An energy crisis<span> is any significant (bottleneck; logistics; or price rise) in the supply of energy resources to an economy. In popular literature, it often refers to one of the energy sources used at a certain time and place, in particular those that supply national electricity grids or those used as fuel in vehicles.</span>
        
             
        
        
        
C.Perform push ups and curl-ups daily
        
                    
             
        
        
        
The tension in the string corresponds to the gravitational attraction between the Sun and any planet.
 
        
                    
             
        
        
        
No 
It means the resultant electrical charges had canceled each other out so there is no field to be sensed .