Physics for Scientists and Engineers: Foundations and Connections
15th Edition
ISBN: 9781305289963
Author: Debora M. Katz
Publisher: Cengage Custom Learning
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 22, Problem 78PQ
(a)
To determine
The energy delivered in night.
(b)
To determine
The energy extracted by the heater from the outside air.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A freezer has a coefficient of performance of 6.30. It is advertised as using 376 kWh/yr. Note: One kilowatt-hour (kWh) is an amount of energy equal to running a 1-kW appliance for one hour.
(a) On average, how much energy does it use in a single day?
(b) On average, how much energy does it remove from the refrigerator in a single day?
(c) What maximum mass of water at 19.7°C could the freezer freeze in a single day? (The latent heat of fusion of water is 3.33 105 J/kg, and its specific heat is 4186 J/kg · °C.)
An coal-fired steam turbine engine has an electric generator that operates between 1870°C and 430°C.
a. What is its maximum theoretical efficiency?
b. Suppose that its actual efficiency is 42%. How much mechanical power does the engine deliver if it absorbs 140000 J of energy each second from the hot reservoir
A freezer has a coefficient of performance of 6.30. It is advertised as using electricity at a rate of 457 kWh/yr. (a) On average, how much energy does it use in a single day? (b) On average, how much energy does it remove from the refrigerator in a single day? (c) What maximum mass of water at 20.0°C could the freezer freeze in a single day? Note: One kilowatt-hour (kWh) is an amount of energy equal to running a 1-kW appliance for one hour.
Chapter 22 Solutions
Physics for Scientists and Engineers: Foundations and Connections
Ch. 22.2 - Prob. 22.1CECh. 22.4 - Prob. 22.2CECh. 22.5 - Prob. 22.3CECh. 22.7 - You have considerable intuition about whether some...Ch. 22.9 - Prob. 22.5CECh. 22 - Prob. 1PQCh. 22 - Heat Engines Figure P22.2 shows a Carnot cycle....Ch. 22 - Use a PV diagram such as the one in Figure 22.2...Ch. 22 - Prob. 4PQCh. 22 - Prob. 5PQ
Ch. 22 - Prob. 6PQCh. 22 - An engine with an efficiency of 0.36 can supply a...Ch. 22 - Prob. 8PQCh. 22 - Prob. 9PQCh. 22 - Prob. 10PQCh. 22 - Prob. 11PQCh. 22 - Prob. 12PQCh. 22 - Prob. 13PQCh. 22 - Prob. 14PQCh. 22 - Prob. 15PQCh. 22 - Prob. 16PQCh. 22 - Prob. 17PQCh. 22 - Prob. 18PQCh. 22 - Prob. 19PQCh. 22 - Prob. 20PQCh. 22 - Prob. 21PQCh. 22 - In 1816, Robert Stirling, a Scottish minister,...Ch. 22 - Prob. 23PQCh. 22 - Prob. 24PQCh. 22 - Prob. 25PQCh. 22 - Prob. 26PQCh. 22 - Prob. 27PQCh. 22 - Prob. 28PQCh. 22 - Prob. 29PQCh. 22 - Prob. 30PQCh. 22 - Prob. 31PQCh. 22 - Prob. 32PQCh. 22 - Prob. 33PQCh. 22 - Prob. 34PQCh. 22 - Prob. 35PQCh. 22 - Estimate the change in entropy of the Universe if...Ch. 22 - Prob. 37PQCh. 22 - Prob. 38PQCh. 22 - Prob. 39PQCh. 22 - Prob. 40PQCh. 22 - Prob. 41PQCh. 22 - Prob. 42PQCh. 22 - Prob. 43PQCh. 22 - Prob. 44PQCh. 22 - Prob. 45PQCh. 22 - Prob. 46PQCh. 22 - Prob. 47PQCh. 22 - Prob. 48PQCh. 22 - Prob. 49PQCh. 22 - Prob. 50PQCh. 22 - Prob. 51PQCh. 22 - Prob. 52PQCh. 22 - Prob. 53PQCh. 22 - Prob. 54PQCh. 22 - Prob. 55PQCh. 22 - Prob. 56PQCh. 22 - What is the entropy of a freshly shuffled deck of...Ch. 22 - Prob. 58PQCh. 22 - Prob. 59PQCh. 22 - Prob. 60PQCh. 22 - Prob. 61PQCh. 22 - Prob. 62PQCh. 22 - Prob. 63PQCh. 22 - Prob. 64PQCh. 22 - Prob. 65PQCh. 22 - Prob. 66PQCh. 22 - Prob. 67PQCh. 22 - Prob. 68PQCh. 22 - Prob. 69PQCh. 22 - Prob. 70PQCh. 22 - A system consisting of 10.0 g of water at a...Ch. 22 - Prob. 72PQCh. 22 - Figure P22.73 illustrates the cycle ABCA for a...Ch. 22 - Prob. 74PQCh. 22 - Prob. 75PQCh. 22 - Prob. 76PQCh. 22 - Prob. 77PQCh. 22 - Prob. 78PQCh. 22 - Prob. 79PQCh. 22 - Prob. 80PQCh. 22 - Prob. 81PQ
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
- (a) What is the available energy content, in joules, of a battery that operates a 2.00-W electric clock for 18 months? (b) How long can a battery that can supply 8.00104 J run a pocket calculator that consumes energy at the rate of 1.00103 ?arrow_forward(a) What is the average power consumption in watts of an appliance that uses 5.00 kW h of energy per day? (b) How many joules of energy does this appliance consume in a year?arrow_forwardYou place frozen soup (T = 17C) in a microwave oven for 3.5 min. The oven transfers 650 W to the soup. Model the soup as 0.35 kg of water (initially ice). What are the temperature and state of the soup when the oven stops?arrow_forward
