Answer: 3.28 mins
Explanation:
Here’s how it breaks down:
Conversions
74 mph = 33.08 m/s
6.5 km = 6500 m
(6500 m)/(33.08 m/s) = 196.5 seconds
196.5 seconds is equivalent to 3.28 minutes
The temperature difference after 3 hours is 5.16 K. Given that the moles of O₂ inhaled rate at 0.02 mole/min, which converts to 1.2 mole/hour, we know the average heat released during metabolism is 7.2 kJ/h·kg. Therefore, the amount of heat generated within 3 hours will be 7.2 kJ/h·kg multiplied by 3 hours, giving a result of 21.6 kJ/kg, or 21.6 x 10³ J/kg. Applying the formula Qp = Cp x ΔT, and taking the body's heat capacity to be 4.18 J/g·K, we find ΔT = 5.16 K.