Concept explainers
In warm regions where tropical plants grow but the temperature may drop below freezing a few times in the winter the destruction of sensitive plants due to freezing can be reduced by watering them in the evening. Explain.
How destruction of sensitive plants can be reduced by watering them a few times in the winter.
Answer to Problem 4Q
Solution:
Water insulates the plant.
Explanation of Solution
In winters, when temperature may drop below freezing point few times in tropical region, the sensitive plants can be saved from being destructed by watering them in the evening. The water insulates the plant. As water coats the plant, it will cool first instead of plant as it is in contact with cool air. The water has relatively large heat of fusion. So, when the water cools, it releases energy and the temperature of surrounding rises including that of plant. Hence, by this method destruction of sensitive plants can be reduced.
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