25. Energy and fields - closest approach

Closest Approach 1
A. (Q)/(4*pi*epsilon_0*((U)/(q)))
B. (Q)/(4*pi*epsilon_0*((m*v**(2))/(2*q)))
C. (Q)/(4*pi*epsilon_0*((3*k_B*T)/(2*q)))

Closest Approach 2
A. 2.0E-12 m

Closest Approach 3
A. 8.0E-12 m

Closest Approach 4
A. 9E-12 J

Closest Approach 5
A. 6.1E-15 m
B. 2.5E-12 J
C. 2.0E-12 J
D. 2.3E-12 m 

Closest Approach 6
A. 4.8E-12 m 
B. 1.2E-12 m 
C. 3.9E7 ms^-1
D. 5.6E7 ms^-1

Closest Approach 7
A. 2.5E-9 m

Closest Approach 8
A. 4.3E-15 m