Final answer:
The claim that a company can extend a private cloud by adding its own servers to a public cloud is false; extension involves private cloud upgrades, not mixing with the public cloud. Also, high-voltage power lines are not wrapped in insulating material; they use air as an insulator with connectors preventing grounding.
Step-by-step explanation:
The statement that a company can extend a private cloud by adding its own physical servers to the public cloud is false. A private cloud is a proprietary network or a data center that supplies hosted services to a limited number of people. When a company adds more resources to its cloud infrastructure, it's typically expanding its private cloud internally rather than combining these resources with public cloud servers. Extending a private cloud involves upgrading or scaling its own infrastructure, not integrating with the public cloud. Alternatively, a company might create a hybrid cloud environment by orchestrating a mix of private and public cloud services to work together, but this is different from directly adding physical private servers into the public cloud infrastructure.
Also, the statement about high-voltage wires being wrapped in an insulating material is also false. The high-voltage wires you see connected to tall metal-frame towers are indeed held aloft by insulating connectors to prevent electricity from grounding, but they are not generally wrapped in insulating material. This is because insulating such high-voltage cables over long distances would be impractically expensive and difficult, and the air around the cables acts as a sufficient insulator.