The heart produces a weak magnetic field that can be used to diagnose certain heart problems. it is a dipole field produced by a current loop in the outer layers of the heart.
a. it is estimated that the field at the center of the heart is 90 pt. what current must circulate around an 8.0-cm-diameter loop, about the size of a human heart, to produce this field?

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.