Answers

2016-03-27T11:29:58+05:30
When spirit is kept in petri dish under fan the wind speed is more
Evaporation is directly proportional to wind speed thus  spirit in prtri dish quickly evaporates under fan when compared to that kept in close room
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2016-03-27T11:48:49+05:30
As we know that wind speed influences evaporation,

As wind speed increases, rate of evaporation false increases.

When we keep the dish under fan, the wind speed is more, hence the evaporation is faster ^-^.
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