College Physics
1st Edition
ISBN: 9781938168000
Author: Paul Peter Urone, Roger Hinrichs
Publisher: OpenStax College
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 14, Problem 53PE
A person inhales and exhales 2.00 L of
(a) How much
(b) What is the rate of heat transfer in watts if the person is breathing at a moderate rate of 18.0 breaths per minute?
(c) If the inhaled air had a temperature of
(d) Discuss the total rate of heat transfer as it relates to typical
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Consider a 20 cm thick granite wall with a thermal conductivity of 2.79 W/m·K. The temperature of the left surface is held constant at 50°C, whereas the right face is exposed to a flow of 22°C air with a convection heat transfer coefficient of 15 W/m2·K. Neglecting heat transfer by radiation, find the right wall surface temperature and the heat flux through the wall.
The north wall of an electrically heated home is 20 ft long, 10 ft high, and 1 ft thick, and is made of brick whose thermal conductivity is k = 0.42 Btu/h·ft·°F. On a certain winter night, the temperatures of the inner and the outer surfaces of the wall are measured to be at about 62°F and 25°F, respectively, for a period of 8 h. Determine (a) the rate of heat loss through the wall that night and (b) the cost of that heat loss to the home owner if the cost of electricity is $0.07/kWh.
An aluminum wire is wrapped in rubber insulation. Both are subject to thermal expansion, with the following coefficients of linear expansion: alphaa=24· 10−6 1/C and alphar=8· 10−5 1/C . If the wire and insulation are the same length of 1.85m at a temperature of20.00°C, what is the difference in length (in MILLIMETERS) between the copper wire and the rubber insulation when heated up to a temperature of 189.00°C? Express a magnitude only (no negatives!). ______mm (MILLIMETERS!)
Chapter 14 Solutions
College Physics
Ch. 14 - How is heat transfer related to temperature?Ch. 14 - Describe a situation in which heat transfer...Ch. 14 - When heal transfers into a system, is the energy...Ch. 14 - What three factors affect the heat transfer that...Ch. 14 - The brakes in a car increase in temperature by T...Ch. 14 - Heat transfer can cause temperature and phase...Ch. 14 - How does the latent heat of fusion of water help...Ch. 14 - What is me temperature of ice right after it is...Ch. 14 - If you place 0C ice into 0C water in an insulated...Ch. 14 - What effect does condensation on a glass of ice...
Ch. 14 - In my humid climates where there are numerous...Ch. 14 - In winters, if is often warmer in San Francisco...Ch. 14 - Putting a lid on a boiling pot greatly reduces the...Ch. 14 - Freeze-dried toads have been dehydrated in a...Ch. 14 - When still air cools by radiating at night, it is...Ch. 14 - In a physics classroom demonstration, an...Ch. 14 - What are the main methods of heat transfer front...Ch. 14 - Some electric sieves have a flat ceramic surface...Ch. 14 - Loosefitting white clothing covering most at the...Ch. 14 - One way to make a fireplace more energy efficient...Ch. 14 - On cold, clear nights horses will sleep under the...Ch. 14 - When watching a daytime circus in a large,...Ch. 14 - Satellites designed to observe me radiation from...Ch. 14 - Why are cloudy nights generally warmer than clear...Ch. 14 - Why are thermometers that are used in weather...Ch. 14 - On average, would Earth be warmer or cooler...Ch. 14 - On a hot day, the temperature of an 80,000L...Ch. 14 - Show that 1cal/gC=1kcal/kgC.Ch. 14 - To sterilize a 50.0g glass baby bottle, we must...Ch. 14 - The same heat transfer into identical masses of...Ch. 14 - Rubbing your hands together warms them by...Ch. 14 - A 0.250kg block at a pure material is heated from...Ch. 14 - Suppose identical amounts of heat transfer into...Ch. 14 - (a) The number of kilocalories in food is...Ch. 14 - Following Vigorous exercise, the body temperature...Ch. 14 - Even when shut down after a period of normal use,...Ch. 14 - How much heat transfer (in kilocalories) is...Ch. 14 - A bag containing 0C ice is much more effective in...Ch. 14 - (a) How much heat transfer is required to raise...Ch. 14 - The formation of condensation on a glass of ice...Ch. 14 - On a trip, you notice that a 3.50kg bag of ice...Ch. 14 - On a certain dry sunny day, a swimming pool’s...Ch. 14 - (a) How much heat transfer is necessary to raise...Ch. 14 - In 1986, a gargantuan iceberg broke away from the...Ch. 