College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 22, Problem 7CQ
Electric-power companies like to have their power factors as close to unity as possible. Why?
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6. Calculate the cost (in cents) of using a 200 watt television for 30 days if turned on 2 hours per
day and if electricity costs 10 cents per kilowatt-hour.
Key Idea Calculate cost in cents of using a 200W television.
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One 9-volt battery contains 19.7 thousand joules of energy. A 4-pack of 9-volt batteries cost $10.31 at Lowe's.
Estimate the cost of battery energy in dollars per kilowatt-hour. Energy conversions are available in Section 2.2 of the textbook.
Round your final answer to the nearest $10 per kilowatt-hour.
Suppose you use 60 kWh (kilowatt hours) of electricity at $0.31 per kWH, 96 kWh at $0.27 per kWh, and 87 kWH at $0.22 per kWh.
What is your total kHW of electricity used?
Chapter 22 Solutions
College Physics (10th Edition)
Ch. 22 - For a series ac R-L-C circuit, (a) why do the...Ch. 22 - Prob. 2CQCh. 22 - Prob. 3CQCh. 22 - At high frequencies, a capacitor becomes a short...Ch. 22 - Prob. 5CQCh. 22 - The current in an ac power line changes direction...Ch. 22 - Electric-power companies like to have their power...Ch. 22 - Prob. 8CQCh. 22 - When a series-resonant circuit is connected across...Ch. 22 - Is it possible for the power factor of an R-L-C ac...
Ch. 22 - During the last quarter of the 19th century, there...Ch. 22 - In an ac circuit, why is the average power...Ch. 22 - A piece of electrical equipment in an ac circuit...Ch. 22 - A light bulb is the resistance in a series R-L-C...Ch. 22 - A series R-L-C ac circuit with a sinusoidal...Ch. 22 - In a series R-L-C circuit powered by an ac...Ch. 22 - In a series R-L-C circuit powered by an ac...Ch. 22 - In a series R-L-C circuit powered by an ac...Ch. 22 - A series circuit contains an inductor, a resistor,...Ch. 22 - Prob. 8MCPCh. 22 - If the root-mean-square currant in an ac circuit...Ch. 22 - In a series R-L-C circuit, the voltage source...Ch. 22 - In an R-L-C ac series circuit, if the resistance...Ch. 22 - In a series R-L-C ac circuit at resonance, A. the...Ch. 22 - Prob. 1PCh. 22 - An electric motor is being powered with a voltage...Ch. 22 - A capacitance C and an inductance L are operated...Ch. 22 - the angular frequency in part (a), and what is the...Ch. 22 - Circuit design. You are designing an amplifier...Ch. 22 - A 2.20F capacitor is connected across an ac source...Ch. 22 - The voltage amplitude of an ac source is 25.0 V,...Ch. 22 - Find the current amplitude if the self-inductance...Ch. 22 - A sinusoidal ac voltage source in a circuit...Ch. 22 - A 65 resistor, an 8.0 F capacitor, and a 35 mH...Ch. 22 - In an R-L-C series circuit, the rms voltage across...Ch. 22 - A 1500 resistor is connected in series with a 350...Ch. 22 - (a) Compute the impedance of a series R-L-C...Ch. 22 - A 200 resistor is in series with a 0.100 H...Ch. 22 - A hair dryer is designed to produce 1200 W of...Ch. 22 - A series R-L-C circuit is connected to a 120 Hz ac...Ch. 22 - The circuit in Problem 13 carries an rms current...Ch. 22 - A series ac circuit contains a 250 resistor, a 15...Ch. 22 - An ac series R-L-C circuit contains a 120 w...Ch. 22 - (a) At what angular frequency will a 5.00 F...Ch. 22 - In an R-L-C series circuit, R = 150 , L = 0.750 H,...Ch. 22 - You need to make a series ac circuit having a...Ch. 22 - A series circuit consists of an ac source of...Ch. 22 - In a series R-L-C circuit, R = 400 , L = 0.350 H,...Ch. 22 - In a series R-L-C circuit, L = 0.200 H, C = 80.0...Ch. 22 - In an R-L-C series circuit, R = 300 , L = 0.400 H,...Ch. 22 - A solenoid has a resistance of 48.0 and an...Ch. 22 - A large electromagnetic coil is connected to a 120...Ch. 22 - A parallel-plate capacitor having square plates...Ch. 22 - At a frequency 1, the reactance of a certain...Ch. 22 - An electrical engineer is designing an R-L-C...Ch. 22 - Consider the circuit sketched in Figure 22.22. The...Ch. 22 - In a series R-L-C circuit, the components have the...Ch. 22 - (a) Show that for an R-L-C series circuit the...Ch. 22 - In an R-L-C series circuit, the magnitude of the...Ch. 22 - In a series R-L-C circuit, R = 300 , XC = 300 ,...Ch. 22 - In a series R-L-C circuit, the phase angle is...Ch. 22 - A 100.0 resistor, a 0.100 F capacitor, and a...Ch. 22 - Consider the same circuit as in the preceding...Ch. 22 - Converting dc to ac. An individual cell such as an...Ch. 22 - If the electrode oscillates between two points 20 ...Ch. 22 - Converting dc to ac. An individual cell such as an...Ch. 22 - Converting dc to ac. An individual cell such as an...
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- Why do we need to be careful about work done on the system versus work done by the system in calculations?arrow_forwardAt home I have a 350W motorized washing machine that I use to wash three times a week, 2 batches of clothes of 22 minutes each each time. Based on this problem, answer the following questions: a) How much energy in Joules do I "consume" in a year? (use 52 weeks for your calculation) b) based on the conditions of the previous question, what consumption would you have in kWh? c) How much do I pay, annually, in dollars, for the use of the washing machine, if the rate for energy from my electric company is 0.17443 / kWh?arrow_forwardThe cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is 8.8¢/kWh, and the clothesdryer is used for 700 hours in a year, what is the power rating of the clothes dryer? Explain clearly.arrow_forward
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