Question
it takes 6 hours for ice layer thickness to grow from 1cm to 2cm on a lake in Siberia, ideally the time taken for thickness to grow from 3cm to 4cm?
ans 14 hrs
Joshi sir comment
for this type of question relation between time and thickness will be
[x2] α t
so 22 - 12 = k6
and 42 - 32 = kt
on dividing we will get 3/7 = 6/t
or t = 14
Read 1 Solution.
time for lake ice to grow from thickness x to y is t = L .*d*(y+x)(y-x)/2*k*T [Tsurface temperature]
L=80 cal d=1000 kg/m3
MAHADEVAN 11 year ago
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