16 14 7 P070 (a) Suppose you start a workout on a Stairmaster, producing power a

Question

16 14 7 P070 (a) Suppose you start a workout on a Stairmaster, producing power at the same rate as c 116 stairs per minute. g your mass is 79.0 kg and your efficiency is 20.0% how long in S Vill it take for your body temperature to rise 1.45-c if all other forms of heat transfer in and out of your body are balanced? (Assume that climbing 116 stairs per minute produces a power of 685 w.) (b) Is this consistent with your experience in getting warm while exercising? Reading O Type here to 4/15/2018

Explanation / Answer

Power generated = 685 / 0.2 = 3425 watt

so, power wasted - 3425 - 685 = 2740 watt

as P = Q/t

Pt = Q

Pt = mc(delta T)

t = mc(delta T) / P

where c - specific heat and average specific heat capacity of a human body is approximately 3500 J/(kg.K) at normal conditions

t = 79*3500*1.45 / 2740

t = 146.32 seconds

Yes we do feel our body getting warm within 5-10 minutes of workout. This happens to prevent body from overheating by means of sweating

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