- An engine has an electric generator that operates between 1870°C and 430°C. a. What is its maximum theoretical efficiency? b. Suppose that its actual efficiency is 42%. How much mechanical power does the engine deliver if it absorbs 140000 J of energy each second from the hot reservoir.arrow_forwardA certain coal-fired power plant has a rated power capacity of P = 1350 MW. The output of this plant is W = 0.34QH, where QH is the energy input as heat from the hot reservoir. Part (a) Write an equation for the efficiency of a heat engine in terms of QH and the heat QC exhausted to a low temperature reservoir. Part (b) Which would increase the efficiency more, doubling QH or reducing QC by half? Part (c) Calculate the maximum thermal efficiency of the power plant. Part (d) Calculate the absolute value of the exhausted heat (QC) each second in MJ for the power plant. Part (e) If the power plant operates for a full day at its rated capacity, how much energy QH in MJ is needed? Part (f) If, on average, one ton of coal contains Q = 25 GJ of energy, how many tons nH of coal would the plant need to operate for a day at its rated capacity? Part (g) How many tons nC of this coal is exhausted as wasted heat to QC in a single day?arrow_forwarda) Compute the electrical energy used by a household whose monthly electrical bill is $30, computed at the rate of $0.06 per kWh. (b) How long could this energy be used to burn ten 100 W light bulbs? (c) If this energy were used to raise a car of mass of 2000 kg, to what height would the car be raised?arrow_forward
- An electric light bulb rated at 100 W is left on for 10 days and nights. (a) How much energy was expended? (b) How long must an electric heater rated 3500 W be left on to expend the same amount of energy?arrow_forwardThe resistance of an exercise bike is often provided by a generator; that is, the energy that you expend is used to generate electric energy, which is then dissipated. Rather than dissipate the energy, it could be used for practical purposes.a. A typical person can maintain a steady energy expenditure of 400 W on a bicycle. Assuming a typical efficiency for the body, and a generator that is 80% efficient, what useful electric power could you produce with a bicycle-powered generator?b. How many people would need to ride bicycle generators simultaneously to power a 400 W TV in the gym?arrow_forward(a) How long (in s) would it take a 1.00 ✕ 105 kg airplane with engines that produce of 100 MW of power to reach a speed of 300 m/s and an altitude of 12.0 km if air resistance were negligible? s (b) If it actually takes 875 s, what is the power applied, in megawatts? MW (c) Given this power, what is the average force (in kN) of air resistance if the airplane takes 1200 s? (Hint: You must find the distance the plane travels in 1200 s assuming constant acceleration.) kNarrow_forward
- the coefficient of performance of a room conditioner is 3.1 on a hot day and uses 950 W of electrical power.(a) how many joules of heat does the air conditioner remove from the room in one minute? (b)how many joules of heat does the air conditioner deliver to the hot outside air in one minute? (c) Explain why your answers to parts.arrow_forwardThe energy efficiency of electric vehicles is usually rated in terms of the kilowatt-hours (of energy) required to drive 100 miles, or kWh/100 mi. An electric car is rated at 38 kWh/100 mi. a. Is a vehicle rated 27 kWh/100 mi more or less efficient than this electric car? b. How much energy (in kilowatt-hours) is required to drive this electric car 260miles? c. Assuming electricity costs $0.14/kWh, how much does it cost to drive this electric car 350 miles?arrow_forwardC7 21.) If a hair dryer is rated at 1300 W, how much energy does it require in 6 minutes? ____________________________ Wharrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
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
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
University Physics Volume 1
Physics
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:OpenStax - Rice University
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Thermodynamics: Crash Course Physics #23; Author: Crash Course;https://www.youtube.com/watch?v=4i1MUWJoI0U;License: Standard YouTube License, CC-BY