The temperature drops from 0^circ C to -10^circ C If one person's body loses 200W/m^2 of heat, how much total heat is lost in 2 hours? (Hint: Energy=Powertimes Time)

Here's how to calculate the total heat loss:<br /><br />1. **Convert time to seconds:** 2 hours * 60 minutes/hour * 60 seconds/minute = 7200 seconds<br /><br />2. **Calculate total heat loss:** Energy = Power × Time = 200 W/m² * 7200 s = 1,440,000 J/m²<br /><br />Therefore, the total heat lost per square meter of body surface area is $\boxed{1,440,000 J/m^2}$ or 1.44 MJ/m². The temperature change is irrelevant to the calculation as the question provides the rate of heat loss directly.<br />