Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 14, Problem 22Q
A premature baby in an incubator can be dangerously cooled even when the air temperature in the incubator is warm. Explain
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5. A potential divider circuit is made by stretching a 1 m long wire with a resistance of 0.1 per cm
from A to B as shown.
8V
A
100cm
B
sliding contact
5Ω
A varying PD is achieved across the 5 Q resistor by moving the slider along the resistance wire.
Calculate the distance from A when the PD across the 5 Q resistor is 6 V.
4. A voltmeter with resistance 10 kQ is used to measure the pd across the 1 kQ resistor in the circuit
below.
6V
5ΚΩ
1ΚΩ
V
Calculate the percentage difference between the value with and without the voltmeter.
1.
A 9V battery with internal resistance 5 2 is connected to a 100 2 resistor. Calculate:
a. the Power dissipated in the 100 2 resistor
b. The heat generated per second inside the battery.
C.
The rate of converting chemical to electrical energy by the battery.
2. A 230 V kettle is rated at 1800 W. Calculate the resistance of the heating element.
Chapter 14 Solutions
Physics: Principles with Applications
Ch. 14 - Prob. 1OQCh. 14 - Prob. 1QCh. 14 - Prob. 2QCh. 14 - (a) If two objects of different temperatures are...Ch. 14 - In warm regions where tropical plants grow but the...Ch. 14 - Prob. 5QCh. 14 - Prob. 6QCh. 14 - Prob. 7QCh. 14 - Prob. 8QCh. 14 - Prob. 9Q
Ch. 14 - Prob. 10QCh. 14 - 11. Explorers on failed Arctic expeditions have...Ch. 14 - Prob. 12QCh. 14 - Prob. 13QCh. 14 - Prob. 14QCh. 14 - Prob. 15QCh. 14 - Prob. 16QCh. 14 - Prob. 17QCh. 14 - Prob. 18QCh. 14 - Prob. 19QCh. 14 - Prob. 20QCh. 14 - Prob. 21QCh. 14 - A premature baby in an incubator can be...Ch. 14 - Prob. 23QCh. 14 - Prob. 24QCh. 14 - Prob. 25QCh. 14 - 26. The Earth cools off at night much more quickly...Ch. 14 - Prob. 27QCh. 14 - Prob. 28QCh. 14 - Prob. 29QCh. 14 - Prob. 1MCQCh. 14 - Both beakers A and B in Fig. 14-15 [ contain a...Ch. 14 - 3. For objects at thermal equilibrium, which of...Ch. 14 - Prob. 4MCQCh. 14 - Prob. 5MCQCh. 14 - Prob. 6MCQCh. 14 - Prob. 7MCQCh. 14 - Prob. 8MCQCh. 14 - Prob. 9MCQCh. 14 - Prob. 10MCQCh. 14 - Prob. 11MCQCh. 14 - Prob. 12MCQCh. 14 - To what temperature will 8200 J of heat raise 3.0...Ch. 14 - How much heat (in joules) is required to raise the...Ch. 14 - Prob. 3PCh. 14 - An average active person consumes about 2500 Cal a...Ch. 14 - A British thermal unit (Btu) is a unit of heat in...Ch. 14 - How many joules and kilocalories are generated...Ch. 14 - A water heater can generate 32,000 kJ/h. How much...Ch. 14 - Prob. 8PCh. 14 - An automobile cooling system holds 18 L of water....Ch. 14 - What is the specific heat of a metal substance if...Ch. 14 - (a) How much energy is required to bring a 1.0-L...Ch. 14 - Prob. 12PCh. 14 - How long does it take a 750-W coffeepot to bring...Ch. 14 - 14. (II) What will be the equilibrium temperature...Ch. 14 - A 31.5-g glass thermometer reads 23.6°C before it...Ch. 14 - A 0.40-kg iron horseshoe, just forged and very hot...Ch. 14 - Prob. 17PCh. 14 - The heat capacity, C, ofan object is defined as...Ch. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Estimate the Calorie content of 65 g of candy from...Ch. 14 - Prob. 23PCh. 14 - If 3.40 x 105 J of energy is supplied to a...Ch. 14 - How much heat is needed to melt 23.50 kg of silver...Ch. 14 - Prob. 26PCh. 14 - What mass of steam at 100°C must be added to 1.00...Ch. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - Prob. 33PCh. 14 - A cube of ice is taken from the freezer at -8.5°C...Ch. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - Prob. 37PCh. 14 - Prob. 38PCh. 14 - 39. How long does it take the Sun to melt a block...Ch. 14 - Prob. 40PCh. 14 - Two rooms, each a cube 4.0 m per side, share a...Ch. 14 - Prob. 42PCh. 14 - Approximately how long should it take 8.2 kg of...Ch. 14 - Prob. 44PCh. 14 - Suppose the insulating qualities of the wall of a...Ch. 14 - Prob. 46GPCh. 14 - (a) Estimate the total power radiated into space...Ch. 14 - Prob. 48GPCh. 14 - Prob. 49GPCh. 14 - A mountain climber wears a goose-down jacket 3.5...Ch. 14 - Prob. 51GPCh. 14 - Prob. 52GPCh. 14 - Prob. 53GPCh. 14 - Prob. 54GPCh. 14 - Prob. 55GPCh. 14 - Prob. 56GPCh. 14 - Prob. 57GPCh. 14 - Prob. 58GPCh. 14 - Prob. 59GPCh. 14 - Prob. 60GPCh. 14 - Prob. 61GPCh. 14 - Prob. 62GPCh. 14 - Prob. 63GPCh. 14 - Prob. 64GPCh. 14 - A leaf of area 40 cm2and mass 4.5 x 10-4kg...Ch. 14 - Prob. 66GPCh. 14 - Prob. 67GPCh. 14 - Prob. 68GP
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