Physics: Principles with Applications
Physics: Principles with Applications
6th Edition
ISBN: 9780130606204
Author: Douglas C. Giancoli
Publisher: Prentice Hall
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Chapter 14, Problem 17Q
To determine

To Explain:

Goose down sleeping bags and parkas are often specified as so many inches or centimetres of loft, the actual thickness of the garment when it is fluffed up.

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Explanation of Solution

Introduction:

An insulating material's resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value - the higher the R-value, the greater the insulating effectiveness.

The loft value is similar to R value of insulator. The thickness of conductor is proportional to loft value. When garment is fluffed up, the is bounded inside the garment’s structure. As we know, the thermal conductivity of air is low. Therefore, it makes the garment as good insulator.The thermal conduction rate varies inversely with thickness. As the garment is thick which means it has low thermal conduction rate and body loses heat at a slow rate.

Chapter 14 Solutions

Physics: Principles with Applications

Ch. 14 - Prob. 11QCh. 14 - 11. Explorers on failed Arctic expeditions have...Ch. 14 - Prob. 13QCh. 14 - Prob. 14QCh. 14 - Prob. 15QCh. 14 - Prob. 16QCh. 14 - Prob. 17QCh. 14 - Prob. 18QCh. 14 - Prob. 19QCh. 14 - Prob. 20QCh. 14 - Prob. 21QCh. 14 - Prob. 22QCh. 14 - A premature baby in an incubator can be...Ch. 14 - Prob. 24QCh. 14 - Prob. 25QCh. 14 - Prob. 26QCh. 14 - 26. The Earth cools off at night much more quickly...Ch. 14 - Prob. 28QCh. 14 - Prob. 29QCh. 14 - Prob. 30QCh. 14 - To what temperature will 8200 J of heat raise 3.0...Ch. 14 - How much heat (in joules) is required to raise the...Ch. 14 - Prob. 3PCh. 14 - An average active person consumes about 2500 Cal a...Ch. 14 - A British thermal unit (Btu) is a unit of heat in...Ch. 14 - How many joules and kilocalories are generated...Ch. 14 - A water heater can generate 32,000 kJ/h. How much...Ch. 14 - Prob. 8PCh. 14 - An automobile cooling system holds 18 L of water....Ch. 14 - What is the specific heat of a metal substance if...Ch. 14 - (a) How much energy is required to bring a 1.0-L...Ch. 14 - Prob. 12PCh. 14 - 14. (II) What will be the equilibrium temperature...Ch. 14 - A 31.5-g glass thermometer reads 23.6°C before it...Ch. 14 - A 0.40-kg iron horseshoe, just forged and very hot...Ch. 14 - Prob. 16PCh. 14 - The heat capacity, C, ofan object is defined as...Ch. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Estimate the Calorie content of 65 g of candy from...Ch. 14 - Prob. 22PCh. 14 - If 3.40 x 105 J of energy is supplied to a...Ch. 14 - How much heat is needed to melt 23.50 kg of silver...Ch. 14 - Prob. 25PCh. 14 - What mass of steam at 100°C must be added to 1.00...Ch. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - A cube of ice is taken from the freezer at -8.5°C...Ch. 14 - Prob. 34PCh. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - Prob. 37PCh. 14 - 39. How long does it take the Sun to melt a block...Ch. 14 - Prob. 39PCh. 14 - Two rooms, each a cube 4.0 m per side, share a...Ch. 14 - Prob. 41PCh. 14 - Approximately how long should it take 8.2 kg of...Ch. 14 - Prob. 43PCh. 14 - Suppose the insulating qualities of the wall of a...Ch. 14 - Prob. 45GPCh. 14 - Prob. 46GPCh. 14 - Prob. 47GPCh. 14 - Prob. 48GPCh. 14 - Prob. 49GPCh. 14 - Prob. 50GPCh. 14 - Prob. 51GPCh. 14 - Prob. 52GPCh. 14 - Prob. 53GPCh. 14 - Prob. 54GPCh. 14 - Prob. 55GPCh. 14 - Prob. 56GPCh. 14 - Prob. 57GPCh. 14 - Prob. 58GPCh. 14 - Prob. 59GPCh. 14 - Prob. 60GPCh. 14 - Prob. 61GPCh. 14 - Prob. 62GPCh. 14 - Prob. 63GPCh. 14 - Prob. 64GPCh. 14 - Prob. 65GPCh. 14 - Prob. 66GP
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