Please help me with this question :( I have a test soon and I want to be prepared..
Detailed solutions please!
(I’ll give you 25points)

Explanation:

Sum of the vertical forces is zero

F₁ + F₂ - Z = 0

Z is negative since Z acts in the opposite direction from F₁ and F₂

30 + 20 - Z = 0

Z = 50

answer; /// the above statement is (true);

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."