College Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780321879721
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Textbook Question
Chapter 26, Problem 20P
Your refrigerator uses 220 W when the compressor is running, and the compressor runs 30% of the time. How many kWh will your refrigerator use over the course of a year?
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A) How many kW of energy does a 650-W toaster use in the morning if it is in operation for a total of 7.0 min ? At a cost of 9.0 cents/kWh, estimate how much this would add to your monthly electric energy bill if you made toast four mornings per week (16 times per month).
Express your answer to two significant figures and include the appropriate units.
A typical cost for electric power is $ 0.135 per kilowatt-hour. (a) Some people leave their porch lights on all the time. What is the yearly cost to keep a 75-W bulb burning day and night? (b) Suppose a refrigerator uses 400W of power when it’s running, and it runs 8 hours a day. What is the yearly cost of operating that refrigerator?
A refrigerator using 1030 W runs two-thirds of the time. How much does the electricity cost to run the refrigerator each month (30 days) at 26¢ per kWh?
Chapter 26 Solutions
College Physics: A Strategic Approach (3rd Edition)
Ch. 26 - Identical resistors are connected to separate 12 V...Ch. 26 - Consider the three circuits in Figure Q26.2. Rank...Ch. 26 - Most battery-powered devices wont work if you put...Ch. 26 - If a lightbulb is connected to a 120 V, 60 Hz...Ch. 26 - A soldering gun contains a transformer that lowers...Ch. 26 - A 12 V DC power supply is connected to the primary...Ch. 26 - Figure Q26.7 shows three wires wrapped around an...Ch. 26 - Women usually have higher resistance of their arms...Ch. 26 - If you work out enough to visibly increase the...Ch. 26 - The peak current through a capacitor is 2.0 A....
Ch. 26 - Consider the four circuits in Figure Q26.14. Rank...Ch. 26 - Prob. 15CQCh. 26 - Prob. 16CQCh. 26 - Figure Q26.17 shows two inductors and the...Ch. 26 - The peak current passing through an inductor is...Ch. 26 - Consider the four circuits in Figure Q26.19. Rank...Ch. 26 - The tuning circuit in a radio uses an RLC circuit....Ch. 26 - The resonance frequency of a driven RLC circuit is...Ch. 26 - Consider the four circuits in Figure Q26.22. They...Ch. 26 - Prob. 23MCQCh. 26 - An inductor is connected to an AC generator. As...Ch. 26 - A capacitor is connected to an AC generator. As...Ch. 26 - An AC source is connected to a series combination...Ch. 26 - An AC source is connected to a series combination...Ch. 26 - The circuit shown in Figure Q26.28 has a resonance...Ch. 26 - At resonance, a driven RLC circuit has VC = 5.0 V,...Ch. 26 - A driven RLC circuit has VC = 5.0V, VR = 7.0 V,...Ch. 26 - A 200 resistor is connected to an AC source with...Ch. 26 - Figure P26.2 shows voltage and current graphs for...Ch. 26 - A resistor dissipates 2.00 W when the rms voltage...Ch. 26 - The heating element of a hair dryer dissipates...Ch. 26 - A toaster oven is rated at 1600 W for operation at...Ch. 26 - A small electric space heater uses a wire that has...Ch. 26 - A generator produces 40 MW of power and sends it...Ch. 26 - Soles of hoots that are designed to protect...Ch. 26 - The primary coil of a transformer is connected to...Ch. 26 - A soldering iron uses an electric current in a...Ch. 26 - A power pack charging a cell phone battery has an...Ch. 26 - A neon sign transformer has a 450 W AC output with...Ch. 26 - Prob. 13PCh. 26 - A science hobbyist has purchased a surplus...Ch. 26 - A generator produces 250 kW of electric power at...Ch. 26 - In an old house, the wires leading lo a 120 V...Ch. 26 - A typical American family uses 1000 kWh of...Ch. 26 - The wiring in the wall of your house to and from...Ch. 26 - The following appliances are connected to a single...Ch. 26 - Your refrigerator uses 220 W when the compressor...Ch. 26 - A 60 W (120 V) night light is turned on for an...Ch. 26 - Suppose you leave a 110 W television and two 100 W...Ch. 26 - The manufacturer of an electric table saw claims...Ch. 26 - John is changing a lightbulb in a lamp, Its a warm...Ch. 26 - In some countries AC outlets near bathtubs are...Ch. 26 - If you