A liquid-to-liquid heat exchanger uses a heat-transfer fluid that circulates through the solar collector, absorbs heat, and then flows through a heat exchanger to transfer its heat to water in a storage tank. Heat-transfer fluids, such as antifreeze, protect the solar collector from freezing in cold weather.
Networking, also known as computer networking, is the practice of transporting and exchanging data between nodes over a shared medium in an information system.
Answer:
is shows that the cashier has a good habit and has a good sense of hygiene