Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Textbook Question
Chapter 6, Problem 9CQ
Explain why the electric utility company increases the voltage of electricity for long-distance transmission.
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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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- A 120.-V motor has mechanical power output of 2.50 hp. It is 90.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. (b) Find the energy delivered to the motor by electrical transmission in 3.00 h of operation. (c) If the electric company charges 0.110/kWh, what does it cost to run the motor for 3.00 h?arrow_forwardA 120-V immersion heater consists of a coil of wire that is placed in a cup to boil the water. The heater can boil one cup of 20.00°C water in 180.00 seconds. You buy one to use in your dorm room, but you are worried that you will overload the circuit and nip the 15.00-A, 120-V circuit breaker, which supplies your dorm room. In your dorm room, you have four 100.00-W incandescent lamps and a 1500.00-W space heater, (a) What is the power rating of the immersion heater? (b) Will it trip the breaker when everything is turned on? (c) If it you replace the incandescent bulbs with 18.00-W LED, will the breaker nip when everything is turned on?arrow_forwardIntegrated 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_forward
- Find the current through a person and identify the likely effect on her if she touches a 120-V AC source: (a) if she is standing on a rubber mat and offers a total resistance of 300 k; (b) if she is standing barefoot on wet grass and has a resistance of only 4000 k .arrow_forwardYou have been called in as an expert witness in a civil case. The case involves a dispute between neighbors. The plaintiff neighbor is complaining about a buzzing noise during the night that prevents the plaintiff from sleeping. He claims that the buzzing is coming from a light fixture on the defendants porch ceiling. The defendant likes to do installations and repairs himself and has done a sloppy job of installing the light fixture. The fixture hangs vertically from a single wire that is attached through the porch ceiling and down the wall to one connector in a nearby electrical outlet. The second wire is hung horizontally with strings at the level of the light and then runs down the wall to the other connector in the outlet. The defendant leaves the light on all night long for security. Recalling his high school physics, the plaintiff states that the combination of the 60-Hz household voltage and the magnetic field of the Earth results in an oscillating driving force on the single wire from which the light fixture hangs vertically. This, in turn, sets up a standing wave in the wire, and that is the cause of the buzz. You have been hired by the defense attorney. Upon hearing the details of the case, you obtain permission from the defendant and make measurements. The mass of the light fixture is 17.5 kg. The vertical wire from which it hangs is 0.150 m long and has a mass of 0.030 kg. Is the plaintiff correct that the magnetic field of the Earth is causing the buzzing of the wire? Ignore any effect of the second wire.arrow_forwardIntegrated Concepts (a) An immersion heater utilizing 120 V can raise the temperature of a 1.00 102 -g aluminum cup containing 350 g of water from 20.0°C to 95.0°C in 2.00 min. Find its resistance, assuming it is constant during the process. (b) A lower resistance would shorten the heating time. Discuss the practical limits to speeding the heating by lowering the resistance.arrow_forward
- In a hydroelectric installation, a turbine delivers 1500 hp to a generator, which in turn transfers 80.0% of the mechanical energy out by electrical transmission. Under these conditions, what current does the generator deliver at a terminal potential difference of 2000 V?arrow_forwardUnreasonable Results (a) What current is needed to transmit 1.00 102MW of power at 480 V? (b) What power is dissipated by the transmission lines if they have a 1.00 -resistance? (c) What is unreasonable about this result? (d) Which assumptions are unreasonable, or which premises are inconsistent?arrow_forwardSI. A physics student has a single-occupancy dorm loom. The student lias a small refrigerator that runs with a current of 3.00 A and a voltage of 110 V, a lamp that contains a 100-YV bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 3.00 W. (a) Assuming the power plant that supplies 110 V electricity to the dorm is 10 km away and the two aluminum transmission cables use 0-gauge wire with a diameter of 8.252 mm, estimate the percentage of the total power supplied by the power company that is lost in the transmission, (b) What would be the result is the power company delivered the electric power at 110 kV?arrow_forward
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