A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other ( Fig. E17.62 ). The rod consists of a 1.00-m section of copper (one end in boiling water) joined end to end to a length L 2 of steel (one end in the ice-water mixture). Both sections of the rod have cross-sectional areas of 4.00 cm 2 . The temperature of the copper-steel junction is 65.0°C after a steady state has been set up. (a) How much heat per second flows from the boiling water to the ice-water mixture? (b) What is the length L 2 of the steel section? Figure E17.62
A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other ( Fig. E17.62 ). The rod consists of a 1.00-m section of copper (one end in boiling water) joined end to end to a length L 2 of steel (one end in the ice-water mixture). Both sections of the rod have cross-sectional areas of 4.00 cm 2 . The temperature of the copper-steel junction is 65.0°C after a steady state has been set up. (a) How much heat per second flows from the boiling water to the ice-water mixture? (b) What is the length L 2 of the steel section? Figure E17.62
A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other (Fig. E17.62). The rod consists of a 1.00-m section of copper (one end in boiling water) joined end to end to a length L2 of steel (one end in the ice-water mixture). Both sections of the rod have cross-sectional areas of 4.00 cm2. The temperature of the copper-steel junction is 65.0°C after a steady state has been set up. (a) How much heat per second flows from the boiling water to the ice-water mixture? (b) What is the length L2 of the steel section?
A long rod, insulated to prevent heat loss along its sides, is in perfect thermal contact with
boiling water (at atmospheric pressure) at one end and with an ice-water mixture at the other
(Fig. E17.62). The rod consists of a 1.00-m section of copper (one end in boiling water) joined
end to end to a length L2 of steel (one end in the ice-water mixture). Both sections of the rod
have cross-sectional areas of 4.00 cm?. The temperature of the copper-steel junction is 65.0 °C
after a steady state has been set up. (a) How much heat per second flows from the boiling water
to the ice- water mixture? (b) What is the length L2 of the steel section?
Figure E17.62
Insulation 65.0°C
O Boiling
Water
Ice and
COPPER
STEEL
water
-1.00 m
Thank u!
A copper rod has one end in ice at a temperature of O°C, the other in boiling water. The length and diameter of the rod are 1.80 m and
3.90 cm, respectively. At what rate in grams per hour does the ice melt? Assume no heat flows out the sides of the rod. Thermal
conductivity of copper is 401 W/(m-K). Latent heat of fusion for water, Lf= 333.7 J/g. Water boils at 100°C
While swimming, conduction can play a big role in heat loss from the body. The body
of one swimmer has a total surface area of 1.80 m2 and an average thickness of 1.60
mm. The skin's thermal conductivity is 0.370 W/m-K. If the water's temperature is
20.0°C, and the blood reaching the inner surface of the skin is at 37.0°C, what is the
rate of energy loss for that person through conduction?
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