To Explain:Water in a canteen covered with wet canvas stays cool.
Explanation of Solution
Introduction:
Evaporation is the process in which a liquid changes state to gaseous form below its boiling point.
For evaporation, liquid requires thermal energy. When the canteen is covered with a wet canvas, it absorbs part of the energy from the stored water. The water in the wet canvas evaporates, hence keeping the water cooler. This will occur when the air is dry as evaporation takes place when the air can hold moisture.
Conclusion:
The water in the canvas evaporates by absorbing energy from the stored water thereby cooling it in the process.
Chapter 12 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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