A Runner Generates 1260 W of Thermal Energy

question 91

Multiple Choice

A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how much water does this runner lose in 15 minutes of running? The latent heat of vaporization of water is 22.6 × 10⁵ J/kg.

• A) 50 g
• B) 500 g
• C) 35 g
• D) 350 g
• E) 40 g

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Definitions:

Hypersomnia

Hypersomnia is characterized by excessive sleepiness, where an individual has trouble staying awake during the day, even after long periods of sleep.

NREM

Refers to the stages of sleep that are not accompanied by rapid eye movements, important for physical restoration and memory consolidation.

Delta Waves

These are slow brain waves that are most prominent during deep sleep, indicating a stage of deep rest and regeneration.

Alpha Waves

Brain waves detected by EEG that represent a state of relaxation with eyes closed, typically associated with calm wakefulness.