Answer: Foam is a good insulator for two reasons. First, it is filled with gas bubbles; gases conduct heat less effectively than either liquids or solids, and trapping the gas in small bubbles prevents the gas from effectively transferring heat via convection.
Explanation:
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Answer:
All wind is caused by the uneven heating of Earth's surface, which sets convection currents in motion. Convection currents on a large scale cause global winds; convection currents on a small scale cause local winds.
Explanation:
Answer:
The object is sitting
Explanation:
Therefore the object cannot be in current motion as no force has been acted upon it (exept gravitational force)
B. Three-phase circuit
C. 480-volt circuit
D. Communication circuit
The communication or data circuit is becoming increasingly popular in residential electrical design and construction, thanks to the rise of smart homes and home automation systems.
In the realm of residential electrical design and construction, the type of circuit becoming increasingly popular is the D. Communication circuit. This type of circuit, also known as a data circuit, is being more commonly used thanks to the surge in use of smart homes and home automation systems. These systems require a complex network of communication circuits to function, hence their amplified use in recent years.
Contrarily, A. Hazardous-area circuits, B. Three-phase circuits, and C. 480-volt circuits are not typically found in residential properties. They are usually used in commercial or industrial settings where the electrical demand is significantly higher.
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Communication circuit (D) is becoming more common in residential electrical design and construction.
LAN Ethernet cables, outlets, and even hubs and bridges, are being built into the walls of new homes, along with the usual electrical outlet wiring, to give the owner the networking infrastructure and internet access that everybody needs now ... without stringing a mess of cables on the floor and through doors all over the house.