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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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When the pioneers were crossing the plains in covered wagons, a metal rim could be attached to a wooden wagon wheel by heating the rim to expand it and then placing it over the wheel before it cooled. The shrink-attachment would firmly hold the rim in place and strengthen the wooden wheel. Suppose a certain wooden wagon wheel has an outer circumference of 300.0 cm and that its iron rim has an inside circumference of 299.5 cm when it is at 15° C. To what temperature must the rim be heated so that it will just fit over the wheel?
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- When the temperature of a coin is raised by 82 °F, the coin's diameter increases by 2.20 x 10-5 m. If the original diameter is 2.15 x 10-2 m, find the coefficient of linear expansion.arrow_forwardOn a day that the temperature is 6.0°C, a concrete walk is poured in such a way that the ends of the walk are unable to move. Take Young's modulus for concrete to be 7.00 × 109 N/m² and the compressive strength to be 2.00 x 109 N/m². (The coefficient of linear expansion of concrete is 1.2 × 10-5 (°C-¹).) (a) What is the stress in the cement on a hot day of 49.0°C? N/m² (b) Does the concrete fracture? ○ Yes ○ Noarrow_forwardThe temperature of a spere is raised in by 300˚C. The coefficient of volume expansion of the sphere is 47x10-6 C degree. By what percentage does volume increase? (a)3.22% (b)2.01% (c)1.41% (d)2.81%arrow_forward
- 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 (Figure 1). The rod consists of a 1.00m section of copper (with one end in the boiling water) joined end-to-end to a length L2 of steel (with one end in the ice water). 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 reached. Assume that the thermal conductivities of copper and steel are given by kcopper=385 W/m⋅K and ksteel=50.2 W/m⋅K. How much heat per second H (=Q/Δt) flows from the boiling water to the ice-water mixture?arrow_forwardA 250-m-long bridge is improperly designed so that it cannot expand with temperature. It is made of concrete with a = 12 × 10-° (°C)~'. (a) Assuming the maximum change in temperature at the site is expected to be 20°C, find the change in length the span would undergo if it were free to expand. (b) Show that the stress on an object with Young's modulus Y when raised by AT with its ends firmly fixed is given by «YAT. (c) If the maximum stress the bridge can withstand without crumbling is 2.0 x 107 Pa, will it crumble because of this temperature increase? Young's modulus for concrete is about 2.0 × 101º Pa.arrow_forwardCalculate the total heat transfer from the 5.0 m² surface shown in the figure. Tur = 0°C h = 40 W/m²-K T = 180°C ɛ = 0.90 fluid T = 10°C insulatedarrow_forward
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