14 - How many grams of coffee must evaporate from 350 g...Ch. 14 - (a) It is difficult to extinguish a fire on a...Ch. 14 - The energy released from condensation in...Ch. 14 - To help prevent from damage, 4.00 kg at 0C water...Ch. 14 - A 0.250kg aluminum bowl holding 0.800 kg of soup...Ch. 14 - A 0.0500kg ice cube at 30.0C is placed in 0.400 kg...Ch. 14 - If you pour 0.0100 kg of 20.0C water onto a 1.20kg...Ch. 14 - Indigenous people sometimes cook in watertight...Ch. 14 - What would be the final temperature of the pan and...Ch. 14 - In some countries, liquid nitrogen is used on...Ch. 14 - Some gun fanciers make their own bullets, which...Ch. 14 - (a) Calculate the rate of heat conduction through...Ch. 14 - The rate of heat conduction out of a window on a...Ch. 14 - Calculate the rate of heat conduction out of the...Ch. 14 - Suppose you stand with one foot on ceramic...Ch. 14 - A man consumes 3000 kcal of food in one day....Ch. 14 - (a) A firewalker runs across a bed of hot coals...Ch. 14 - (a) What is the rate of heat conduction through...Ch. 14 - A walrus transfers energy by conduction through...Ch. 14 - Compare the rate of heat conduction through a...Ch. 14 - Suppose a person is covered head to foot by wool...Ch. 14 - Some stove tops are smooth ceramic for easy...Ch. 14 - One easy way to reduce heating (and cooling) costs...Ch. 14 - (a) Calculate the rate of heat conduction through...Ch. 14 - Many decisions are made on the basis of the...Ch. 14 - For the human body, what is the rate of heat...Ch. 14 - At what wind speed does 10C air cause the same...Ch. 14 - At what temperature does still air cause the same...Ch. 14 - The “steam” above a freshly made cup of instant...Ch. 14 - (a) How many kilograms of water must evaporate...Ch. 14 - On a hot dry day, evaporation from a lake has just...Ch. 14 - One winter day, the climate control system of a...Ch. 14 - The Kilauea volcano in Hawaii is the world’s most...Ch. 14 - During heavy exercise, the body pumps 2.00 L of...Ch. 14 - A person inhales and exhales 2.00 L of 37.0C air,...Ch. 14 - A glass coffee pot has a circular bottom with a...Ch. 14 - At what net rate does heat radiate from a 275m2...Ch. 14 - (a) Cherry-red embers in a fireplace are at 850C...Ch. 14 - Radiation makes it impossible to stand close to a...Ch. 14 - (a) Calculate the rate of heat transfer by...Ch. 14 - Find the net rate of heat transfer by radiation...Ch. 14 - Suppose you walk into a sauna that has an ambient...Ch. 14 - Thermography is a technique for measuring radiant...Ch. 14 - The Sun radiates like a perfect black body with an...Ch. 14 - A large body of lava from a volcano has stopped...Ch. 14 - Calculate the temperature the entire sky would...Ch. 14 - (a) A shirtless rider under a circus tent feels...Ch. 14 - Integrated Concepts One 30.0C day the relative...Ch. 14 - Integrated Concepts Large meteors sometimes strike...Ch. 14 - Integrated Concepts Frozen waste from airplane...Ch. 14 - €69. Integrated Concepts (a) A large electrical...Ch. 14 - Integrated Concepts (a) Suppose you start a...Ch. 14 - Integrated Concepts A 76.0-kg person suffering...Ch. 14 - Integrated Concepts In certain large geographic...Ch. 14 - Integrated Concepts Heat transfers from your lungs...Ch. 14 - Integrated Concepts (a) What is the temperature...Ch. 14 - Integrated Concepts Hot air rises because it has...Ch. 14 - Unreasonable Results (a) What is the temperature...Ch. 14 - Unreasonable Results A slightly deranged Arctic...Ch. 14 - Unreasonable Results (a) Calculate the rate of...Ch. 14 - Unreasonable Results A meteorite 1.20 cm in...Ch. 14 - Construct Your Own Problem Consider a new model of...Ch. 14 - Construct Your Own Problem Consider a person...
Additional Science Textbook Solutions
Find more solutions based on key concepts
68. The horizontal pipe shown in Figure 13.45 has a cross-sectional area of 40.0 cm2 at the wider portions and ...
College Physics (10th Edition)
Consider the following scenario. A car for which friction is not negligible accelerates from rest down a hill, ...
University Physics Volume 1
The pV-diagram of the Carnot cycle.
Sears And Zemansky's University Physics With Modern Physics
TEST YOUR UNDERSTANDING OF SECTION 21.1 Two charged objects repel each other through the electric force. The ch...
University Physics with Modern Physics (14th Edition)
The proton is a composite particle composed of three quarks, all of which are either up quarks (u; charge +23e)...
