A physics-based technology is one that uses mechanics, heat, electricity, magnetism, heat transfer, light, sound, optics, etc. Even if chemistry and, in certain cases, biology provided the knowledge necessary to discover fertilizers, drugs, polymers, and chemicals, physics-based technology still prevails in their manufacture. Even though it has numerous benefits, students still complain about how tough it is. Below is a sample of a question.
The magnetic field 10 cm from a wire carrying a 1 A current is 2 μT. What is the field 4 cm from the wire? Express your answer with the appropriate units.
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