A mass of 0.5kg is suspended from a spring of negligible mass, as shown figure 5(a) A student pulls the mass down a distance of 60mm and holds it in the position shown in figure 5(b). The tension in the spring is now 7N. A) By considering the vertical forces acting on the mass, calculate the force applied by the student to hold the mass in this position. 

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."

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

the closer the planet is to the sun, the larger the gravity