Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 6, Problem 6PEA
To determine
The rate at which the radio uses the electric energy.
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A battery of a computer has an emf of 12 Volts. The computer uses l=360mA while running.
If the computer runs out of battery in t=7.3 hours, what is the energy stored in the
battery?(answer will be answered in units of Wh....note: in order to transform Joule into Wh, which means
Watt hours, just divide the number obtained in Joule by 3600-s)
A 1500 W microwave oven runs off of a 240 V supply. The current drawn is by the microwave is 6.25Amps
a) If the electricity cost is $0.0925 per kWh, how much does it cost to run the microwave for 5 min?
The motor in a toy car is powered by four batteries in series, which produce a total emf of 6.00 V. The motor draws 3.00 A and develops a 4.50 V back emf at normal speed. Each battery has a 0.100 Ω internal resistance. What is the resistance of the motor?
Chapter 6 Solutions
Integrated Science
Ch. 6.1 - Prob. 1SCCh. 6.1 - Prob. 2SCCh. 6.1 - Prob. 3SCCh. 6.2 - Compared to a thick wire, a thin wire of the same...Ch. 6.3 - Prob. 5SCCh. 6.3 - Prob. 6SCCh. 6.3 - Prob. 7SCCh. 6.3 - Prob. 8SCCh. 6.4 - If you multiply amps volts, the answer will be in...Ch. 6.5 - Prob. 10SC
Ch. 6.5 - Prob. 11SCCh. 6.5 - Prob. 12SCCh. 6 - Explain why a balloon that has been rubbed might...Ch. 6 - Prob. 2CQCh. 6 - Why does a positively or negatively charged object...Ch. 6 - Prob. 4CQCh. 6 - Prob. 5CQCh. 6 - Prob. 6CQCh. 6 - Prob. 7CQCh. 6 - How is an unmagnetized piece of iron different...Ch. 6 - Explain why the electric utility company increases...Ch. 6 - Describe how an electric generator is able to...Ch. 6 - Prob. 11CQCh. 6 - Explain what causes an electron to move toward one...Ch. 6 - Explain how the model of electricity as electrons...Ch. 6 - What are the significant similarities and...Ch. 6 - Prob. 15CQCh. 6 - Prob. 16CQCh. 6 - Analyze the apparent contradiction in the...Ch. 6 - Prob. 18CQCh. 6 - Prob. 1PEACh. 6 - Prob. 2PEACh. 6 - Prob. 3PEACh. 6 - What is the current in a 60.0 resistor when the...Ch. 6 - Prob. 5PEACh. 6 - Prob. 6PEACh. 6 - Prob. 7PEACh. 6 - Prob. 8PEACh. 6 - Prob. 9PEACh. 6 - Prob. 10PEACh. 6 - A power plant generator produces a 1,200 V, 40 A...Ch. 6 - Prob. 12PEACh. 6 - Prob. 1PEBCh. 6 - Prob. 2PEBCh. 6 - Prob. 3PEBCh. 6 - Prob. 4PEBCh. 6 - Prob. 5PEBCh. 6 - A lightbulb designed to operate in a 120.0 V...Ch. 6 - What is the monthly energy cost of leaving a 60 W...Ch. 6 - An electric motor draws a current of 11.5 A in a...Ch. 6 - A swimming pool requiring a 2.0 hp motor to filter...Ch. 6 - Prob. 10PEBCh. 6 - Prob. 11PEBCh. 6 - Prob. 12PEB
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- Assume that global lightning on the Earth constitutes a constant current of 1.00 kA between the ground and an atmospheric layer at potential 300 kV. (a) Find the power of terrestrial lightning. (b) For comparison, find the power of sunlight falling on the Earth. Sunlight has an intensity of 1 370 W/m2 above the atmosphere. Sunlight falls perpendicularly on the circular projected area that the Earth presents to the Sun.arrow_forwardA small office-building air conditioner operates or 408-V AC and consumes 50.0 kW. (a) What is its effective resistance? (b) What is the cost of running the air conditioner during a hot summer month when it is on 8.00 h per day for 30 days and electricity costs 9.00 cenls/kW h ?arrow_forward(a) What is the resistance of a lightbulb that uses an average power of 75.0 W when connected to a 60.0-Hz power source having a maximum voltage of 170 V? (b) What If? What is the resistance of a 100-W lightbulb?arrow_forward
- Integrated Concepts (a) Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0-V batteries of a 750-kg electric car be able to supply: (a) To accelerate from rest to 25.0 m/s in 1.00 min? (b) To climb a 2.00 102-m- high hill in 2.00 min at a constant 25.0-m/s speed while exerting 5.00 102 N of force to overcome air resistance and friction? (c) To travel at a constant 25.0-m/s speed, exerting a 5.00 102 N force to overcome air resistance and friction? See Figure 20.44.arrow_forwardWhile taking a bath, a person touches the metal case of a radio. The path through the person to the drainpipe and ground has a resistance of 4000 Ω . What is the smallest voltage on the case of the radio that could cause ventricular fibrillation?arrow_forwardIn a household, a business is run for an average of 6 hours per day. The total power consumed by a computer and its printer is 220 watts. In addition, a 50-W light bulb runs during the same 6 hours. If their utility charges 11.75 cents per kWh, how much do the owners pay every 30-days? The amount paid by the owner is $arrow_forward
- Your home computer station uses 100 watts while idling. You decide to shut down your computer when you are sleeping. You turn the computer off at 11 p.m. and turn it back on again at 9 a.m. every day of the year. Your utility charges you 5.5 cents per kWh, how much will it cost you to run the computer for a year? How much money is saved by turning the computer off at night?arrow_forwardA capacitor charging circuit consists of a battery, an uncharged 20 μF capacitor, and a 5.6 kΩkΩ resistor. At t = 0 ss the switch is closed; 0.15 s later, the current is 0.46 mA . What is the battery's emf?arrow_forwardIn a household, a business is run for an average of 6 hours per day. The total power consumed by a computer and its printer is 205 watts. In addition, a 90-W light bulb runs during the same 6 hours. If their utility charges 11.75 cents per kWh, how much do the owners pay every 30-days?arrow_forward
- The big mall near Sally and Amy's city has extended their operating hours to accommodate the huge crowds expected for the After Thanksgiving Sale. In their eagerness to beat the crowd, Sally forgets to turn off the headlights when she gets out of the car at the mall parking lot. The headlights in her car require 37.0 W of power each, and her 12.0 V car battery is rated at 92.0 A · h. When the two friends come back to the car after a long and successful shopping spree, they find that the car refuses to start as the battery is now completely discharged. How long were they in the mall? Assume that they come out just as the battery dies. harrow_forwardWhat is the maximum power in W that can be generated from an 18 V emf using any combination of a 6.0 Q resistor, and 9.0 Q resistor?arrow_forwardThe following appliances are connected to a single 120 V, 15 A circuit in a kitchen: a 330 W blender, a 1000 W coffeepot, a 150 W coffee grinder, and a 750 W microwave oven. If these are all turned on at the same time, will they trip the circuit breaker?arrow_forward
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