11241 - Humidex
Solution Description : Simple math problem For calculate humidex use the given rule in question e = 6.11 * exp [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))] h = (0.5555)*(e - 10.0) humidex = temperature + h For calculate temperature e = 6.11 * exp [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))] h = (0.5555)*(e - 10.0) temperature = humidex - h For calculate dewpoint you need to some calculation this is the work of this this problem h = humidex - temperature e = h/0.5555 + 10.0 e = 6.11 * exp [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))] ----------- (i) use log both side of equation (i) then =>log(e) = log (6.11 * exp [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))]) =>log(e) = log(6.11) + log(exp [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))]) =>log(e) = log(6.11) + [5417.7530 * ((1/273.16) - (1/(dewpoint+273.16)))] ----------- (ii) from equation (ii) you can easily calculate the dewpoint Here log is a natural logarithm |
||||||||||