PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
6th Edition
ISBN: 9781429206099
Author: Tipler
Publisher: MAC HIGHER
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Chapter 20, Problem 56P
To determine
To Estimate: The thermal resistance of the rod.
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For the heat resistance of a material, it must be made in a certain thickness. In other words, as the
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1.5. The resistance of a platinum wire is found to be 11.000 SN at the ice point, 15.247 N at
the steam point, and 28.887 N at the sulfur point. Find the constants a and b in the
equation
R' = R(1+ a@ + be²),
and plot R' against Celsius temperature 0 in the range from 0 to 660°C.
The filament in a light bulb has a diameter of 0.02 mm and an emissivity of 1.0.
The temperature of the filament is 3×1000°C. What should be the length of the
filament in meters so it will radiate 60 W of power? The Stefan-Boltzmann
constant is 5.670 × 10-8 W/m2 · K4. Please give your answer with 3 decimal
places.
Chapter 20 Solutions
PHYSICS F/SCI.+ENGRS.,STAND.-W/ACCESS
Ch. 20 - Prob. 1PCh. 20 - Prob. 2PCh. 20 - Prob. 3PCh. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10P
Ch. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Prob. 13PCh. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - Prob. 19PCh. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27PCh. 20 - Prob. 28PCh. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Prob. 32PCh. 20 - Prob. 33PCh. 20 - Prob. 34PCh. 20 - Prob. 35PCh. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - Prob. 40PCh. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Prob. 43PCh. 20 - Prob. 44PCh. 20 - Prob. 45PCh. 20 - Prob. 46PCh. 20 - Prob. 47PCh. 20 - Prob. 48PCh. 20 - Prob. 49PCh. 20 - Prob. 50PCh. 20 - Prob. 51PCh. 20 - Prob. 52PCh. 20 - Prob. 53PCh. 20 - Prob. 54PCh. 20 - Prob. 55PCh. 20 - Prob. 56PCh. 20 - Prob. 57PCh. 20 - Prob. 59P
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- The resistance of the tungsten filament of an incandescent light bulb at 22 degC is 34 Ohms. If the light bulb is connected to a voltage of 126 V a current of 0.36 A flows through the filament. What will be the temperature of the light bulb filament under working conditions? The temperature coefficient of resistance of tungsten is 4.6E-3 1/degC. Your answer must be in degC, other scales are not accepted.arrow_forwardDiameter of a Solid conductor wire is 2.54 cm and the thickness of the insulation is 3 mm. When the current is flowing, the rate of heat dissipation from the wire is 417 W per unit length of wire. If the outer surface temperature of the insulation is 28 °C, Calculate the inner surface temperature of the insulation. Take the thermal conductivity of the insulation material as 0.44 W/m K.arrow_forward1.5. The resistance of a platinum wire is found to be 11.000 N at the ice point, 15.247 N at the steam point, and 28.887 N at the sulfur point. Find the constants a and b in the equation e Fa ation R' = R(1+ a0 + b0²), and plot R' against Celsius temperature 0 in the range from 0 to 660°C. 16 When the ice point i and the steam point s were chosen as fixed points with 100arrow_forward
- Show that the thermal resistance of a rectangular enclosure can be expressed as R = Lc /(Ak Nu), where k is the thermal conductivity of the fluid in the enclosure.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_forwardThe 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?arrow_forward
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