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how do the principles of convection, conduction, and radiation explain how the water in the saucepan gets hot?

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then helps to distribute the heat over the saucepan and to give heat to the water. the convection of the water helps distributing the heat within the water, till all the water is boiling

The stove gets hot and through conduction, the surface of the saucepan also becomes hot, because it is in direct contact with the stove surface.
The water in the saucepan then becomes hot through convection because the hotter fluid rises and the colder, denser water sinks and becomes hot as well.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.

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