Olympic medals have a diameter of 60mm and a thickness of 3mm. Gold has a density of 19g/cm3 work out the volume of the gold medal and the mass of the gold medal

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."

option number c is the right answer.