Lots of surface area - its designed that way.
Yes to both--they gain heat from the source, and lose heat to the atmosphere. They have to be able to do both; if the radiator in your car couldn't absorb heat from the coolant, it wouldn't cool the engine properly.
the material can gain or lose heat easily
Lynx
A radiator is a conductor because it is made of metal, which is a material that allows heat to flow through it easily. When hot water or steam passes through the radiator, the metal quickly heats up and transfers that heat to the surrounding air, helping to warm up a room.
A radiator gives off heat not prevents it.
A good conductor of heat will transfer heat quickly because it allows heat to flow easily from one point to another. This means that when heat is applied, the conductor will quickly distribute it across its surface, allowing it to lose heat faster compared to a poor conductor.
a radiator that provides heat and cooling
As coolant cycles through the engine, it absorbs heat from the engine, after which, it continues through the cooling system back to the radiator. As the coolant passes through the radiator, the heat is exchanged to the ambient air by way of airflow through the radiator fins (this is why it's important not to bend the radiator fins).
The most heat is typically lost through windows, doors, walls, and the roof of a home. These areas are less insulated and can allow heat to escape more easily.
Radiator is a device to cool the heat engin using water as a coolent
heat
Most radiator hoses burst due to old age or rubbing against an engine part once it bursts you will lose antifreeze rapidly due to the pressure causing your car to over heat.