Final answer:
The statement that a clock is connected to the hot battery bus is false. The clock would not be considered essential equipment that needs to remain powered in case of an electrical failure. High-voltage wires on towers are held aloft by insulators, though the wires themselves are not typically wrapped in insulating material.
Step-by-step explanation:
Is the Clock Connected to the Hot Battery Bus?
Regarding the question of whether the clock is one of the items connected to the hot battery bus, the statement is False. The hot battery bus in an aircraft electrical system is designed to provide power to essential equipment that must remain powered even in the event of an electrical failure.
Typically, items like emergency lights, flight data recorders, and critical navigation instruments are connected to this bus. A clock, especially in the context of non-aviation settings, would not be directly connected to a hot battery bus; it would usually be a non-essential item.
Battery and Circuit Concepts
A battery depicted in any figure, regardless of color, symbolizes an energy source with positive and negative terminals. The longer line typically represents the positive terminal, and the shorter line the negative terminal.
Referring to the wear out of a clock battery after moving 10,000 C of charge at a rate of 0.500 mA, to find out how long the clock ran, one can use the formula for current (I = Q/t), where Q is the charge in coulombs and t is the time in seconds.
The number of electrons per second that flowed can be determined by dividing the current (in amperes) by the charge of a single electron (approximately 1.602 x 10-19 coulombs per electron).
For the CHECK YOUR UNDERSTANDING 10.1 question about a battery getting hot when the terminals are shorted: this happens because the resistance in the circuit is extremely low, leading to a large current, which in turn generates heat as the electrons collide with atoms inside the wire.
Lastly, the high-voltage wires being connected to towers by insulating connectors is True, but the statement that these wires are wrapped in insulating material is False. Typically, these wires are bare and not insulated, as the air provides a natural insulation, and the height of the towers keeps them away from objects that could conduct electricity.