hertz: A unit for measuring frequency, equal to one cycle per second. If a sound wave has a frequency of 20,000 Hz,
Answer:
<h3>The 28 loops wound on the square armature</h3>
Explanation:
Peak output voltage
V
Area of square armature 
Magnetic field
T
Angular frequency 
According to the law of electromagnetic induction,

Where
number of loops of wire.

≅ 28
Thus, 28 loops of wire should be wound on the square armature.
It is the smallest planet with a bluish color that can probably make it look like a comet
Due to the moon's gravitational force and inertias counterbalance.