across a resistance of 2300 Ohms (Electrician's body resistancy). For that we'll use Ohm's Law wich is expressed by the following equation:
V = i*R
Where V is the voltage we want to find out, i is the current wich is lethal to the electrician and R is his body resistance. By applying the given values we have:
V = 0.055*2300 = 126.5 V.
The lethal voltage for the electrician under those conditions is 126.5 V.
 
        
                    
             
        
        
        
Answer:
 500km
Explanation:
Given parameters: 
Speed  = 200km/hr
Time taken  = 2.5hrs
Unknown: 
Distance  = ? 
Solution:
To solve this problem, we use the speed, time and distance equation. 
    Therefore;
   Distance  = Speed x time 
So; 
   Distance  = 200 x 2.5  = 500km
 
        
             
        
        
        
 Physical changes: melting, evaporating, and condensation. This is a physical change.