Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 27, Problem 31SP
Compute the cost per hour at 8.0 / kW • h of electrically heating a room, if it requires 1.0 kg/h of anthracite coal having a heat of combustion of 8000 kcal/kg.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Why is it advisable to allow electric line to sag between poles?
Is it possible for a ship to use the internal energy of seawater to operate itsengine? Explain.
Why is the answer not approx 0.58 kWh as P = (0.2)(120) = 24 W = 0.024 kW
and if E = P*t then E = 0.024 kW * 24 h = 0.58 kWh? Is this not the correct answer? The solution above multiples 24 by 60? Why?
Verify the energy unit equivalence that 1 kW ⋅ h = 3.60×106 J .
Chapter 27 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 27 - 11. If the current supplied to a resistor is...Ch. 27 - 12. A 12.0-V battery supplies 20.0 mA to a...Ch. 27 - 13. A length of wire has a certain current...Ch. 27 - 14. A 12.0-V battery is put across a 100-Ω...Ch. 27 - 15. A 12.0-V car battery supplies 15.0 A to a...Ch. 27 - 16. A resistive heater is labeled 1600 W/120 V....Ch. 27 - Prob. 17SPCh. 27 - 18. A spark of artificial 10.0-MV lightning had...Ch. 27 - Prob. 19SPCh. 27 - 20. An electric motor takes 15.0 A at 110 V....
Ch. 27 - 21. A current of 10 A exists in a line of 0.15 Ω...Ch. 27 - Prob. 22SPCh. 27 - 23. A 25.0-W, 120-V bulb has a cold resistance...Ch. 27 - 24. While carrying a current of 400 A, a...Ch. 27 - 25. How much power does a 60-W/120-V...Ch. 27 - Prob. 26SPCh. 27 - 27. A 10.0-Ω electric heater operates on a 110-V...Ch. 27 - 28. An electric motor, which has 95 percent...Ch. 27 - 29. An electric crane uses 8.0 A at 150 V to...Ch. 27 - Prob. 30SPCh. 27 - 31. Compute the cost per hour at 8.0 / kW • h of...Ch. 27 - 32. Power is transmitted at 80 kV between two...Ch. 27 - 33. A storage battery, of emf 6.4 V and internal...Ch. 27 - 34. A tank containing 200 kg of water was used...
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
- With a 1200-W toaster, how much electrical energy is needed to make a slice of toast (cooking time = 1 minute)? At 9.0 cents/kW · h , how much does this cost?arrow_forwardHow much electrical energy is transferred to thermal energy in 2.00 hrs by an electricalresistance of 400 ohms when the potential applied across it is 90.0V?arrow_forwardThe people who live in suburbs use simultaneously: 2Hp aircon for 3 hrs. 900 watts toaster for 9 mins., a 1.50kW heater for 8 hrs., a 3.4kW broiler for 20 mins. a four 100 watts lamps for 5 hrs. If the total cost she has to pay is $2.50, What is the unit cost per Kw-hr?arrow_forward
- What is the useful energy output when a 60 W light bulb is on for 2 hours?Recall, traditional light bulbs are only 5% efficient.arrow_forwardA typical incandescent reading lamp runs at 60W. If it is lefton constantly, how much energy (J) is consumed per day,and what is the weekly cost if energy is charged at a rate of12.5 cents per kilowatthour?arrow_forwardHow long must a 100-W light bulb run in order to consume a million joules of electrical energy?arrow_forward
- Do correctly and asaparrow_forwardA. At 7.15 cents per kilowatt-hour, what does it cost to operate a 9.00 hp motor for 10.0 he? B. At 7.15 cents per kilowatt-hour, what does it cost to leave a 75.0 W light burning 24.0 hours a day?arrow_forwardTwo parallel plates, connected to a 45 volt power supply, are separated by an air gap. How small can the gap be if the air is not to become conducting by exceeding its breaking value of E=3x10^6 V/Marrow_forward
- Check Your Understanding Verify that /V and e0/d have the same physical units.arrow_forwardA large household air conditioner may consume 15.0 kW of power. What is the cost of operating this air conditioner 3.00 h per day for 30.0 d if the cost of electricity is $0.110 per kW h?arrow_forwardSuppose a heart defibrillator consumes 425 j of energy in 10.5 ms. What is the average power output of the defibrillator, in W? arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Ohm's law Explained; Author: ALL ABOUT ELECTRONICS;https://www.youtube.com/watch?v=PV8CMZZKrB4;License: Standard YouTube License, CC-BY