Physics For Scientists And Engineers With Modern Physics, 9th Edition, The Ohio State University
9th Edition
ISBN: 9781305372337
Author: Raymond A. Serway | John W. Jewett
Publisher: Cengage Learning
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Chapter 27, Problem 38P
To determine
The power required to drive the belt.
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(a) A well-insulated electric water heater warms 111 kg of water from 20.0°C to 45.0°C in 23.0 min. Find the resistance (in 0) of its heating element, which is connected across a 240 V potential difference.
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(b) What If? How much additional time (in min) would it take the heater to raise the temperature of the water from 45.0°C to 100°C?
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(c) What would be the total amount of time (in min) required to evaporate all of the water in the heater starting from 20.0°C?
min
A cylindrical copper cable 1.50 km long is connected acrossa 220.0 V potential difference. What should be its diameter so thatit produces heat at a rate of 90.0 W?
Chapter 27 Solutions
Physics For Scientists And Engineers With Modern Physics, 9th Edition, The Ohio State University
Ch. 27.1 - Consider positive and negative charges of equal...Ch. 27.2 - Prob. 27.2QQCh. 27.2 - Prob. 27.3QQCh. 27.4 - When does an incandescent lightbulb carry more...Ch. 27.6 - Prob. 27.5QQCh. 27 - Prob. 1OQCh. 27 - Prob. 2OQCh. 27 - Prob. 3OQCh. 27 - Prob. 4OQCh. 27 - Prob. 5OQ
Ch. 27 - Prob. 6OQCh. 27 - Prob. 7OQCh. 27 - Prob. 8OQCh. 27 - Prob. 9OQCh. 27 - Prob. 10OQCh. 27 - Prob. 11OQCh. 27 - Prob. 12OQCh. 27 - Prob. 13OQCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 4CQCh. 27 - Prob. 5CQCh. 27 - Prob. 6CQCh. 27 - Prob. 7CQCh. 27 - Prob. 8CQCh. 27 - Prob. 1PCh. 27 - A small sphere that carries a charge q is whirled...Ch. 27 - Prob. 3PCh. 27 - Prob. 4PCh. 27 - Prob. 5PCh. 27 - Prob. 6PCh. 27 - Prob. 7PCh. 27 - Prob. 8PCh. 27 - The quantity of charge q (in coulombs) that has...Ch. 27 - Prob. 10PCh. 27 - Prob. 11PCh. 27 - Prob. 12PCh. 27 - Prob. 13PCh. 27 - Prob. 14PCh. 27 - A wire 50.0 m long and 2.00 mm in diameter is...Ch. 27 - A 0.900-V potential difference is maintained...Ch. 27 - Prob. 17PCh. 27 - Prob. 18PCh. 27 - Prob. 19PCh. 27 - Prob. 20PCh. 27 - Prob. 21PCh. 27 - Prob. 22PCh. 27 - Prob. 23PCh. 27 - Prob. 24PCh. 27 - Prob. 25PCh. 27 - Prob. 26PCh. 27 - Prob. 27PCh. 27 - While taking photographs in Death Valley on a day...Ch. 27 - Prob. 29PCh. 27 - Prob. 30PCh. 27 - Prob. 31PCh. 27 - Prob. 32PCh. 27 - Prob. 33PCh. 27 - Prob. 34PCh. 27 - At what temperature will aluminum have a...Ch. 27 - Assume that global lightning on the Earth...Ch. 27 - Prob. 37PCh. 27 - Prob. 38PCh. 27 - Prob. 39PCh. 27 - The potential difference across a resting neuron...Ch. 27 - Prob. 41PCh. 27 - Prob. 42PCh. 27 - Prob. 43PCh. 27 - Prob. 44PCh. 27 - Prob. 45PCh. 27 - Prob. 46PCh. 27 - Prob. 47PCh. 27 - Prob. 48PCh. 27 - Prob. 49PCh. 27 - Prob. 50PCh. 27 - Prob. 51PCh. 27 - Prob. 52PCh. 27 - Prob. 53PCh. 27 - Prob. 54PCh. 27 - Prob. 55PCh. 27 - Prob. 56PCh. 27 - Prob. 57APCh. 27 - Prob. 58APCh. 27 - Prob. 59APCh. 27 - Prob. 60APCh. 27 - Prob. 61APCh. 27 - Prob. 62APCh. 27 - Prob. 63APCh. 27 - Review. An office worker uses an immersion heater...Ch. 27 - Prob. 65APCh. 27 - Prob. 66APCh. 27 - Prob. 67APCh. 27 - Prob. 68APCh. 27 - Prob. 69APCh. 27 - Prob. 70APCh. 27 - Prob. 71APCh. 27 - Prob. 72APCh. 27 - Prob. 73APCh. 27 - Prob. 74APCh. 27 - Prob. 75APCh. 27 - Prob. 76APCh. 27 - Review. A parallel-plate capacitor consists of...Ch. 27 - The dielectric material between the plates of a...Ch. 27 - Prob. 79APCh. 27 - Prob. 80APCh. 27 - Prob. 81APCh. 27 - Prob. 82CPCh. 27 - Prob. 83CPCh. 27 - Material with uniform resistivity is formed into...Ch. 27 - Prob. 85CP
