Physics
5th Edition
ISBN: 9781260486919
Author: GIAMBATTISTA
Publisher: MCG
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Chapter 14, Problem 77P
To determine
The surface area of the filament if the lamp delivers
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Students have asked these similar questions
The tungsten filament of a light bulb has an operating temperature of about 2100 K.If the emitting area of the filament is 1 cm2, and its emissivity (ε) is 0.68, what is the power output of the light bulb?
A plane brick wall (k = 0.7 W/m⋅K) is 10 cm thick. The thermal resistance of this wall per unit of wall area is
a.
0.524 m2⋅K/W
b.
0.250 m2⋅K/W
c.
0.327 m2⋅K/W
d.
0.143 m2⋅K/W
e.
0.448 m2⋅K/W
The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting area of the filament is 1.0 cm2, and its emissivity is 0.68, what is the power output of the light bulb? (s = 5.67×10-8 W/m2×K4)
A.
100 W
B.
75 W
C.
60 W
D.
None of the above
Chapter 14 Solutions
Physics
Ch. 14.1 - 14.1 On the Rebound
If a rubber ball of mass 1.0...Ch. 14.1 - Prob. 14.2PPCh. 14.2 - CHECKPOINT 14.2
Take a rubber band and stretch it...Ch. 14.2 - Prob. 14.3PPCh. 14.3 - Prob. 14.3CPCh. 14.3 - Prob. 14.4PPCh. 14.3 - Prob. 14.5PPCh. 14.4 - Prob. 14.6PPCh. 14.5 - Prob. 14.5CPCh. 14.5 - Prob. 14.7PP
Ch. 14.5 - Prob. 14.8PPCh. 14.5 - Prob. 14.9PPCh. 14.6 - Prob. 14.6CPCh. 14.6 - Prob. 14.10PPCh. 14.6 - Prob. 14.11PPCh. 14.8 - Prob. 14.12PPCh. 14.8 - Prob. 14.8CPCh. 14.8 - Prob. 14.13PPCh. 14.8 - Prob. 14.14PPCh. 14.8 - Prob. 14.15PPCh. 14 - Prob. 1CQCh. 14 - Prob. 2CQCh. 14 - 3. Why do lakes and rivers freeze first at their...Ch. 14 - Prob. 4CQCh. 14 - Prob. 5CQCh. 14 - Prob. 6CQCh. 14 - Prob. 7CQCh. 14 - Prob. 8CQCh. 14 - 9. What is the purpose of having fins on an...Ch. 14 - Prob. 10CQCh. 14 - Prob. 11CQCh. 14 - 12. Explain the theory behind the pressure cooker....Ch. 14 - Prob. 13CQCh. 14 - Prob. 14CQCh. 14 - Prob. 15CQCh. 14 - Prob. 16CQCh. 14 - Prob. 17CQCh. 14 - Prob. 18CQCh. 14 - Prob. 19CQCh. 14 - Prob. 20CQCh. 14 - Prob. 21CQCh. 14 - Prob. 22CQCh. 14 - Prob. 23CQCh. 14 - Prob. 24CQCh. 14 - Prob. 25CQCh. 14 - Prob. 26CQCh. 14 - 1. The main loss of heat from Earth is by
(a)...Ch. 14 - Prob. 2MCQCh. 14 - Prob. 3MCQCh. 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 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - Prob. 3PCh. 14 - Prob. 4PCh. 14 - Prob. 5PCh. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10PCh. 14 - Prob. 11PCh. 14 - Prob. 12PCh. 14 - Prob. 13PCh. 14 - Prob. 14PCh. 14 - Prob. 15PCh. 14 - Prob. 16PCh. 14 - Prob. 17PCh. 14 - Prob. 18PCh. 14 - Prob. 19PCh. 14 - Prob. 20PCh. 14 - Prob. 21PCh. 14 - Prob. 22PCh. 14 - Prob. 23PCh. 14 - Prob. 24PCh. 14 - Prob. 25PCh. 14 - Prob. 26PCh. 14 - Prob. 27PCh. 14 - Prob. 28PCh. 14 - Prob. 29PCh. 14 - Prob. 30PCh. 14 - Prob. 31PCh. 14 - Prob. 32PCh. 14 - Prob. 33PCh. 14 - Prob. 34PCh. 14 - Prob. 35PCh. 14 - Prob. 36PCh. 14 - Prob. 37PCh. 14 - Prob. 38PCh. 14 - Prob. 39PCh. 14 - Prob. 40PCh. 14 - Prob. 41PCh. 14 - Prob. 42PCh. 14 - Prob. 43PCh. 14 - Prob. 44PCh. 14 - 45. Is it possible to heat the aluminum of Problem...Ch. 14 - Prob. 46PCh. 14 - Prob. 47PCh. 14 - Prob. 48PCh. 14 - Prob. 49PCh. 14 - Prob. 50PCh. 14 - Prob. 51PCh. 14 - Prob. 53PCh. 14 - Prob. 52PCh. 14 - Prob. 54PCh. 14 - Prob. 55PCh. 14 - Prob. 56PCh. 14 - Prob. 57PCh. 14 - Prob. 58PCh. 14 - Prob. 59PCh. 14 - Prob. 60PCh. 14 - Prob. 61PCh. 14 - Prob. 62PCh. 14 - Prob. 63PCh. 14 - Prob. 64PCh. 14 - Prob. 65PCh. 14 - Prob. 66PCh. 14 - 67. One cross-country skier is wearing a down...Ch. 14 - Prob. 68PCh. 14 - Prob. 69PCh. 14 - Prob. 70PCh. 14 - Prob. 71PCh. 14 - Prob. 72PCh. 14 - Prob. 73PCh. 14 - Prob. 74PCh. 14 - Prob. 75PCh. 14 - Prob. 76PCh. 14 - Prob. 77PCh. 14 - Prob. 78PCh. