Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 19, Problem 23SP
A 2.0-cm-thick brass plate
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A copper sheet of area A is bonded to an unknown metal sheet of area A. The thickness of the unknown metal is half that of
the copper. The outside surface of the copper sheet is held at a temperature of 80°C and the unknown metal sheet at 40°C.
If the temperature of the copper-unknown metal interface is 60°C, what is the thermal conductivity of the unknown metal in
(W/mK)? (Kcu = 386 W/m.K).
Select one:
O a. 193
b. 772
c. 258
O
d. 386
O e. 220
O
A copper plate has a hole with a diameter of 2.50 cm. A copper shaft with a diameter of 2.501 cm is to be inserted into the hole. If the linear coefficient of thermal expansion for copper is 17.0 × 10−6/°C, then what decrease in temperature of the copper shaft is required for the shaft to just fit inside the hole
A plane wall has a thickness of 55 cm and is made of a material with a thermal conductivity of 45 W/m K.
The inside and outside surfaces of the wall are maintained at 40°C and 80°C, respectively. What is the
temperature inside the wall at a distance of 19 cm measured from the inside surface of the wall? Express
your answer in °C.
Chapter 19 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 19 - 9. What temperature gradient must exist in an...Ch. 19 - Prob. 10SPCh. 19 - 11. Suppose the area of a window on a passenger...Ch. 19 - 12. The temperature on the inside face of a glass...Ch. 19 - 13. A sheet of ice 1.0 m by 1.0 m and 1.0 cm thick...Ch. 19 - Prob. 14SPCh. 19 - 15. How many grams of water at 100 °C can be...Ch. 19 - 19.16 [II] A certain double-pane window consists...Ch. 19 - 17. Determine the R value for a 2.54-cm-thick...Ch. 19 - Prob. 18SP
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- An aluminum bar has a cross-section that is 2.5 cm by 4.8 cm and is 1.3 m long. Aluminum has a thermal conductivity of 205 W/m K. If the aluminum bar is used to bridge between ice at 0 °C and boiling water at 100 °C, what is the rate of heat transfer (in W) along the bar?arrow_forwardAn aluminium object with a mass of 4.97 kg and at a temperature of 26.8 °C comes to thermal contact with a 9.98 kg copper object which is initially at a temperature of 85.3 °C. What is going to be the equilibrum temperature of the two objects? Neglect heat transfer between the objects and the environment. The specific heats are: CAI = 900 J/kg°C and ccu = 387 J/kg°C.arrow_forwardThe exhaust duct from a heater has an inside diameter of 114.3 mm with ceramic walls 6.4 mm thick. The average k = 1.52 W/mK. Outside this wall, an insulation of rock wool 102 mm thick is installed. The thermal conductivity of the rock wool is k = 0.046+1.56*10-4T (°C) (W/mK). The inside surface temperature of the ceramic is T1= 588.7 K, and the outside surface temperature of the insulation is T3= 311 K. Calculate the heat loss for 1.5 m of duct and the interface temperature T2between the ceramic and the insulation.Assumesteady heat transfer.Hint: The correct value of km for insulation is that evaluated at the mean temperature of T2+T3/2. Hence, for the first trial assume a mean temperature of, say, 448 K. Then, calculate the heat loss and T2. Using this new T2, calculate a new mean temperature and proceed as before.arrow_forward
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