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2014-04-10T05:00:09+07:00
77 f = 25c = 20 r = 298 k. 333 k = 60 c = 48 r = 140 f
2014-04-10T08:26:47+07:00
77f......c 5/9×(77-31)=25 25c....r 4/5×25=20 20r.....k 25°c c....k 25+273=298K 333K=…°c 333-273=60 60°c=…°r 5/4×60=48