20 grams of ice initially at -15◦C is placed on top of 100 grams of 350◦C solid gold in a thermally insulating container. a) Does all of the ice melt by they time thermal equilibrium is established? If not, how many grams of the ice melt?
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20 grams of ice initially at -15◦C is placed on top of 100 grams of 350◦C solid gold in a thermally insulating container.
a) Does all of the ice melt by they time thermal equilibrium is established? If not, how many grams of the ice melt?
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- Following vigorous exercise, the internal body temperature of a 69.5-kg person is 40.0°C. At what rate, in watts, must the person transfer thermal energy to reduce the body temp. 37.0 C in 30.0 min, assuming the body continues to produce energy at the rate of 150W?Question 4If a copper kettle has a base of thickness 2 mm and area 3 x 10^-2 m², estimate the steady difference in temperature between inner and outer surfaces of the base which must be maintained to enable enough heat to pass through so that the temperature of 1 kg of water rises at the rate of 0.25 K s^-1. Assume that there are no heat losses, the thermal conductivity of copper = 380 Wm^-1K^-1. and the specific heat capacity of water is 4200 Jkg^-1 K^-1.temperature is 330 K. Find the heat loss per unit area and the temperature of the junction of the fire brick and insulating brick? RO 5. In Sohar Petroleum Company, a steam pipeline, with 150 mm ID and 160 mm OD carries steam. The pipeline is surrounded with a layer of heat insulating material (K=0.08 W/m.k) of thickness 100 mm. The temperature drops from 392.8 K to 313 K across the insulating surface. Determine the rate of heat loss per 1 m length of pipe line. ID = 1Somm 160 mm OD,h-loo mm .K=0.08w/m.k %3D 「-392.8 ん/ 12 = 313k = 313 K 2.
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