The tungsten filament of a certain 100 W lightbulb radiates 2.00 W of light (electro- magnetic radiation). The other 98 W is carried away by convection and conduction. The filament has a surface area of 0.250 mm² and an emissivity (albedo) of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K.)

Q: b)A spherical infrared heater of radius 5.15 cm has an emissivity of 0.75. What temperature must it…

A: Spherical Infrared heater Radius, R = 5.15 cm = 0.0515 m e = 0.75

Q: A naked person whose body has a surface area of 1.40 m2 with an emissivity of 0.85 has a skin…

A: Given,  Surface Area, A = 1.40 m2 Emissivity, e =  0.85  Skin temperature, T = 37°C = 310 K  Room…

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Q: A person eats a dessert that contains 280 Calories. (This "Calorie" unit, with a capital C, is the…

A: Given , skin temperature T1= 360C = 36+273 = 309 K Ambient temperature T2 = 240C = 24+273 = 297 K…

Q: An incandescent light bulb has a tungsten filament that is heated to a temperature of 3.20 × 103 K…

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Q: As shown below, an insulated gold wire is immersed in 466 g of water at 22 °C. The wire is 4.9 cm…

A: The mass of the water is given as, m=466 g (or) m=0.466 kg. The initial temperature of the water is…

Q: A person of surface area 1.80 m2 is lying  in the sunlight to get a tan. If the intensity of the…

A: The objective of the question is to find out the rate at which heat must be lost by the person in…

Q: Consider a 280-m2 black roof on a night when the roof’s temperature is 30.5°C and the surrounding…

A: Given data, Area A=280 m2 Roof temperature Tr=30.5 °C=303.5 K Surrounding temperature Ts=14.5…

Q: The temperature of the filament of 100 watt electric lamp is 2727°C. Calculate its emissivity if the…

A: To find- Emissivity of filament (e)=? Given that- Power of electric lamp=dQdt=100 watt Temperature…

Q: A gold filament of length L = 12 cm when its temperature is 20° C is heated up to a temperature of…

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Q: If a blackbody is radiating at T=1330 K at what wavelength is the maximum intensity?

A: According to Wien's displacement law the black body radiation curve for different temperatures peaks…

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Q: The operating temperature of a tungsten filament in an incandescent light bulb is 2500 KK, and its…

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Q: Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times…

A: Luminosity of the sun is 3.916×1026 WBetelguese has a luminosity, 100000×3.916×1026=3.916×1031 W The…

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Q: A student is trying to decide what to wear.His bedroom is at 20.0 degrees Celcius.His skin…

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Q: A ceramic mug is at a temperature of 343 K (about 160°F). The mug has a surface area of about 0.03…

A: Given data The temperature of the ceramic mug is Tc = 343 K. The surface area of the mug is A =…

Q: An incandescent light bulb has a tungsten filament that is heated to a temperature of 3.20 × 103 K…

A:

Q: An incandescent light bulb has a tungsten filament that is heated to a temperature of 3.00 x103 K…

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Q: Heat from the Sun is incident on a leaf that is horizontal to the radiation. The power per unit area…

A: (a) The relation of the power from the Sun absorbed by the leaf is Pl=radiant flux×area×75100…

Q: Light bulb 1 operates with a filament temperature of 2700 K, whereas light bulb 2 has a filament…

A: Given: The temperature of the filament of bulb 1 is 2700 K. The temperature of the filament of bulb…

Q: bulb (spherical in shape) has a surface temperature of 140deg C when the room air temperature is at…

A: Given50 W incandescent light bulb(spherical in shape)Surface temperature of bulb, T1=140…

Q: 2. A person steps out of the shower and dries off. The person's skin with an emissivity of 0.75 has…

A: Mathematically, the Stefan-Boltzmann Law can be given as, E = σe(T4 - To4) where E is the energy…

Q: Light bulb 1 operates with a filament temperature of 2900 K, whereas light bulb 2 has a filament…

A:

Q: A person is standing outdoors in the shade where the temperature is 20 °C. (a) What is the radiant…

A:

Q: At what net rate does heat radiate from a 275-m2 black roof on a night when the roof's temperature…

A: