Thermos flasks keep hot liquids hot and cold liquids cold for long hours. It consists of a glass vessel with double walls. The glass vessel is enclosed by a metal or plastic cover for protection against damage. The space between the walls is vacuum which reduces the heat loss due to conduction and convection.
A thermo flask, also known as a thermos or vacuum flask, is a type of insulated container designed to keep the temperature of its contents relatively constant. It is commonly used to keep beverages hot or cold for an extended period, making it convenient for people who want to enjoy their drinks at the desired temperature even when they are away from a heat source or a refrigerator.
The basic design of a thermos flask consists of two walls with a vacuum between them. The inner wall, usually made of glass or stainless steel, holds the liquid contents, while the outer wall provides additional insulation. The vacuum between the walls prevents heat transfer by conduction and convection, reducing the exchange of heat between the inside and outside of the flask.
To further enhance its insulating properties, the inner walls are often coated with a reflective material to minimize heat transfer through radiation. Additionally, the flask's opening is usually equipped with a tight-fitting stopper or cap to prevent heat exchange through evaporation.
When you fill a thermos flask with a hot beverage like coffee or tea, the vacuum insulation helps to retain the heat, keeping the liquid hot for several hours. Similarly, if you fill it with cold beverages like iced water or juice, it will keep them cold for an extended period.
Thermo flasks are popular among travelers, campers, hikers, and people who commute to work because they allow them to carry their favorite drinks without worrying about the temperature changing too quickly. They also help to reduce the use of disposable cups and bottles, making them environmentally friendly alternatives for carrying beverages on the go.
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Answer:
Thermos flasks keep hot liquids hot and cold liquids cold for long hours. It consists of a glass vessel with double walls. The glass vessel is enclosed by a metal or plastic cover for protection against damage. The space between the walls is vacuum which reduces the heat loss due to conduction and convection.
Explanation:
A thermo flask, also known as a thermos or vacuum flask, is a type of insulated container designed to keep the temperature of its contents relatively constant. It is commonly used to keep beverages hot or cold for an extended period, making it convenient for people who want to enjoy their drinks at the desired temperature even when they are away from a heat source or a refrigerator.
The basic design of a thermos flask consists of two walls with a vacuum between them. The inner wall, usually made of glass or stainless steel, holds the liquid contents, while the outer wall provides additional insulation. The vacuum between the walls prevents heat transfer by conduction and convection, reducing the exchange of heat between the inside and outside of the flask.
To further enhance its insulating properties, the inner walls are often coated with a reflective material to minimize heat transfer through radiation. Additionally, the flask's opening is usually equipped with a tight-fitting stopper or cap to prevent heat exchange through evaporation.
When you fill a thermos flask with a hot beverage like coffee or tea, the vacuum insulation helps to retain the heat, keeping the liquid hot for several hours. Similarly, if you fill it with cold beverages like iced water or juice, it will keep them cold for an extended period.
Thermo flasks are popular among travelers, campers, hikers, and people who commute to work because they allow them to carry their favorite drinks without worrying about the temperature changing too quickly. They also help to reduce the use of disposable cups and bottles, making them environmentally friendly alternatives for carrying beverages on the go.