5th Edition

ISBN: 8220103026918

Author: Walker

Publisher: PEARSON

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Chapter 16, Problem 80GP

Thermal Storage Solar heating of a house is much more efficient if there is a way to store the thermal energy collected during the day to warm the house at night. Suppose one solar-heated home utilizes a concrete slab of area 12 m² and 25 cm thick. (a) If the density of concrete is 2400kg/m³, what is the mass of the slab? (b) The slab is exposed to sunlight and absorbs energy at a rate of 1.4 × 10⁷ J/h for 10 h. If it begins the day at 22 °C and has a specific heat of 750J/(kg.K), what is its temperature at sunset? (c) Model the concrete slab as being surrounded on both sides (contact area 24 m²) with a 2.0-m-thick layer of air in contact with a surface that is 5.0 °C cooler than the concrete. At sunset, what is the rate at which the concrete loses thermal energy by conduction through the air layer? (d) Model the concrete slab as having a surface area of 24 m² and surrounded by an environment 5.0 °C cooler than the concrete. If its emissivity is 0.94, what is the rate at which the concrete loses thermal energy by radiation at sunset?

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Chapter 16, Problem 79GP

Chapter 16, Problem 81GP

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Chapter 16 Solutions

EBK PHYSICS

Ch. 16.1 - Prob. 1EYU Ch. 16.2 - Is the size of a degree in the Fahrenheit scale...Ch. 16.3 - The following systems consist of a metal rod with...Ch. 16.4 - Prob. 4EYU Ch. 16.5 - Prob. 5EYU Ch. 16.6 - The following systems consist of a cylindrical...Ch. 16 - Prob. 1CQ Ch. 16 - Prob. 2CQ Ch. 16 - Prob. 3CQ Ch. 16 - If the glass in a glass thermometer had the same...

