How does the electric potential energy between two positively charged particles change if the distance between them is tripled? a. it is reduced by a factor of 9.

b. it is increased by a factor of 9.

c. it is increased by a factor of 3.

d. it is reduced by a factor of 3.

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel