- (D) Consider the blast area as a set of concentric rings; one is shown in the figure. The area of
this ring, which represents the region x meters from the center of the blast, may be
approximated by the area of the rectangle shown. Since the number of particles in the ring is
the area times the density, ΔP = 2πx · Δx · N(x). To find the total number of fragments
within 20 m of the point of the explosion, integrate:
dmanu
(dmanu)
#1