College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 19, Problem 72GP
& EST Electric water heater An electric hot water heater has a 7000-W resistive heating element. (a) Determine the energy needed to warm the 120 kg of water in the heater from
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A small vegetable shop use the following electric appliances:
(i) Two Air Conditioner of rating 2200 W for ten hours each day
(ii) Two Electric Freezer of rating 1400W each for 24 hours each day
(iii) Ten electric tube lights of rating 35W each for 12 hours each day. Calculate the
electricity bill of the vegetable shop for the month of November 2020 if the cost per unit
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of electric energy is 10 Bz/ kWh.
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A stationery shop use the following electric appliances:
(i) Four Air Conditioner of rating 1800 W for twelve hours each day
(ii) Two Electric Freezer of rating 1000W each for 24 hours each day
(iii) Ten electric tube lights of rating 20W each for 12 hours each day. Calculate the electricity bill of the
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out of
stationery shop for the month of November 2020 if the cost per unit of electric energy is 25 Bz/ kWh.
question
(1) Electrical Energy(in kWh) consumed by Air conditioners of rating 1800 W for 12 h of each day=
(ii) Electrical Energy(in kWh) consumed by Electric Freezer of rating 1000 W for 24 h of each day=
(iii) Electrical Energy(in kWh) consumed by Tube light of rating 20 W for 12 h of each day =
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Compare the energy consumption of two commonly used items in the household. Calculate the energy used by a 1.00 kW
toaster oven, W toaster, which is used for 5.80 minutes, and then calculate the amount of energy that an 11.0 W compact
fluorescent light (CFL) bulb, Wight, uses when left on for 10.50 hours.
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Wlight
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Chapter 19 Solutions
College Physics
Ch. 19 - Review Question 19.1 What condition(s) is/are...Ch. 19 - Review Question 19.2 Describe the changes in...Ch. 19 - Review Question 19.3 Explain the meaning of the...Ch. 19 - Review Question 19.4 Why does it make sense that...Ch. 19 - Review Question 19.5 What experimental evidence...Ch. 19 - Review Question 19.6 Eugenia says that the power...Ch. 19 - Review Question 19.7 Where is the electric...Ch. 19 - Review Question 19.8 Rank the four identical bulbs...Ch. 19 - Review Question 19.9 What does it mean when you...Ch. 19 - Review Question 19.10 Why does the resistance of a...
Ch. 19 - Two identical bulbs are connected on parallel...Ch. 19 - Compare the potential difference across bulbs 1...Ch. 19 - Two identical bulbs are in series as shown in...Ch. 19 - 4. Which statement below about the potential...Ch. 19 - Three circuits with identical bulbs and emf...Ch. 19 - 6. Rank in order the potential differences across...Ch. 19 - 7. Rank in order the five identical bulbs in the...Ch. 19 - Four identical bulbs are shown in the circuit in...Ch. 19 - Four identical bulbs are shown in the circuit in...Ch. 19 - Consider the circuit in Figure Q19.10. The switch...Ch. 19 - 11. Figure Q19.1 shows graphs for an incandescent...Ch. 19 - If an electric current were due to electrons...Ch. 19 - 13. Three light sources (a lightbulb, a blue LED ...Ch. 19 - What is the role of a battery in an electric...Ch. 19 - 16. Compare and contrast the physical quantities...Ch. 19 - Birds on high power lines Why can birds perch on a...Ch. 19 - 18. Preventing electric shock When a person is...Ch. 19 - (a) Using a voltmeter, how can you determine the...Ch. 19 - (a) What does it mean if the current through a...Ch. 19 - 21. Resistors become warm when there is an...Ch. 19 - At one time aluminum rather than copper wires were...Ch. 19 - 23. How do you connect an ammeter in a circuit to...Ch. 19 - Why do we connect electric devices in a home in...Ch. 19 - 26. Construct an electric circuit that is...Ch. 19 - 27. Most Christmas tree lights with incandescent...Ch. 19 - 28. Two students are arguing. Student A says that...Ch. 19 - Use the laws of energy and charge conservation to...Ch. 19 - When you close the switch in the circuit in Figure...Ch. 19 - 1. A bulb in a table lamp has a current of 0.50 A...Ch. 19 - A long wire is connected to the terminals of a...Ch. 19 - A typical flashlight battery will produce a 0.50-A...Ch. 19 - 4. * Four friends each have a battery, a bulb, and...Ch. 19 - 5. Draw a circuit that has a battery, a lightbulb,...Ch. 19 - Add