The relative humidity on a starry summer night is determined as 91%.
The dry bulb depression temperature is calculated as follows;
ΔT = 19⁰C - 18⁰C = 1⁰C
at dry bulb temperature of 18⁰C and depression temperature of 1⁰C, the relative humidity is determined as 91%.
Thus, the relative humidity on a starry summer night is determined as 91%.
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