Four containers are filled with cool water and are placed in front of a radiative heater and allowed to warm. Heat losses due to conduction through the bottom and due to natural or forced convection are negligible. Which container warms the fastest?

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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.