Final answer:
Whipping egg whites can expand their volume by eight times. Tripling the volume of a sound leads to nine times the energy reaching the ear. Doubling the area of a parallel-plate capacitor results in the doubling of its capacitance.
Step-by-step explanation:
When whipping egg whites, the volume can expand up to eight times its original volume. This is due to the incorporation of air into the egg whites, which creates a foam and increases the volume significantly.
If the volume on an alarm clock is tripled to awaken a sleeping child, the sound intensity does not increase linearly. Instead, the amount of energy striking the child's ear drums each second would be nine times as much because sound intensity is related to the square of the amplitude of the sound wave.
When the area of a parallel-plate capacitor doubles, the capacitance also doubles assuming that the distance between the plates remains constant. The capacitance of a parallel-plate capacitor is directly proportional to the area of the plates.