Question

Calculate the soil temperature, at a depth of 7 ft on the 263th of the year...

Calculate the soil temperature, at a depth of 7 ft on the 263th of the year if the average ground
surface temperature is 49.2°F. Assume that the surface temperature amplitude is 18°F, the minimum
surface temperature occurs 32 days after January 1, and the soil thermal diffusivity is 0.5 ft 2 /day. (Express
your answer to one decimal place).

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