Copper because it contains alot of electricity
        
             
        
        
        
D. They are heterotrophs that digest food internally.
        
             
        
        
        
Answer:
Explanation:
q = 2e = 3.2 x 10^-19 C 
mass, m = 6.68 x 10^-27 kg 
Kinetic energy, K = 22 MeV 
Current, i = 0.27 micro Ampere = 0.27 x 10^-6 A 
(a) time, t = 2.8 s 
Let N be the alpha particles strike the surface. 
N x 2e = q 
N x 3.2 x 10^-19 = i t 
N x 3.2 x 10^-19 = 0.27 x 10^-6 x 2.8 
N = 2.36 x 10^12 
(b) Length, L = 16 cm = 0.16 m 
Let N be the alpha particles 
K = 0.5 x mv²
22 x 1.6 x 10^-13 = 0.5 x 6.68 x 10^-27 x v²
v² = 1.054 x 10^15 
v = 3.25 x 10^7 m/s 
So, N x 2e = i x t 
N x 2e = i x L / v 
N x 3.2 x 10^-19 = 2.7 x 10^-7 x 0.16 / (3.25 x 10^7)
N = 4153.85
(c) Us ethe conservation of energy 
Kinetic energy = Potential energy 
K = q x V 
22 x 1.6 x 10^-13 = 2 x 1.5 x 10^-19 x V 
V = 1.17 x 10^7 V
 
        
             
        
        
        
Charge is actually either excessive number or electrons or shortage of them.
as you can't destroy the electron or create it - you can't destroy or create charge 
        
             
        
        
        
the awnser to ur question is D