Cuando se introducen 50 g de metal a 75 °C a 100 g de agua a 15 °C, la temperatura del agua asciende a 18.3 °C. Calcule el calor específico del metal considerando que no hay pérdida de calor
hacia los alrededores.

catya your not at all which answer i've seen you do this on another question!

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )