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 21Q
To determine

To Explain:

Why a 22oC day is warm while a swimming pool at 22oC

feels cool.

Expert Solution & Answer
Check Mark

Answer to Problem 21Q

Solution:

Air is a poor conductor of heat and has a smaller heat capacity which reduces the rate of heat loss to the air is small.

Explanation of Solution

Air is a poor conductor of heat. Hence, the rate of heat loss from our body to the air is much less than heat loss from our body to the water. As we lose heat quickly in the water and feel cold.

Also, water has a high heat capacity, so as heat leaves your body and enters the water, the temperature rises for the water close to our body is small. Air has a smaller heat capacity, so the temperature rises for the air close to our body is larger. This reduces the temperature difference between your body and the air, which reduces the rate of heat loss to the air as well.

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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