Ch. 16 - Prob. 5CQ Ch. 16 - Sometimes the metal lid on a glass jar has been...Ch. 16 - Prob. 7CQ Ch. 16 - The specific heat of concrete is greater than that...Ch. 16 - When you touch a piece of metal and a piece of...Ch. 16 - The rate of heat flow through a slab does not...Ch. 16 - Prob. 11CQ Ch. 16 - Updrafts of air allow hawks and eagles to glide...Ch. 16 - BIO The fur of polar bears consists of hollow...Ch. 16 - Object 2 has twice the emissivity of object 1,...Ch. 16 - Prob. 1PCE Ch. 16 - Prob. 2PCE Ch. 16 - Incandescent lightbulbs heat a tungsten filament...Ch. 16 - Normal body temperature for humans is 98.6 F. What...Ch. 16 - The temperature at the surface of the Sun is about...Ch. 16 - One day you notice that the outside temperature...Ch. 16 - The gas in a constant-volume gas thermometer has a...Ch. 16 - Prob. 8PCE Ch. 16 - Greatest Change in Temperature A world record for...Ch. 16 - Prob. 10PCE Ch. 16 - Prob. 11PCE Ch. 16 - When the bulb of a constant-volume gas thermometer...Ch. 16 - Bimetallic strip A is made of copper and steel;...Ch. 16 - Prob. 14PCE Ch. 16 - Predict/Explain A brass plate has a circular hole...Ch. 16 - Figure 16-25 shows five metal plates, all at the...Ch. 16 - Longest Suspension Bridge The worlds longest...Ch. 16 - A vinyl siding panel for a house is installed on a...Ch. 16 - A cylinder bore in an aluminum engine block has a...Ch. 16 - Prob. 20PCE Ch. 16 - At 18.75 C a brass sleeve has an inside diameter...Ch. 16 - Early in the morning, when the temperature is 5.5...Ch. 16 - Some cookware has a stainless steel interior ( =...Ch. 16 - Predict/Calculate You construct two wire-frame...Ch. 16 - A metal ball that is 1.2 m in diameter expands by...Ch. 16 - A copper ball with a radius of 1.7 cm is heated...Ch. 16 - Predict/Calculate An aluminum saucepan with a...Ch. 16 - Prob. 28PCE Ch. 16 - BIO An exercise machine indicates that you have...Ch. 16 - BIO A certain sandwich cookie contains 53 C of...Ch. 16 - BIO During a workout, a person repeatedly lifts a...Ch. 16 - Prob. 32PCE Ch. 16 - BIO It was shown in Example 16-18 that a typical...Ch. 16 - Predict/Explain Two objects are made of the same...Ch. 16 - Prob. 35PCE Ch. 16 - Prob. 36PCE Ch. 16 - Prob. 37PCE Ch. 16 - A 9.7-g lead bullet is fired into a fence post....Ch. 16 - Prob. 39PCE Ch. 16 - Prob. 40PCE Ch. 16 - A 225-g lead ball at a temperature of 81.2 C is...Ch. 16 - If 2200 J of heat are added to a 190-g object, its...Ch. 16 - Chips by the Ton Tortilla chips are manufactured...Ch. 16 - Prob. 44PCE Ch. 16 - To determine the specific heat of an object, a...Ch. 16 - Predict/Calculate A student drops a 0.33-kg piece...Ch. 16 - Prob. 47PCE Ch. 16 - Predict/Explain In a popular lecture...Ch. 16 - Figure 16-27 shows a composite slab of three...Ch. 16 - Figure 16-28 Problem 50 50. CE Heat is...Ch. 16 - Predict/Explain Two identical bowls of casserole...Ch. 16 - Two bowls of soup with identical temperatures are...Ch. 16 - A glass window 0.33 cm thick measures 81 cm by 39...Ch. 16 - BIO Assuming your skin temperature is 37.2 C and...Ch. 16 - Find the heat that flows in 1.0 s through a lead...Ch. 16 - Consider a double-paned window consisting of two...Ch. 16 - Predict/Calculate Two metal rods of equal...Ch. 16 - Two cylindrical metal rodsone copper, the other...Ch. 16 - Prob. 59PCE Ch. 16 - Predict/Calculate Consider two cylindrical metal...Ch. 16 - A copper rod 85 cm long is used to poke a fire....Ch. 16 - Two identical objects are placed in a room at 24...Ch. 16 - A block has the dimensions L, 2L, and 3L. When one...Ch. 16 - Prob. 64GP Ch. 16 - CE A copper ring stands on edge with a metal rod...Ch. 16 - CE Referring to the copper ring in the previous...Ch. 16 - Prob. 67GP Ch. 16 - Making Steel Sheets In the continuous-caster...Ch. 16 - The Coldest Place in the Universe The Boomerang...Ch. 16 - BIO The Hottest Living Things From the surreal...Ch. 16 - Thermal energy is added to 180 g of water at a...Ch. 16 - Prob. 72GP Ch. 16 - BIO Brain Power As you read this problem, your...Ch. 16 - BIO Brain Food Your brain consumes about 22 W of...Ch. 16 - BIO The Cricket Thermometer The rate of chirping...Ch. 16 - Predict/Calculate A pendulum consists of a large...Ch. 16 - Prob. 77GP Ch. 16 - A256-kg rock sits in full sunlight on the edge of...Ch. 16 - Prob. 79GP Ch. 16 - Thermal Storage Solar heating of a house is much...Ch. 16 - Pave It Over Suppose city 1 leaves an entire block...Ch. 16 - Prob. 82GP Ch. 16 - You turn a crank on a device similar to that shown...Ch. 16 - Prob. 84GP Ch. 16 - The Solar Constant The surface of the Sun has a...Ch. 16 - Bars of two different metals are bolted together,...Ch. 16 - A grandfather clock has a simple brass pendulum of...Ch. 16 - Prob. 88GP Ch. 16 - A layer of ice has formed on a small pond. The air...Ch. 16 - A Double-Paned Window An energy-efficient...Ch. 16 - Cool Medicine In situations in which the brain is...Ch. 16 - Cool Medicine In situations in which the brain is...Ch. 16 - Cool Medicine In situations in which the brain is...Ch. 16 - Prob. 94PP Ch. 16 - Referring to Example 16-12 Suppose the mass of the...Ch. 16 - Referring to Example 16-12 Suppose the initial...Ch. 16 - Prob. 97PP Ch. 16 - Predict/Calculate Referring to Example 16-16...

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