Answer:
they will move away from each other
 
        
             
        
        
        
Answer:
Diamagnetic
Explanation:
Hunds rule states that electrons occupy each orbital singly first before pairing takes place in degenerate orbitals. This implies that the most stable arrangement of electrons in an orbital is one in which there is the greatest number of parallel spins(unpaired electrons).
For vanadium V ion, there are 18 electrons which will be arranged as follows; 
1s2 2s2 2p6 3s2 3p6.
All the electrons present are spin paired hence the ion is expected to be diamagnetic.
 
        
             
        
        
        
2.5 better than the first one more game to go hard but I 46 the bucks 
 
        
                    
             
        
        
        
Answer:
The current of the solenoid is 0.0129 A.
Explanation:
The movement of the electron within the solenoid in a circle is produced by equaling the magnetic force and the centripetal force, as follows: 
 
 


Where:
I: is the current
m: is the electron's mass = 9.1x10⁺³¹ kg
v: is the electron's speed = 3.0x10⁵ m/s
μ₀: is the permeability magnetic = 4πx10⁻⁷ T.m/A
n: is the number of turns per unit length = 35/cm
r: is the radius of the circle = 3.0 cm
e: is the electron's charge = 1.6x10⁻¹⁹ C  
 
  
Therefore, the current of the solenoid is 0.0129 A.
I hope it helps you!
 
        
             
        
        
        
Answer:
f = 19,877 cm   and  P = 5D
Explanation:
This is a lens focal length exercise, which must be solved with the optical constructor equation
         1 / f = 1 / p + 1 / q
where f is the focal length, p is the distance to the object and q is the distance to the image.
In this case the object is placed p = 25 cm from the eye, to be able to see it clearly the image must be at q = 97 cm from the eye
let's calculate
         1 / f = 1/97 + 1/25
         1 / f = 0.05
         f = 19,877 cm
the power of a lens is defined by the inverse of the focal length in meters
          P = 1 / f
          P = 1 / 19,877 10-2
          P = 5D