Question: An iron bar 2 c m 4 c m 1 0 c m at a temperature of 1 0 0 C is dropped into a

An iron bar

2 c m 4 c m 10 c m

at a temperature of

100 C

is dropped into a barrel of water at

25 C .

The barrel is large enough that the water temperature rises negligibly as the bar cools. The rate at which heat is transferred from the bar to the water is given by

Q (\frac{J}{m} i n) = U A (T_{b} - T w)

where

An iron bar 2cm4cm10cm at a temperature of 100C is dropped

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