NEET & AIIMS
34.) A black body at 327°C suspended in a black
enclosure at 27°C cools at certain rate. If
temperature of black body is lowered to t °C so
that rate of cooling becomes half of initial value
then find approximate value of t in °C.
(1) 129° C
(2) 239° C
(3) 429° C
(4) 512°C
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Answer: 239°C
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