How can a shape of an object affect how much heat is transfered to its surrounding?

Answer 1

Yes.

All the matter within an object is constantly emitting infra-red radiation (depending on the material and how hot it is, it may also emit other types of radiation). But the radiation emitted by matter in the middle of the object will be absorbed by other atoms within the material and so won't escape. This allows the shape and surface area to have an effect on how much radiation escapes.

Though it can be argued that the same amount of radiation is "emitted" regardless of the shape, but the shape determines how much actually gets away and how much is re-captured by other particles within itself.

Answer 2

Temperature is some how equivalent to potential difference in case of water levels in a U tube. So as there is level difference water flows from higher level to lower level.

And also equivalent to pressure difference in case of air packed in a container. Here air comes out to the region of low pressure

Even could be equivalent to electrical potential difference in case of electric field. In this case charges flow from higher to lower potential and that is named as current flow.

If temperature of the body is the same as that of surroundings, then no radiation exists.

But Prevost differs from this idea as that radiation still exists but same amount of radiation the body receives from the surroundings.

Any way according to Newton's law of cooling, the rate of loss of heat in the form of radiation is directly proportional to the mean excess of temperature over that of surroundings.

Answer 3

Mainly, the shape affects the object's surface area. In general, the more surface area, the faster heat will be transfered.

Answer 4

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