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Explain, why does a wise farmer water his fields, if forecast is forst? |
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Answer» The frost can seriously damage the leaves and fruit of plants. When a farmer waters his fields, during, night, this water gives large amount of heat energy, because 1g of water will liberate 4.2J of energy for every 1°C fall in temperature. Thus, the air around the field is saturated with heat energy and its temperature does not fall below 0°C. Thus, no frost is formed. |
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