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?

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

Which of the following is a direct benefit of the use of assembly lines in production a. laws against theft fraud and coercion are needed to protect free choice. b. the government needs to plan efficient outcomes. c. competition among producers by itself cannot ensure a wide range of consumer choices. d. works pressure the government to guarantee minimum wages