General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 17, Problem 28E
To determine
The cost of toasting a slice of bread.
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Chapter 17 Solutions
General Physics, 2nd Edition
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- When operating on a 120-V circuit, an electric heater receives 1.30 103 W of power, a toaster receives 1.00 103 W, and an electric oven receives 1.54 103 W. If all three appliances are connected in parallel on a 120-V circuit and turned on, what is the total current drawn from an external source? (a) 24.0 A (b) 32.0 A (c) 40.0 A (d) 48.0 A (e) none of those answersarrow_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_forwardIntegrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a voltage of 1.00102 MV, and a length of 1.00 ms? (b) What mass of tree sap could be raised from 18.0°C to its boiling point and then evaporated by this energy, assuming sap has the same thermal characteristics as water?arrow_forward
- Two 100 WW (120 VV) lightbulbs are wired in series, then the combination is connected to a 120 VV supply. How much power is dissipated by each bulb? Express your answer in watts.arrow_forwardBefore leaving the house in the morning, you plop some stew in your slow cooker and turn it on Low. The slow cooker has a 160 Ohm resistor and is plugged into a 120 V outlet. When you come home 8 hours later, how much charge has passed through the slow cooker circuit in that time?arrow_forwardA light bulb has a resistance of 95 Ω when operating at 120 V. How much energy is given off by the light bulb after 1 day? 1.48 x 10^7 J 4.64 x 10^7 J 8.90 x 10^7 J 1.31 x 10^7 J 9.19 x 10^7 Jarrow_forward
- A 30 Ω toaster consumes 560 W of power; how much current is flowing through the toaster?arrow_forwardA 43 Ω component is connected to a 12 V battery. How much energy is expended per second?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
- Two 75 W (120 V) lightbulbs are wired in series, then the combination is connected to a 120 V supply. How much power is dissipated by each bulb?arrow_forwardFour identical filaments are connected together in series inside a decorative light bulb. Each filament has a resistance of 2.30 Ohms. When the very bright light is on, a current of 7.55 A passes through the bulb. What is the total power dissipated in Watts?arrow_forwardA 400-W computer (including the monitor) is turned on for 8.0 hours per day. If electricity costs 10¢ per kWh, how much does it cost to run the computer annually for a typical 365-day year? $1200 none of the given choices $15 $150 $120arrow_forward
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Ohm's law Explained; Author: ALL ABOUT ELECTRONICS;https://www.youtube.com/watch?v=PV8CMZZKrB4;License: Standard YouTube License, CC-BY