A long hollow cylindrical conductor (inner radius = 2.0 mm, outer radius = 4.0 mm) carries a current of 24 A distributed uniformly across its cross section. A long wire which is coaxial with the cylinder carries an equal current in the opposite direction. What is the magnitude of the magnetic field 3.0 mm from the axis?
a. 0.82 mT
b. 0.93 mT
c. 0.70 mT
d. 0.58 mT
e. 0.40 mT
b
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A 1.6-kg block is attached to the end of a 2.0-m string to form a pendulum. The pendulum is released from rest when the string is horizontal. At the lowest point of its swing when it is moving horizontally, the block is hit by a 10-g bullet moving horizontally in the opposite direction. The bullet remains in the block and causes the block to come to rest at the low point of its swing. What was
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a. nuclear fission b. nuclear fusion c. neutron activation d. nuclear emission e. binding energy
We describe a location on Earth's surface by stating its
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