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Q8: A compass needle in a magnetic field<br>A)experiences
Q23: For radio transmission, which has the higher
Q23: The dark lines in the Sun's spectrum
Q26: The most disorderly arrangement of energy within
Q31: Light will pass through a pair of
Q34: Compared to a sound of 30 decibels,
Q37: What is the frequency of an electromagnetic
Q37: Which light source is more energy-efficient?<br>A)a fluorescent
Q59: Two charged particles repel each other with
Q68: A device that transforms mechanical energy into