Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN: 9781133939146
Author: Katz, Debora M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 21, Problem 56PQ
You extend an impromptu invitation to a friend for dinner. The only food you have is a couple of frozen steaks. You wish to defrost the steaks before grilling them. You defrost one by using your microwave oven, and you defrost the other by placing it in a bowl of very warm water. In each case, decide whether
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Thermal energy is being transferred through a 0.8 mm layer of human skin at a rate of 1.1 x 104 W/m2. The room temperature is 27 °C.To reduce heat flux, the skin is wrapped with a clothing material. What should be the thickness of the clothing material covering the surface of this skin tissue to reduce the heat flux to half of its original value? What is the temperature at the skin-clothing material interface?
Note: if you think you need to have more information to solve this problem, you can make assumptions. Please state them clearly in your answer, if you need to make such assumptions.And please explain step by step to the answer to better understanding
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to
sweat, and it is determined that the heat of vaporization of its sweat is 339 cal/g. The scientist observing the extraterrestrial
life form also begins to sweat. The heat of vaporization of the scientist's sweat is 580 cal/g at the skin's surface.
If both the extraterrestrial life form and the scientist lose 259 g of sweat over the course of one hour, calculate the heat lost by
each body from the vaporization of sweat.
extraterrestrial:
cal
human scientist:
cal
⦁ Consider the following physical cases. Choose the letter that correctly matches each roman numeral with the appropriate heat transport mechanism.
⦁ A young boy who jumps into a swimming pool feels cooler than the surroundings.⦁ On a freezing day, a gas station attendant finds the metal handle to a gasoline pump intolerably cold to grip.⦁ A camper gets warm in from of a campfire.
⦁ I. Convection II. Conduction III. Radiation⦁ I. Conduction II. Radiation III. Convection⦁ I. Radiation II. Convection III. Conduction⦁ I. Conduction II. Convection III. Radiation⦁ I. Radiation II. Conduction II. Convection
Chapter 21 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 21.2 - Incorrect. Heat is not contained in Texas. The...Ch. 21.3 - In each situation listed, an objects temperature...Ch. 21.4 - Prob. 21.3CECh. 21.4 - Prob. 21.4CECh. 21.7 - Prob. 21.5CECh. 21.7 - Prob. 21.6CECh. 21.7 - Prob. 21.7CECh. 21.7 - Prob. 21.8CECh. 21.7 - Prob. 21.9CECh. 21 - Prob. 1PQ
Ch. 21 - Prob. 2PQCh. 21 - You extend an impromptu invitation to a friend for...Ch. 21 - Prob. 4PQCh. 21 - Prob. 5PQCh. 21 - Prob. 6PQCh. 21 - Prob. 7PQCh. 21 - Prob. 8PQCh. 21 - Prob. 9PQCh. 21 - Prob. 10PQCh. 21 - Prob. 11PQCh. 21 - Prob. 12PQCh. 21 - Prob. 13PQCh. 21 - Prob. 14PQCh. 21 - Prob. 15PQCh. 21 - Prob. 16PQCh. 21 - Prob. 17PQCh. 21 - Prob. 18PQCh. 21 - Prob. 19PQCh. 21 - From Table 21.1, the specific heat of milk is 3.93...Ch. 21 - Prob. 21PQCh. 21 - Prob. 22PQCh. 21 - An ideal gas is confined to a cylindrical...Ch. 21 - Prob. 24PQCh. 21 - You place frozen soup (T = 17C) in a microwave...Ch. 21 - A 25-g ice cube at 0.0C is heated. After it first...Ch. 21 - Prob. 27PQCh. 21 - Prob. 28PQCh. 21 - Prob. 29PQCh. 21 - Prob. 30PQCh. 21 - Consider the latent heat of fusion and the latent...Ch. 21 - Prob. 32PQCh. 21 - Prob. 33PQCh. 21 - A thermodynamic cycle is shown in Figure P21.34...Ch. 21 - Prob. 35PQCh. 21 - Figure P21.36 shows a cyclic thermodynamic process...Ch. 21 - Figure P21.37 shows a PV diagram for a gas that is...Ch. 21 - Prob. 38PQCh. 21 - Prob. 39PQCh. 21 - Prob. 40PQCh. 21 - Prob. 41PQCh. 21 - Prob. 42PQCh. 21 - Prob. 43PQCh. 21 - Prob. 44PQCh. 21 - Figure P21.45 shows a cyclic process ABCDA for...Ch. 21 - Prob. 46PQCh. 21 - Prob. 47PQCh. 21 - Prob. 48PQCh. 21 - Prob. 49PQCh. 21 - Prob. 50PQCh. 21 - Prob. 51PQCh. 21 - Prob. 52PQCh. 21 - Prob. 53PQCh. 21 - Prob. 54PQCh. 21 - Prob. 55PQCh. 21 - You extend an impromptu invitation to a friend for...Ch. 21 - Prob. 57PQCh. 21 - Prob. 58PQCh. 21 - A lake is covered with ice that is 2.0 cm thick....Ch. 21 - A concerned mother is dressing her child for play...Ch. 21 - Prob. 61PQCh. 21 - Prob. 62PQCh. 21 - Prob. 63PQCh. 21 - Prob. 64PQCh. 21 - Prob. 65PQCh. 21 - Prob. 66PQCh. 21 - Prob. 67PQCh. 21 - Prob. 68PQCh. 21 - Three 100.0-g ice cubes initially at 0C are added...Ch. 21 - Prob. 70PQCh. 21 - Prob. 71PQCh. 21 - Prob. 72PQCh. 21 - Prob. 73PQCh. 21 - Prob. 74PQCh. 21 - Prob. 75PQCh. 21 - Prob. 76PQCh. 21 - Prob. 77PQCh. 21 - Prob. 78PQCh. 21 - How much faster does a cup of tea cool by 1C when...Ch. 21 - The PV diagram in Figure P21.80 shows a set of...Ch. 21 - Prob. 81PQCh. 21 - Prob. 82PQCh. 21 - Prob. 83PQCh. 21 - Prob. 84PQCh. 21 - Prob. 85PQ
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