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - Prob. 81PCh. 14 - Prob. 82PCh. 14 - Prob. 83PCh. 14 - Prob. 84PCh. 14 - Prob. 85PCh. 14 - Prob. 86PCh. 14 - Prob. 87PCh. 14 - Prob. 88PCh. 14 - Prob. 89PCh. 14 - Prob. 93PCh. 14 - Prob. 91PCh. 14 - Prob. 92PCh. 14 - Prob. 94PCh. 14 - Prob. 95PCh. 14 - Prob. 96PCh. 14 - Prob. 97PCh. 14 - Prob. 98PCh. 14 - Prob. 99PCh. 14 - Prob. 100PCh. 14 - Prob. 101PCh. 14 - Prob. 102PCh. 14 - Prob. 103PCh. 14 - Prob. 104PCh. 14 - Prob. 105PCh. 14 - Prob. 106PCh. 14 - Prob. 107PCh. 14 - Prob. 108PCh. 14 - Prob. 109PCh. 14 - Prob. 110PCh. 14 - Prob. 112PCh. 14 - Prob. 111PCh. 14 - 116. It requires 17.10 kJ to melt 1.00 × 102 g of...Ch. 14 - Prob. 113PCh. 14 - Prob. 90PCh. 14 - Prob. 115PCh. 14 - Prob. 116PCh. 14 - Prob. 117PCh. 14 - Prob. 118PCh. 14 - Prob. 119PCh. 14 - Prob. 120P
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- The surface area of an unclothed person is 1.50 m2, and his skin temperature is 33.0C. The person is located in a dark room with a temperature of 20.0C, and the emissivity of the skin is e = 0.95. (a) At what rate is energy radiated by the body? (b) What is the significance of the sign of your answer?arrow_forwardThe filament of a 75-W light bulb is at a temperature of 3300 K. Assuming the filament has an emissivity e = 1.0, find its surface area.arrow_forwardAn incandescent light bulb has a tungsten filament that is heated to a temperature of 3.20 × 103 K when an electric current passes through it. If the surface area of the filament is approximately 1.00 × 10−4 m2 and it has an emissivity of 0.360, what is the power radiated by the bulb?The Stefan–Boltzmann constant (σ) is 5.670 × 10−8 W/(m2·K4).arrow_forward
- A ceramic mug is at a temperature of 343 K (about 160°F). The mug has a surface area of about 0.03 m2 and ceramic has an emissivity of about 0.9. If the ambient temperature of the room is 293 K (about 70°F), what is the net rate at which energy is lost from the mug by radiation?arrow_forwardThe glowing filament in a lamp is radiating energy at a rate of 60 W. At the filament’s temperature of 1500°C, the emissivity is 0.23. What is the surface area of the filament?arrow_forwardLight bulb 1 operates with a filament temperature of 2700 K, whereas light bulb 2 has a filament temperature of 1700 K. Both filaments have the same emissivity, and both bulbs radiate the same power. Find the ratio A1/A2 of the filament areas of the bulbs.arrow_forward
- The tungsten filament of an incandescent light bulb has a temperature of approximately 3000 K. The emissivity of tungsten is approximately 1/3, and you may assume that it is independent of wavelength. If the bulb gives off a total of 100 watts, what is the surface area of its filament in square millimeters?arrow_forwardWhat is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22.0C. The person has a normal skin temperature of 33.0C and a surface area of 1.50 m2. The emissivity of skin is 0.97 in the infrared, where the radiation takes place.arrow_forwardA copper wire has a cross section of 2.5 mm^2 and a length of 2 meters. What is the electrical resistant at 20 degrees Celsius?arrow_forward
- An incandescent light bulb has a tungsten filament that is heated to a temperature of 3.00 x103 K when an electric current passes through it. If the surface area of the filament is approximately 1.00 x 10-4 m? and it has an emissivity of 0.370, what is the power radiated by the bulb?The Stefan-Boltzmann constant (0) is 5.670 x 10-8 W/(m 2. k4). Thank u!arrow_forwardAt room temperature (25∘C) a 5.000mm diameter tungsten pin is too large to fit into a 4.999mm diameter hole in a nickel bar. To what (common) temperature (∘C) must these two parts be heated so that the pin just barely fits into the hole?arrow_forwardThe thermal contact conductance at the interface of two 1-cm-thick copper plates is measured to be 18,000 W/m2·K. Determine the thickness of the copper plate whose thermal resistance is equal to the thermal resistance of the interface between the plates.arrow_forward
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