Question
Do you feel cooler at 100$\%$ humidity at $30^{\circ} \mathrm{C},$ or at 50$\%$ humidity at $30^{\circ} \mathrm{C} ?$ Explain your thinking.
Step 1
When we sweat, the sweat on our skin evaporates into the air. This is an endothermic process, meaning it absorbs heat from our bodies, making us feel cooler. Show more…
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Key Concepts
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Compare the weather in two places where it is cloudy and breezy. At beach $\mathrm{A}$ it is $20^{\circ} \mathrm{C}, 103.5$ $\mathrm{kPa}$, relative humidity $90 \%$; at beach $\mathrm{B}$ it is $25^{\circ} \mathrm{C}$ $99 \mathrm{kPa}$, relative humidity $40 \%$. Suppose you just took a swim and came out of the water. Where would you feel more comfortable and why?
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