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- The 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.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?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.
- The 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?The tungsten filament of a certain 100 W light bulb radiates 3.00 W of light. (The other 97 W is carried away by convection and conduction.) The filament has surface area of 0.210 mm2 and an emissivity of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K.)The 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? Express your answer in meters squared. A = Submit Request Answer
- The filament of a light bulb has a temperature of 2580°C and radiates 60 W of power. The emissivity of the filament is 0.36. What is the surface area of the filament? o = 5.67x10-8 O 0.44 cm² 0.62 cm² O 0.74 cm² O 0.91 cm² O 0.144 cm² W m²K 4The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting area of the filament is 1.0 cm, and its emissivity is 0.68, what is the power output of the light bulb? (s = 5.67x10-8 W/m2xK4)Size of a Light-Bulb Filament. The operating temperature of a tungsten filament in an incandescent light bulb is 2450 K, and its emissivity is 0.350. Find the surface area of the filament of a 150 W bulb if all the electrical energy consumed by the bulb is radiated by the filament as electromagnetic waves.
- A classroom has dimensions 8.00 m x 10.00 m x 3.00 m. A 1000 W electric space heater is being used to warm the room from 5.00°C to 20.00°C on a cold morning. If the density of air is 1.29 kg/m°, and the specific heat capacity of air is 1004 J/(kg-K), how long will it take to heat the room? Assume no loss of thermal energy to the surroundings. A) 1.30 minutes B) 241 minutes C) 45.3 minutes O D) 77.7 minutesAn 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!Light 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.