Constants An aluminum bar has the desired length when at 14 °C. Part A How much stress is required to keep it at this length if the temperature increases to 33 °C? Young's modulus for the aluminum is E = 70x10° N/m? and the coeficient of thermal expansion of aluminium is 25x10 6 1/C Express your answer using two significant figures. ? F/A = N/m? Submit Request Answer Provide Feedback Next >

Constants An aluminum bar has the desired length when at 14 °C. Part A How much stress is required to keep it at this length if the temperature increases to 33 °C? Young's modulus for the aluminum is E = 70x10° N/m? and the coeficient of thermal expansion of aluminium is 25x10 6 1/C Express your answer using two significant figures. ? F/A = N/m? Submit Request Answer Provide Feedback Next >

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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Question 3 0.70 moles of an ideal gas expands adiabatiacally from 1.0 atm to 2.5 atm at a temperature of 30 Celsius. Calculate the values of QW, ΔΗ, Δ S, and Δ G. Use the editor to format your answer
I am doing some practice problems to prepare for an exam and i cannot solve this problem, specifically part a but I would like to check this problem A piston cylinder device contains 0.8 kg of air initially at 100 kPa, 27 °C. The air is now compressed slowly in a polytropic process during which PV^1.3 =constant, until the volume reaches 1/2 its original volume. The system is then heated at constant pressure until the volume gets back to its original value. NOTE: THIS IS NOT A CYCLE. Data: Rair = 0.287 kJ/kg K; Cv=0.731 kJ/kg K; Cp=1.018 kJ/kgK. a) Determine the amounts AND directions of the Work and Heat(each in kJ) for each of the two processes. show all work used to get your values. b) Sketch the two processes on a P-v diagram, clearly showing all three state points and the two processes with their directions.
An ideal gas at 20°C consists of 2.2 x 1022 atoms. 3.2 J of thermal energy are removed from the gas. Part A What is the new temperature in °C? Express your answer in degrees Celsius. DA ΑΣφ T = °C Submit Request Answer
You blow up a spherical balloon to a diameter of 59.0 cm until the absolute pressure inside is 1.10 atm and the temperature is 22.0 °C. Assume that all the gas in N₂ is of molar mass 28.0 g/mol. Part A Find the mass of a single N₂ molecule. Express your answer in kilograms. m = Submit Part B K= 15. ΑΣΦ Submit Request Answer How much translational kinetic energy does an average N₂ molecule have? Express your answer in joules. 15| ΑΣΦ ? Request Answer kg ? J Re
ConstanS T Pent Part A An experiment measures the temperature of a 400 g substance while steadily supplying heat to it. The figure shows the results of the experiment. (Figure 1) What is the specific heat of the solid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part B What is the specific heat of the liquid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part C Figure What is the melting temperature? Express your answer to two significant figures and include the appropriate units. T(°C) 80 ? 60 40 T, - Value Units 20 Q (kJ) 40 80 120 160 200 -20 Submit Request Answer -40