Due to a temperature difference AT, heat is conducted through an aluminum plate that is 0.0331 m thick. The plate is then replaced bya stainless steel plate that has the same temperature difference and cross-sectional area. How thick should the steel plate be, so thatthe same amount of heat per second is conducted through it? Thermal conductivities of steel and aluminum are 14 J/(s-m-C°) and 240J/(s-m-C°), respectively.NumberUnits

Thickness of aluminum plate (t) = 0.0331 m Thickness of steel plate = t' Thermal conductivity of…

Answered: Due to a temperature difference AT,…

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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36. GO A copper pipe with an outer radius of 0.013 m runs from an outdoor wall faucet into the interior of a house. The temperature of the faucet is 4.0 °C, and the temperature of the pipe, at 3.0 m from the faucet, is 25 °C. In fifteen minutes, the pipe conducts a total of 270 J of heat to the outdoor faucet from the house interior. Find the inner radius of the pipe. Ignore any water inside the pipe.
Question 4If a copper kettle has a base of thickness 2 mm and area 3 x 10^-2 m², estimate the steady difference in temperature between inner and outer surfaces of the base which must be maintained to enable enough heat to pass through so that the temperature of 1 kg of water rises at the rate of 0.25 K s^-1. Assume that there are no heat losses, the thermal conductivity of copper = 380 Wm^-1K^-1. and the specific heat capacity of water is 4200 Jkg^-1 K^-1.
A temperature difference of 52 K is maintained between the sides of a 3.6-cm thick slab of plywood. What is the rate of heat transfer through a 44-cm2 area of the slab?
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A heavily insulated copper rod or diameter 2 cm and length 25 cm is used to pipe heat between two objects. If the rate of heat transfer is 100 W and the hot object has a temperature of 50oC, what is the temperature of the cold object in oC?
a) A house walls that are 16 cm thick and have an average thermal conductivity three times that of cork. Assume there are no windows or doors. The walls' surface area is 1450000 cm² and their inside surface is at 18 °C, while their outside surface is at 4°C. (Thermal conductivity of cork is 0.042 W/m°C) (1) Calculate the rate of heat conduction through house walls? (ii) How many 200oW room heaters would be needed to balance the heat transfer due to conduction? (approximate number) b) A spherical infrared heater of radius 6.2 cm has an emissivity of 0.71. What temperature must it run at if the required power is 0.5 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm- 2K-4) The temperature of the heater in Celsius =
A7
Q7
A0.23 kg metal block with an initial temperature of 38.1°C is dropped into a container holding 2.5 kg of water at14 °C. The final temperature of the block-water system is 23.4 °C. Assuming no heat exchange with surroundings, find how much energy is released by 1 Kg of the metal when the temperature is decreased by 1 C ?
Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an avera thermal conductivity of 0.027W/m°C. Assume there are no windows or doors. The surface area of the walle is 120m? and their inside surface is at 18.0°C, while their outside surface is at 5.00°c
Radioactive decay of elements in the earth’s interior results in a mean heat flux through the Earth’s surfaceof 5×10−2Wm−2. What is the flux expressed as a fraction of the energy flux due to thermal re-radiation of absorbed solar energy? If radioactive decay were the only heat source for the Earth, what would the Earth’s temperature be?
0.4 kg water is at room temperature 23 degrees in an aluminum container. An unknown metal with 0.5 kg mass is placed inside the water raising its temperature to 40 degrees. A)What is the specific heat of the unknown metal. B) Would the equilibrium temperature greater, less or the same if the system was not properly isolated.

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