En qué órganos y sistemas corporales se producen modificaciones con el ejercicio físico

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.