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A glass rod is 50 cm long and 0.020 m in diameter. The coefficient of volume expansion of the rod is 2.7 x 105 °C-'. When the temperature increases by 60 °K, its change in length in m is a.) 1.2 x 104, b.) 1.7 x 10°, c.) 2.9 x 104, d.) 1.7 x 104, e.) 2.7 x 104

A glass rod is 50 cm long and 0.020 m in diameter. The coefficient of volume expansion of the rod is 2.7 x 105 °C-'. When the temperature increases by 60 °K, its change in length in m is a.) 1.2 x 104, b.) 1.7 x 10°, c.) 2.9 x 104, d.) 1.7 x 104, e.) 2.7 x 104

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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### Educational Content for Physics Problems #### Problem 1: A glass rod is 50 cm long and 0.020 m in diameter. The coefficient of volume expansion of the rod is \(2.7 \times 10^{-5} \, ^\circ \text{C}^{-1}\). When the temperature increases by 60 K, its change in length in meters is: a.) \(1.2 \times 10^{-4}\) b.) \(1.7 \times 10^{-5}\) c.) \(2.9 \times 10^{-4}\) d.) \(1.7 \times 10^{-4}\) e.) \(2.7 \times 10^{-4}\) #### Problem 2: Two parallel current-carrying wires lie in the x-z plane. The wires are pushed apart when the directions of the electric current are: a.) when one wire is moved so that it runs perpendicular to the first, b.) when the current in the upper wire is turned off, c.) when the current in the upper wire doubles, d.) when the current directions are parallel, e.) when the current directions are anti-parallel. #### Problem 3: A fluid flows through a horizontal pipe of radius 1.5 cm at a speed of 5.0 m/s. The density of the fluid is 900 kg/m\(^3\) and the pressure is \(1.30 \times 10^5 \, \text{N/m}^2\). When the fluid flows into a connecting pipe of radius 1.0 cm, the speed increases to 11.0 m/s. What is the pressure in the connecting pipe in Pa? a.) \(8.7 \times 10^4\) b.) \(1.3 \times 10^5\) c.) \(4.4 \times 10^4\) e.) \(6.4 \times 10^4\) d.) \(1.8 \times 10^5\) #### Problem 4: The maximum allowed coefficient of performance for a heat pump operating between temperatures of 2 \( ^\circ \)C and 15 \( ^\circ \)C is: a.) 21.1 b.) 1.2 c.) 0.15 d.)
Transcribed Image Text:### Educational Content for Physics Problems #### Problem 1: A glass rod is 50 cm long and 0.020 m in diameter. The coefficient of volume expansion of the rod is \(2.7 \times 10^{-5} \, ^\circ \text{C}^{-1}\). When the temperature increases by 60 K, its change in length in meters is: a.) \(1.2 \times 10^{-4}\) b.) \(1.7 \times 10^{-5}\) c.) \(2.9 \times 10^{-4}\) d.) \(1.7 \times 10^{-4}\) e.) \(2.7 \times 10^{-4}\) #### Problem 2: Two parallel current-carrying wires lie in the x-z plane. The wires are pushed apart when the directions of the electric current are: a.) when one wire is moved so that it runs perpendicular to the first, b.) when the current in the upper wire is turned off, c.) when the current in the upper wire doubles, d.) when the current directions are parallel, e.) when the current directions are anti-parallel. #### Problem 3: A fluid flows through a horizontal pipe of radius 1.5 cm at a speed of 5.0 m/s. The density of the fluid is 900 kg/m\(^3\) and the pressure is \(1.30 \times 10^5 \, \text{N/m}^2\). When the fluid flows into a connecting pipe of radius 1.0 cm, the speed increases to 11.0 m/s. What is the pressure in the connecting pipe in Pa? a.) \(8.7 \times 10^4\) b.) \(1.3 \times 10^5\) c.) \(4.4 \times 10^4\) e.) \(6.4 \times 10^4\) d.) \(1.8 \times 10^5\) #### Problem 4: The maximum allowed coefficient of performance for a heat pump operating between temperatures of 2 \( ^\circ \)C and 15 \( ^\circ \)C is: a.) 21.1 b.) 1.2 c.) 0.15 d.)
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