Neco 2020 Biology Question 29
Practice objective / multiple choice question 29 from the 2020 Neco Biology examination.
An adult at rest produces metabolic heat at a rate of 100 W. The skin temperature is 33 °C and the ambient temperature is 25 °C. The body surface area is 1.0 m², skin emissivity is 0.95, and the Stefan‑Boltzmann constant is \(5.67\times10^{-8}\) W m⁻² K⁻⁴. Heat is lost by radiation and by convection (convection coefficient = 5 W m⁻² K⁻¹). Assuming steady‑state thermal balance, determine the rate of evaporative water loss (in grams per hour) required to dissipate the remaining heat. (Latent heat of vaporisation of water = 2.43 kJ g⁻¹.)
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About This Question
This is Neco 2020 Biology Question 29. It is one of the objective questions from the 2020 Neco Biology examination.
Difficulty level: Medium .
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