Calculate the energy transferred when a block of gold at 80.0°C is placed in a 2.00 liter (2kg) of
water at 25.0°C if the final temperature becomes 45.0°C. Specific heat of water is 4184 J/kg*C.
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Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk