(5) Potential flow -1 A source of strength 1.59 ms at (1,0) and a sink of the same strength at (-1,0) are combined with a uniform flow of 25 ms in the -x direction (see Fig. 4). Determine (a) the length of the Rankine body formed by the flow and (b) the difference in pressure between a point far upstream in the uniform flow and the point (1,1). stagnation point V sink source Fig. 4 stagnation point S