When one kilogram of ice at 0°C is converted to the same amount of water at 0°C by adding heat, the change in entropy is ________ (positive, negative, zero).
Fill in the blank(s) with the appropriate word(s).
positive
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Each of two long straight parallel wires separated by a distance of 16 cm carries a current of 20 A in the same direction. What is the magnitude of the resulting magnetic field at a point that is 10 cm from each wire?
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