Answer:
Part 1 
Part 2 
Part 3 
Explanation:
Given 
Number of protons 
Radius of nucleus 
Distance of the electrons 
Part 1
 Electric field produced by  just outside its surface

Part 2
 Electric field produced by  just outside its surface

Part 3
The net electric field inside a uniform shell of negative charge is zero because the electric flux lines cancel out each other
hence, the solution is 
Part 1 
Part 2 
Part 3 
 
        
             
        
        
        
Answer:
The mechanical energy is converted to potential energy while the kinetic energy is zero
Explanation:
mechanical energy is the sum of potential energy and kinetic energy. It is the energy associated with the motion and position of an object. The total mechanical energy is the sum of these two forms of energy.
The Law of Conservation of Energy: Energy cannot be created or destroyed, but is merely changed from one form into another. This means that potential energy can become kinetic energy, or vice versa, but energy cannot “disappear”.
The mechanical energy is converted to potential energy while the kinetic energy is zero
 
        
             
        
        
        
Answer:
It is impossible to detect underground water from the surface. Dowsing practitioners refuse to explain their secrets. 
Explanation:
 
        
             
        
        
        
Answer:
 in the direction of motion of Jacob
 in the direction of motion of Jacob
Explanation:
Given:
mass  of Jacob, 
velocity of Jacob, 
mass of Ethan, 
velocity of Ethan, 
Now using the conservation of linear momentum for the case:
(When the two masses in motion combine to form one after the collision then they will move together in the direction of the greater momentum.)


 in the direction of motion of Jacob as it was assumed to be positive.
 in the direction of motion of Jacob as it was assumed to be positive.