Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
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Chapter 19, Problem 68PQ
To determine
The two metals which create the most curvature when the strips temperature is changed.
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4. The diagram shows four slabs of different materials with equal thickness, placed side
by side. Heat flows from left to right and the steady-state temperature of the interfaces
are given. Rank the materials according to their thermal conductivities, smallest to
largest.
1
+ d →+ d →+ d – E d →
1
2
3
4
35° C
30° C 20° C
0° C
-15° C
а. 1, 2, 3, 4
b. 2, 1, 3, 4
с. 3,4, 1, 2
d. 3, 4, 2, 1
When a metal is heated, its atoms vibrate more about their position in the lattice (a network of crossed bars). This causes them to take up more space, so the solid metal expands from its original shape. Calculate the heat needed to expand a ring made of copper with an internal diameter of 50mm to fit over a shaft of diameter 50.05mm. The shaft is measured at a temperature 20 degrees c
Why is metal a better conductor of heat than non-metals?
In metals, apart from transferring heat energy by the relatively slow process of molecular collision, another faster process of free electron diffusion takes place.
Metals contain free electrons that are mobile.
When heated, these free electrons gains KE and will diffuse to the cooler end at high speeds.
In the process, they will collide with atoms at the cooler end and transfer kinetic energy to them.
Chapter 19 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 19.1 - The Fahrenheit scale remains useful in part due to...Ch. 19.2 - Prob. 19.2CECh. 19.3 - Prob. 19.3CECh. 19.3 - Prob. 19.4CECh. 19.4 - Prob. 19.5CECh. 19.5 - Prob. 19.6CECh. 19.6 - Prob. 19.7CECh. 19 - Prob. 1PQCh. 19 - Prob. 2PQCh. 19 - Prob. 3PQ
Ch. 19 - Prob. 4PQCh. 19 - Prob. 5PQCh. 19 - Prob. 6PQCh. 19 - Prob. 7PQCh. 19 - Prob. 8PQCh. 19 - Object A is placed in thermal contact with a very...Ch. 19 - Prob. 10PQCh. 19 - Prob. 11PQCh. 19 - Prob. 12PQCh. 19 - Prob. 13PQCh. 19 - The tallest building in Chicago is the Willis...Ch. 19 - Prob. 15PQCh. 19 - Prob. 16PQCh. 19 - At 22.0C, the radius of a solid aluminum sphere is...Ch. 19 - Prob. 18PQCh. 19 - Prob. 19PQCh. 19 - Prob. 20PQCh. 19 - The distance between telephone poles is 30.50 m in...Ch. 19 - Prob. 22PQCh. 19 - Prob. 23PQCh. 19 - Prob. 24PQCh. 19 - Prob. 25PQCh. 19 - Prob. 26PQCh. 19 - Prob. 27PQCh. 19 - Prob. 28PQCh. 19 - Prob. 29PQCh. 19 - Prob. 30PQCh. 19 - Prob. 31PQCh. 19 - Prob. 32PQCh. 19 - Prob. 33PQCh. 19 - Prob. 34PQCh. 19 - Prob. 35PQCh. 19 - Prob. 36PQCh. 19 - Prob. 37PQCh. 19 - Prob. 38PQCh. 19 - Prob. 39PQCh. 19 - On a hot summer day, the density of air at...Ch. 19 - Prob. 41PQCh. 19 - Prob. 42PQCh. 19 - Prob. 43PQCh. 19 - Prob. 44PQCh. 19 - Prob. 45PQCh. 19 - Prob. 46PQCh. 19 - Prob. 47PQCh. 19 - A triple-point cell such as the one shown in...Ch. 19 - An ideal gas is trapped inside a tube of uniform...Ch. 19 - Prob. 50PQCh. 19 - Prob. 51PQCh. 19 - Case Study When a constant-volume thermometer is...Ch. 19 - An air bubble starts rising from the bottom of a...Ch. 19 - Prob. 54PQCh. 19 - Prob. 55PQCh. 19 - Prob. 56PQCh. 19 - Prob. 57PQCh. 19 - Prob. 58PQCh. 19 - Prob. 59PQCh. 19 - Prob. 60PQCh. 19 - Prob. 61PQCh. 19 - Prob. 62PQCh. 19 - Prob. 63PQCh. 19 - Prob. 64PQCh. 19 - Prob. 65PQCh. 19 - Prob. 66PQCh. 19 - Prob. 67PQCh. 19 - Prob. 68PQCh. 19 - Prob. 69PQCh. 19 - Prob. 70PQCh. 19 - Prob. 71PQCh. 19 - A steel plate has a circular hole drilled in its...Ch. 19 - Prob. 73PQCh. 19 - A gas is in a container of volume V0 at pressure...Ch. 19 - Prob. 75PQCh. 19 - Prob. 76PQCh. 19 - Prob. 77PQCh. 19 - Prob. 78PQCh. 19 - Prob. 79PQCh. 19 - Prob. 80PQCh. 19 - Two glass bulbs of volumes 500 cm3 and 200 cm3 are...
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- A copper-constantan thermocouple generates a voltage of 4.75 x 10-3 volts when the temperature of the hot junction is 110 °C and the reference junction is kept at 0 °C. If the voltage is proportional to the difference in temperature between the junctions, what is the temperature in degrees Celsius of the hot junction when the voltage is 1.60 x 10-³ volts? Number i Units ↑arrow_forwardThe active element of a certain laser in made of a glass rod 28 cm long and 2.3 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9x10^-6 °C^-1 . If the temperature of the rod increases by 14 , what is the increase in its volume? Express your answer in cm^3arrow_forwardThe density of gray and white tin are 5.77 × 10³ kg/m³ and 7.37 × 10³ kg/m³. The latent heat for the transition between gray and white tin is 2.20 x 10³ J/mol. The atomic weight of tin is 118.7. Calculate the slope of the tangent of the coexistence curve of gray and white tin at T = 366 K. Select one: dP dT a. b. d. dT dP dP = -15.8 Pa/K = -14.7 atm/K = -13.3 atm/K = -16.6 Pa/Karrow_forward
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- *7. 00 A copper-constantan thermocouple generates a voltage of 4.75 x 10- volts when the temperature of the hot junction is 110.0 °C and the refer- ence junction is kept at a temperature of 0.0 °C. If the voltage is propor- tional to the difference in temperature between the junctions, what is the temperature of the hot junction when the voltage is 1.90 × 10-³ volts?arrow_forwardSolve the following problems. 1. A metal rod is 30.25 cm long at 25°C and 30.30 cm long at 100°C. Compute the approximate coefficient of linear expansion of the rod. 2. A 5 m long cylindrical copper pipe has an outer diameter of 3 cm and inside diameter of 2.5 cm initially at 20°c. Compute the approximate change in its surface area if it is to be heated at a temperature of 85°C. 3. What is the final volume of an aluminum circular rod 1.5 m long and with a diameter of 1.5 cm if it it to be heated from 17°C to 140c?arrow_forwardA copper-constantan thermocouple generates a voltage of 4.75 x 10-3 volts when the temperature of the hot junction is 110 °C and the reference junction is kept at 0 °C. If the voltage is proportional to the difference in temperature between the junctions, what is the temperature in degrees Celsius of the hot junction when the voltage is 2.35 x 10-3 volts? Number i Unitsarrow_forward
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