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ProfessorA radiator transfers heat to the air through a process called convection. As hot water flows through the radiator, it warms the metal surface of the radiator. The heat is then transferred to the air surrounding the radiator, causing it to rise and circulate throughout the room.
Cyclical radiant dissipation.
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Convection
I'll tell you all i know ;) convection is the heat transfer through atoms or molecules that move, so that's liquids or gases. It's difficult to see in gases, it just kind of, happens. If you turn a radiator is turned on and the room is full of cool air, the radiator in the middle will warm up the particles above it and as warm things rise these heated particles will rise, pushing the cool air towards the radiator to be heated too.
The hot surface of the radiator warms the air in direct contact with it. This hot air will now have lower density than the other cold air, so it will move toward the ceiling of the room and spread out, forcing more cold air to contact the radiator. This circulation and heating continues until all the air in the room is the same temperature.
The radiator is filled with hot water from another location. The water then heats up the metal that the radiator is made of, and the metal heats up the air in the room.
The most efficient location for a radiator is underneath a window. This is because the air near the window(and the air leaking in from the window) will be cold, and will therefore drop down to the floor because cold air is heavier than warm air. On its way towards the floor the cold air will pass near the radiator where it will be warmed up, and afterwards rise towards the ceiling of the room. When the air eventually cools down it will drop to the floor, where it eventually will be heated again by the radiator. The air will continue to rotate in this manner.
In older buildings the radiator was placed near the center of the apartment, as this was where fireplaces were previously situated. However this proved ineffective as the cold air seeping in from the windows would have to cross the floor to reach the radiator and be heated, resulting in a very cold floor.
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Why would a radiator transfer heat quicker to a metal spoon in contact than to the air surrounding?
The metal spoon has a higher thermal conductivity than air, which allows heat to transfer faster from the radiator to the spoon. Air is a poor conductor of heat compared to metal, so the heat transfer is more efficient when the radiator is in direct contact with the metal spoon.
What heat transfer is warming hand over a radiator?
The heat transfer that warms your hand over a radiator is primarily convection. As the air surrounding the radiator is heated, it rises, carrying heat to other surfaces such as your hand. Additionally, some heat transfer may also occur through radiation, as the hot radiator emits infrared radiation that can be absorbed by your hand.
How does heat from a radiator transfer?
Heat from a radiator transfers through a process called convection. As the hot water or steam inside the radiator warms the metal panel, the heat is then transferred to the surrounding air. This warm air rises, creating a convection current that helps distribute heat throughout the room.
Which example of heat transfer is due mainly to convention?
Heating a room with a radiator is an example of heat transfer mainly through convection. As the air surrounding the radiator is heated, it becomes less dense and rises, creating a convection current that circulates warm air around the room.
Explain how you could feel heat from a radiator by more than one method of transfer?
You can feel heat from a radiator through conduction, where direct contact with the hot radiator causes heat to transfer from the radiator to your body. You can also feel heat through convection, where the hot air near the radiator rises, creating a current that carries heat to you.