Essential University Physics: Volume 2 (3rd Edition)
5. A 65 kg gymnast wedges himself between two closely spaced vertical walls by pressing his hands and feet ag...
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Consider the latent heat of fusion and the latent heat of vaporization for H2O, 3.33 105 J/kg and 2.256 106 J/kg, respectively. How much heat is needed to a. melt 2.00 kg of ice and b. vaporize 2.00 kg of water? Assume the temperatures of the ice and steam are at the melting point and vaporization point, respectively. (a). UsingEq21.9, Q = mLF = (2.00 kg) (3.33l05 J/kg) = 6.66105 J (b).UsingEq21.10. Q = mLV = (2.00kg) (2.256106 J/kg) = 14.51106 Jarrow_forwardAn underground gasoline tank can hold 1.00 103 gallons of gasoline at 52.0F. If the tank is being filled on a day when the outdoor temperature (and the gasoline in a tanker truck) is 95.0F, how many gallons from the truck can be poured into the tank? Assume the temperature of the gasoline quickly cools from 95.0F to 52.0F upon entering the tank.arrow_forwardTwo concrete spans that form a bridge of length L are placed end to end so that no room is allowed for expansion (Fig. P16.63a). If a temperature increase of T occurs, what is the height y to which the spans rise when they buckle (Fig. P16.63b)?arrow_forward
- In 1993, the U.S. government instituted a requirement that all room air conditioners sold in the United States must have an energy efficiency ratio (EER) of 10 or higher. The EER is defined as the ratio of the cooling capacity of the air conditioner, measured in British thermal units per hour, or Btu/h, to its electrical power requirement in watts. (a) Convert the EER of 10.0 to dimensionless form, using the conversion 1 Btu = 1 055 J. (b) What is the appropriate name for this dimensionless quantity? (c) In the 1970s, it was common to find room air conditioners with EERs of 5 or lower. State how the operating costs compare for 10 000-Btu/h air conditioners with EERs of 5.00 and 10.0. Assume each air conditioner operates for 1 500 h during the summer in a city where electricity costs 17.0 per kWh.arrow_forwardThe maximum amount of water an adult in temperate climates can perspire in one hour is typically 1.8 L. However, after several weeks in a tropical climate the body can adapt, increasing the maximum perspiration rate to 3.5 L/h. At what rate, in watts, is energy being removed when perspiring that rapidly?Assume all of the perspired water evaporates. At body temperature, the heat of vaporization of water is Lv = 24 × 105 J/kg.arrow_forwardA completely sealed container, in the shape of a cube with side panels of length = 0.69 m, is full of carbonic ice at temperature -103.1 °C and placed in a room where the ambient temperature is 36.7 °C. The thickness of each (identical) panel of the container is 5.4 cm. In 1.6 days (s), an amount of 3383899 J of heat is conducted through the panels. Find the thermal conductivity of the material which the panels are made of.arrow_forward
- For the human body, what is the rate of heat transfer by conduction through the body’s tissue with the following conditions: the tissue thickness is 3.00 cm, the change in temperature is 2.00C, and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)arrow_forwardA glass window in a house has an area of 0.67 m^2 and a thickness of 2.4 mm. The temperature inside the house is 21 C, and the outside temperature is 0 C. How much heat is lost through the window in 1 hour (3600 s) due to conduction? Use 1.0 W/(m x C) for the thermal conductivity of the glass. How much heat is lsot through the window in 1 hour (3600 s) due to raditaion? ( assume the temperature of the rntire glass is 21 C for this probelem). Which mode of heat transfer (condutciton vs. raditiaon) accounts for the greater amount of heat loss?arrow_forwardSuppose a person inhales and exhales 2.25 L of 37.0°C air, evaporating 4.2 × 10-2 g of water from the lungs and breathing passages with each breath. 101.4 J of heat transfer (Q), in joules, occurs due to evaporation in each breath. The latent heat of vaporization of water at body temperature of 37° C is Lv = 2414 kJ/kg. a) What is the rate of heat transfer, in watts, if the person is breathing at a moderate rate of 18.0 breaths per minute? b) If the inhaled air had a temperature of 20.0°C, what is the rate of heat transfer, in watts, for warming the air to the body temperature of 37ºC? You may assume the temperature inside a human body is a constant 37.0°C, and the density of air at this temperature is 1.20 kg/m3.arrow_forward
- The tube in a heat exchanger has a 2-in inner diameter and a 3-in outer diameter. The thermal conductivity of the tube material is 0.5 Btu/h·ft·°F, while the inner surface heat transfer coefficient is 50 Btu/h·ft2·°F and the outer surface heat transfer coefficient is 10 Btu/h·ft2·°F. Determine the overall heat transfer coefficients based on the outer and inner surfaces.arrow_forwardFor the human body, what is the rate of heat transfer by conduction through the body’s tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 °C , and the skin area is 1.50 m2 .How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)arrow_forwardA thermal window, with an area of 6.0m ^ 2, is constructed of two layers of glass, each 4.0mm thick, separated from each other by a 5.0mm air gap. If the inner surface is at 20.0 ° C and the outer surface is at -5.0 ° C, what is the rate of energy transfer by conduction through the window? The thermal conductivity of glass is 0.8 W⁄ (m. ° C) and that of air is 0.023 W⁄ (m. ° C)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...
Physics
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Heat Transfer: Crash Course Engineering #14; Author: CrashCourse;https://www.youtube.com/watch?v=YK7G6l_K6sA;License: Standard YouTube License, CC-BY