A glass window of area 1sq.m.conducts 50x10^6J of energy into a room in 1 hour. The 2 faces of glass are at temperature 18degree C and 16degree C. Find the thickness of glass if it's thermal conductivity is 0.8W m^-1 K^-1.
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Given: ➡️a=1sqm
➡️Q=5,00,00,000 J
➡️t=1hr= 3600s
➡️k=0.8
➡️t1=18
➡️t2=16
➡️thickness=d=?
WKT, Q=KAt(t1-t2)/d
50,00,000=0.8×1×3600(18-16)/d
d=6.91×10^-4 m
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