What can cause attention deficit hyperactivity disorder (ADHD)? A. low levels of gamma-amino butyric acid B. low levels of serot
2 answers:
This probably isn’t the answer you are looking for, but your homework question is heavily outdated. New studies show that ADHD is not caused by a chemical imbalance but rather issues with dopamine transporters () which is a protein in the body. However, the answer I believe to be most fitting for your homework would be a serotonin deficiency.
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⁻Answer:
Ne=1.8 *10^37
Explanation:
Current density J=Iₐ /(πr²)
= 8/(π* (1.5*10⁻³/2)²)= 4.53*10⁶ A/m²
Drift velocity = J/ne =4.53*10⁶ /(8.5×1028 *1.6×10−19 ) = 3.33 ×10−4 m/s
volume = πr²h= π * (1.5*10⁻³/2)² * 3 = 5.3 ×10−6 m³
Ne=1.8 *10^37