- An insulated beaker with negligible mass contains a mass of 0.300 kg of water at a temperature of 66.1°C. Take the specific heat for water to be 4190 J/kg - K the specific heat for ice to be 2100 J/kg · K and the heat of fusion for water to be 334 kJ/kg. Part A For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Changes in both temperature and phase. How many kilograms of ice at a temperature of -20.5°C must be dropped in the water to make the final temperature of the system 23.2°C? Express your answer in kilograms. ΑΣΦ ? Mice = kg Submit Previous Answers Request Answerarrow_forwardThermal energy is being transferred through a 0.8 mm layer of human skin at a rate of 1.1 x 104 W/m2. The room temperature is 27 °C.Determine the thermal conductivity of the skin. note: if you think you need to have more information to solve this problem, you can make assumptions. Please state them clearly in your answer, if you need to make such assumptions.arrow_forwardYou recently bought an aluminum (C = 0.9 J/g-K) kettle with a mass of 2 kg. You used the kettle to heat water (C = 4.184 J/g-K). The kettle contains water (1.5 kg). The kettle was heated using an induction stove from 20°C to 85°C. The water is then used for coffee. If no heat is lost to the surroundings, what is the total heat added to raise the temperature?arrow_forward
- Geologists measure conductive heat flow out of the earth by drilling holes (a few hundred meters deep) and measuring the temperature as a function of depth. Suppose that in a certain location the temperature increases by 20°C per kilometer of depth and the thermal conductivity of the rock is 2.5 W/m·K. What is the rate of heat conduction per square meter in this location? Assuming that this value is typical of other locations over all of earth's surface, at approximately what rate is the earth losing heat via conduction? (The radius of the earth is 6400 km.)arrow_forwardA block of ice (m = 11 kg) at a temperature of T1 = 0 degrees C is placed out in the sun until it melts, and the temperature of the resulting water rises to T2 = 23 degrees C. Recall that the specific heat of water is c = 4186 J/(kg⋅K), and its latent heat of fusion is Lf = 3.34 × 105 J/kg. A: Input an expression for the amount of energy, Em, needed to melt the ice into water. B: Input an expression for the total amount of energy, Etot, to melt the ice and then bring the water to T2. C: What is this energy in joules?arrow_forward5 kg of fish (Cp =3600 J/KgK) is placed in a storage box that has A=0,45 m2 and k=0,025 W/mK. The storage box wall is 2 cm. The fish temperature within the box is -1°C when it is packed. a) how much heat goes through the storage box wall if it is forgotten outsite in 20°C b)How long time does it take the fish to get to the same temperature as the surronding.arrow_forward
- Ahmed places four different materials at the same temperature onto a hot plate to find out which material conducts heat slowly. The information presented in the illustration shows the temperature of each material after 15 minutes. Which of the following material conducts heat slowly? Temperature (°C) Material O min 15 min 1 100 73 2 100 90 3 100 94 4 100 62 a. material 4 b. material 3 c. material 2 d. material 1arrow_forwardA baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 31.0°C from 189°C, its net radiant power decreases to 13.0 W. What was the net radiant power of the baking dish when it was first removed from the oven? Assume that the temperature in the kitchen remains at 24.0°C as the dish cools.arrow_forwardA 0.075-kg ice cube at -30.0°C is placed in 0.375 kg of 35.0°C water in a very well-insulated container. The latent heat of fusion for water is Lf = 79.8 kcal/kg. Part A: What is the final temperature of the water, in degrees Celsius?arrow_forward
- A family comes home from a long vacation with laundry to do and showers to take. The water heater has been turned off during vacation. If the water heater has a capacity of 51.3 gallons and a 4940 W heating element, how much time is required to raise the temperature of the water from 19.4°C to 63.3°C? Assume that the heater is well insulated and no water is withdrawn from the tank during this time.arrow_forwardA 150 kg quantity of a certain metal, initially at 120°C, is dropped into an insulated beaker containing 100 g of water at 20°C. The final temp of the metal and water in the beaker is measured at 35°C. Assume that the heat capacity of the beaker can be ignored. a. How much heat has been transferred from the metal to the water? b. Given the temp change and mass of the metal, what is the specific heat capacity of the metal? c. If the final temp of the water and this metal is 70°C instead of 35°C, what quantity of this metal was dropped into the insulated beaker?arrow_forwardHow much energy does Hannah the Standard Poodle absorb from the sun during a 37-minute walk? Hannah’s fur is matte black, so she absorbs nearly all of the sunlight that hits her; from above, she looks approximately like a rectangle that is 92 cm long and 32 cm wide. The solar intensity in Hannah’s Orange County neighborhood is 1200 W/m2.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Heat Transfer: Crash Course Engineering #14; Author: CrashCourse;https://www.youtube.com/watch?v=YK7G6l_K6sA;License: Standard YouTube License, CC-BY