another battery to the circuit described in...Ch. 19 - Add another lightbulb to the circuit with one...Ch. 19 - A 9.0-V battery is connected to a resistor so that...Ch. 19 - 10. * A graph of the electric potential versus...Ch. 19 - 11. Sketch a potential-versus-location graph for...Ch. 19 - 12. Bio Electric currents in the body A person...Ch. 19 - 13. An automobile lightbulb has a 1.0-A current...Ch. 19 - * If a long wire is connected to the terminals of...Ch. 19 - Determine the current through a 2.5- resistor when...Ch. 19 - 16. * You have a circuit with a 50-Ω, a 100- Ω,...Ch. 19 - You have a circuit with a 50-, a 100- , and a 150-...Ch. 19 - 18. * A toy has two red LEDs (), two green LEDs...Ch. 19 - * You want to power a green LED (VOpenG=2.1V) and...Ch. 19 - 20. * A circuit consists of a green LED and a ...Ch. 19 - 21. * You connect a 50-Ω resistor to a 9-V battery...Ch. 19 - 22. * EST Making tea You use an electric teapot to...Ch. 19 - * If a long wire is connected to the terminals of...Ch. 19 - ** Three friends are arguing with each other. Adam...Ch. 19 - 25. * You have a 40-W lightbulb and a 100-W bulb....Ch. 19 - * Does a 60-W lightbulb have more or less...Ch. 19 - 27. * (a) Write two loop rule equations and one...Ch. 19 - 28. * (a) Write Kirchhoff's loop rule for the...Ch. 19 - 29. * Repeat parts (a) and (b) of the previous...Ch. 19 - * (a) Determine the value of 1 so that there is a...Ch. 19 - 31. ** The current through resistor in Figure...Ch. 19 - andR3 shown in Figure P19.27 satisfy the relation...Ch. 19 - 33. * (a) Write the loop rule for two different...Ch. 19 - 34. ** Determine the value of , shown in Figure...Ch. 19 - * Determine (a) the equivalent resistance of...Ch. 19 - 36. (a) Determine the equivalent resistance of...Ch. 19 - 37. * Determine the equivalent resistance of the...Ch. 19 - * Determine (a) the equivalent resistance of the...Ch. 19 - You close the switch in the circuit in Figure...Ch. 19 - * You close the switch in the circuit in Figure...Ch. 19 - 42. * Home wiring A simplified electrical circuit...Ch. 19 - 43. ** (a) Write Kirchhoff's rules for two loops...Ch. 19 - of internal resistance. Because each row has the...Ch. 19 - 45. Home wiring A 120-V electrical line m a home...Ch. 19 - * Tree lights Nine tree lights are connected m...Ch. 19 - 47. * Two lightbulbs use 30 W and 60 W,...Ch. 19 - * Three identical resistors, when connected in...Ch. 19 - . (a) Determine the power delivered to a resistor...Ch. 19 - * Determine the equivalent resistance of the...Ch. 19 - 51 toI4 from largest to smallest Assume all wires...Ch. 19 - Figure P19.52 shows a real circuit that consists...Ch. 19 - * A 100-m-long copper wire of radius 0.12 mm and...Ch. 19 - 54. * BMT subway rail resistance The BMT subway...Ch. 19 - * Thermometer A platinum resistance thermometer...Ch. 19 - As the potential difference in volts across a thin...Ch. 19 - 57. * BIO Respiration detector A respiration...Ch. 19 - * A wire whose resistance is R is stretched so...Ch. 19 - 59. * Ratio reasoning Determine the ratio of the...Ch. 19 - ** Electronics detective You need to determine the...Ch. 19 - 61. * A battery produces a 2.0-A current when...Ch. 19 - 62. * Resistance of human nerve cell Some human...Ch. 19 - 63. * Conductive textiles Metal strands can be...Ch. 19 - 64. * EST Figure P19.64 shows an I-versus-V graph...Ch. 19 - * EST Figure P19.64 shows an I-versus- V graph for...Ch. 19 - *EST Figure P19.64 shows an I-versus- V graph for...Ch. 19 - * Wiring high-fidelity speakers Your high-fidelity...Ch. 19 - 68 * BIO EST Lifting forearm by electric current...Ch. 19 - 69. * EST Switches You have a power supply, a 10-W...Ch. 19 - ** Wiring a staircase Devise an electric circuit...Ch. 19 - 72. ** EST Electric water heater An electric hot...Ch. 19 - 73. ** BIO EST The hands and arms as a conductor...Ch. 19 - 75. * A nickel wire of length L and a voltmeter...Ch. 19 - ** Solve the previous problem if the internal...Ch. 19 - * EST Figure P19.77 shows an | I | -versus-V graph...Ch. 19 - VI a. Connect a voltmeter to a batterys terminals....Ch. 19 - equaled the number of electrons passing a cross...Ch. 19 - 80. * A 5.0-A current caused by moving electrons...Ch. 19 - 81. ** BIO Current across membrane wall of axon An...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - BIO Signals in nerve cells stimulate muscles The...Ch. 19 - 86. The horizontal 4-Ω resistors in the two...Ch. 19 - 87. Suppose nerve impulses travel at 100 m/s in...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...Ch. 19 - BIO Effect of electric current on human body Nerve...
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