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Bats are capable of navigating using the earth's field-a plus for an animal that may fly great distances from its roost at night. If, while sleeping during the day, bats are exposed to a field of a similar magnitude but different direction than the earth's field, they are more likely to lose their way during their next lengthy night flight. Suppose you are a researcher doing such an experiment in a location where the earth's field is 50 ?T at a 60 ? angle below horizontal. You make a 80cm diameter, 50-turn coil around a roosting box; the sleeping bats are at the center of the coil. You wish to pass a current through the coil to produce a field that, when combined with the earth's field, creates a net field with the same strength and dip angle (60 ? below horizontal) as the earth's field but with a horizontal component that points south rather than north.
Part A What is the proper orientation of the coil?
A) Axis of the coil is horizontal and directed south-north.
B) Axis of the coil is horizontal and directed east-west.
C) Axis of the coil is 60? below horizontal and directed south north.
D) Axis of the coil is 30? above horizontal and directed south north.
Part B What is the necessary current?
what is the sign of the charge on the electroscope that you charged by induction, What evidence do you have to support your answer
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A manager of a restaurant pushes horizontally with a force of magnitude 150 N on a box of melons. The box moves across the floor with a constant acceleration in the same direction as the applied force.
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