Explanation:
The given data is as follows.
             
         
         Electric potential energy ( ) = ?
) = ?
Formula to calculate electric potential energy is as follows.
              
 
                         = 
                         = 
Thus, we can conclude that the electric potential energy of the pair of charges when the second charge is at point b is  .
.
 
        
             
        
        
        
The sediment size that would allow water to flow through at the fastest rate are pebbles. Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is consequently transported by the action of wind, or ice, and or by the force of gravity acting on the particles. Pebble is a clast of rock with a particle size of 2 to 64 millimeters based on the scale of sedimentology. 
        
             
        
        
        
Answer:
The mass of water is 
Explanation:
Given that,
Area of town = 29 km²
Time = 30 min
Height = 2.4 inch
Mass = 103 kg
We know that,
1 m = 39.37 inch
So, 

We need to calculate the volume
Using formula of volume

Put the value into the formula


We need to calculate the mass of water
Using formula of density

Put the value into the formula



Hence, The mass of water is 
 
        
             
        
        
        
Health and safety are two reasons