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- If the current carried by a conductor is doubled, what happens to (a) the charge carrier density, (b) the current density, (c) the electron drift velocity, and (d) the average time interval between collisions?arrow_forwardWhen an electric heater is turned on, the Nichrome heating element is at C and draws a current of 15 A, with a potential difference of 120 between the ends of the element. The element heats up to 847C, with the potential difference constant. Find the final current. (The temperature coefficient of resistivity of Nichrome is 4.0 * 10 ^ - 4 * (95) ^ - 1 )arrow_forwardA current is established in a gas discharge tube when a sufficiently high potential difference is applied across the two electrodes in the tube.The gas ionizes; electrons move toward the positive terminal and singly charged positive ions toward the negative terminal. (a) What is the current in a hydrogen discharge tube in which 3.1 *10^18 electrons and 1.1* 10^18 protons move past a crosssectional area of the tube each second? (b) Is the direction of the current density toward or away from the negative terminal?arrow_forward
- A rod of length /=5 m and a square cross sectional area with side length of 1.5 cm is made of material with resistivity p = 1.3x10-5 2.m. If a potential difference AV= 10.6 V is placed across the rod, find the power dissipated in it in the unit of Watt. AVarrow_forwardWith dry skin of the hands, the resistance between the palms of the hands can reach R1 Ohms). Find the current that will pass through the human body in contact with a U = 220 V power grid. Compare this current with the threshold values of tangible and non-releasing currents. 105 Ohms, and with wet hands this reşistance is much less (R2 = 103arrow_forwardSuppose you have a rod of pure silicon with a diameter of 2.79cm and a length of 20.6cm. These rods are often used in experiments, such as the Large Hadron Collider in France/Switzerland to detect high-energy particles, and they have a very high resistivity of 2300Ω⋅m. What current, in amperes, flows through the rod when a potential difference of 1.23* 10^3 V is applied between its ends ?arrow_forward
- A 220. V potential difference is applied to a space heater that dissipates 440. W during operation.(a) What is resistance during operation?(b) At what rate do electrons flow through any cross-section of the heater element? (c) The space heater has a resistance of 27.5 Ω at 25.0 °C and the temperature coefficient of resistivity is α = 4.50x10^-3 °C^-1. What is the temperature of the space heater internal elements?arrow_forwardA Van de Graaff generator is one of the original particle accelerators and can be used to accelerate charged particles like protons or electrons. You may have seen it used to make human hair stand on end or produce large sparks. One application of the Van de Graaff generator is to create X-rays by bombarding a hard metal target with the beam. Consider a beam of protons at 1.00 keV and a current of 5.00 mA produced by the generator. (a) What is the speed of the protons? (b) How many protons are produced each second?arrow_forwardAn electric car is designed to run on a bank of batteries with a total potential difference of 23 V and a total energy storage of 1.8×107 J. If the electric motor draws 7.0 kW, what is the current delivered to the motor? Answer in units of A. 012 (part 2 of 2) If the electric motor draws 7.0 kW as the car moves at a steady speed of 24.0 m/s, how far will the car travel before it is “out of juice"?arrow_forward
- An all-electric car (not a hybrid) is designed to run from a bank of 12.0 V batteries with total energy storage of 2.10 x 107 J. (a) If the electric motor draws 5.80 kW as the car moves at a steady speed of 20.0 m/s, what is the current (in A) delivered to the motor? A (b) How far (in km) can the car travel before it is "out of juice"? km (c) What If? The headlights of the car each have a 55.0 W halogen bulb. If the car is driven with both headlights on, how much less will its range be (in m)? marrow_forwardProblem: In the figure &₁ = 3.82 V, ₂ = 1.32 V, R₁ = 5.140, R₂ = 2.690, R3 = 3.610, and both batteries are ideal. What is the electric current in (a) R₁, (₁) (b) R₂. (1₂) and (c) R3, (13)? ww R₁ -18, ww R₂ Rs Efarrow_forwardAn all-electric car (not a hybrid) is designed to run from a bank of 12.0 V batteries with total energy storage of 1.90 x 107 J. (a) If the electric motor draws 8.20 kW as the car moves at a steady speed of 20.0 m/s, what is the current (in A) delivered to the motor? 683 A ✓ (b) How far (in km) can the car travel before it is "out of juice"? 46.34 ✓ km (c) What If? The headlights of the car each have a 65.0 W halogen bulb. If the car is driven with both headlights on, how much less will its range be (in m)? 740 Xmarrow_forward
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