Answer :
Final answer:
To convert electric energy into sound energy, Brian should use a speaker in the alarm clock.
Explanation:
To convert electric energy into sound energy in an alarm clock, Brian should use a speaker. A speaker consists of a magnet and a coil of wire, which are connected to the clock's circuitry. When an electric current passes through the coil, it creates a magnetic field that interacts with the magnet, causing the cone of the speaker to vibrate and produce sound waves.
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