three identical charges q form an equilateral triangle of side a, with two charges on the x-axis and one on the positive y-axis (a) find an expression for the electric field at points on the y-axis above the uppermost charge. (b) show that your result reduces to the field of a point charge 3q for y> > a. 2y [answers: ka j (b) show that 2 3a 4

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.