touch the terminal of a battery, the small...Ch. 26 - A person standing barefoot on the ground 20 m from...Ch. 26 - Electrodes used to make electrical measurements of...Ch. 26 - A fisherman has netted a torpedo ray. As he picks...Ch. 26 - Problems 30 and 31 concern a high-voltage...Ch. 26 - Problems 30 and 31 concern a high-voltage...Ch. 26 - A 0.30 F capacitor is connected across an AC...Ch. 26 - A 20 F capacitor is connected across an AC...Ch. 26 - The peak current through a capacitor is 10.0 mA....Ch. 26 - A 20 nF capacitor is connected across an AC...Ch. 26 - A capacitor is connected to a 15 kHz oscillator...Ch. 26 - The peak current through a capacitor is 8.0 mA...Ch. 26 - Prob. 38PCh. 26 - A 20 mH inductor is connected across an AC...Ch. 26 - The peak current through an inductor is 10.0 mA....Ch. 26 - A 500 H inductor is connected across an AC...Ch. 26 - An inductor is connected to a 15 kHz oscillator...Ch. 26 - The peak current through an inductor is 12.5 mA...Ch. 26 - A 2.0 mH inductor is connected in parallel with a...Ch. 26 - An FM radio station broadcasts at a frequency of...Ch. 26 - The inductor in the RLC tuning circuit of an AM...Ch. 26 - At what frequency f do a 1.0 F capacitor and a 1.0...Ch. 26 - What capacitor in series with a 100 resistor and...Ch. 26 - What inductor in series with a 100 resistor and a...Ch. 26 - A series RLC circuit has a 200 kHz resonance...Ch. 26 - An RLC circuit with a 10 F capacitor is connected...Ch. 26 - A series KLC circuit consists of a 280 resistor,...Ch. 26 - Electric outlets in England are 230 V. Alice...Ch. 26 - The voltage-to-current ratio in the primary coil...Ch. 26 - A 15-km-long, 230 kV aluminum transmission line...Ch. 26 - The voltage across a 60 F capacitor is described...Ch. 26 - Prob. 57GPCh. 26 - An electronics hobbyist is building a radio set to...Ch. 26 - For the circuit of Figure P26.59 a. What is the...Ch. 26 - For the circuit of Figure P26.60 a. What is the...Ch. 26 - An RLC circuit consists of a 48 resistor, a 200 F...Ch. 26 - Cell Membrane Resistance The capacitance of...Ch. 26 - Cell Membrane Resistance The capacitance of...Ch. 26 - Cell Membrane Resistance The capacitance of...Ch. 26 - Cell Membrane Resistance The capacitance of...Ch. 26 - Halogen Bulbs Halogen bulbs have some differences...Ch. 26 - Halogen Bulbs Halogen bulbs have some differences...Ch. 26 - Halogen Bulbs Halogen bulbs have some differences...Ch. 26 - Halogen Bulbs Halogen bulbs have some differences...
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- A house has 3 tubelights, 2 fans and a television. Each tubelight draws 40 W. The fan draws 80 W and the television draws 60 W. On an average, all the tubelights are kept on for five hours, two fans for 12 hours each and the television for five hours a day. Find the cost of electric energy used in 30 days at the rate of Rs. 3.00 per KWH.arrow_forwardHow long does it take a 60 W lightbulb to use 4000 Joules of Energy?arrow_forwardA 100-W driveway light bulb is on 10 hours per day. Assuming the power company charges 10 cents for each kilowatt-hour of electricity used, what is the annual cost to operate the bulb?arrow_forward
- An 11 W LED light bulb has an efficiency of 30 %. What amount of energy is wasted if the bulb is operated continuously for 1 minute?arrow_forwardA particular household uses a 1.9 kW heater 1.8 h/day ("on" time), four 100 W lightbulbs 6.0 h/day, a 2.8 kW electric stove element for a total of 1.0 h/day, and miscellaneous power amounting to 2.0 kWh/day Part A If electricity costs $0.105 per kWh, what will be their monthly bill (30 d)? Express your answer using two significant figures. Π| ΑΣΦ Cost = Submit Part B m = Submit Request Answer How much coal (which produces 7500 kcal/kg) must be burned by a 36 % -efficient power plant to provide the yearly needs of this household? Express your answer to two significant figures and include the appropriate units. O μà Value Units Previous Answers Request Answer ? ? $ per montharrow_forwardA light bulb uses up a power of 2.6 kW/hr. If the rate is Php153.42 per 1 kW/hr, and the light was on for 24 hours, a. How much kilowatt hour was consumed? b.How much was the bill after 24 hours?arrow_forward
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