The filament of an incandescent lamp has an area of 50 mm2 and operates at a temperature of 2,127 ◦C. Assume that all the energy supplied to the bulb is radiated by it. If the emissivity of the filament is 0.83, how much power must be supplied to the bulb when it is in operation

The filament of an incandescent lamp has an area of 50 mm2 and operates at a temperature of 2,127 ◦C. Assume that all the energy supplied to the bulb is radiated by it. If the emissivity of the filament is 0.83, how much power must be supplied to the bulb when it is in operation

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A 900 g copper rod at 20 degrees celcius has a length of 1.0000 m. The thermal expansion coefficient of copper is 17 x 10^-6 degrees celcius -1. The specific heat capacity is 0.385 kJ/kg degrees celcius. Question A: The copper is heated to 400 degrees celcius. What is the new length? Give the answer in meters and with 4 digits of precision after the decimal. Question B: The hot copper is then quenched by dunking the entire rod in a bucket with 10 kg of water at 20 degrees celcius. The specific heat capaciy of water is 4.18 kJ/kg degrees celcius. If none of the water turns to steam what is the equilibrium temp of the copper rod and water? Please give the answer in degrees celcius Question C: You measure the equilbrium temp and find that it is 24 degrees celcius. If the latent heat of vaporization of water is 2,260 kJ/kg, what mass of water turned to steam? Answer in grams
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Presents the diagram of the problem, necessary formulas, clearance and numerical solution: On June 26, the US Brookhaven National Laboratory (BNL) announced that the Guinness World Records (GWR) organization had granted him the temperature record highest ever achieved: gold ion collisions at nearly the speed of light at the accelerator of Relativistic Heavy Ion Collider particles had formed a plasma at 4 billion degrees Celsius. Convert this value to ◦C and K.
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.)
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What is the correct number of significant figures for a final answer that uses all of the following given information: 5 solar farms each have an installed capacity of 4.50 MW, an average solar-to-electric efficiency of 17%, and are in a location with an annual average solar radiation of 6.024 kWh/m^2/day (the same as Berkeley, CA)?
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The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm and a radius of about 700,000 km. Your dark-adapted eye has a pupil diameter of about 7 mm and can detect light intensity down to about 1.5 x 10-11 W/m². Assume the emissivity of the Sun is equal to 1. First, given these numbers, what is the surface temperature of the Sun in Kelvin to 3 significant digits? 5,796
Question 1. The table below shows a collection of data for a thermocouple. Temperature is in degrees Celsius, and the Voltage is in millivolts. (a) Plot the graph using rectangular graph paper with Temperature as the independent variable and determine the basic functional relationship between Temperature and Voltage. Alternatively, you can use Microsoft Excel to plot the data, but attach the graph in your answer page. (b) Determine specific the equation, using the method of selected points that best fits the data. Show how you determined the equation. If you need help, review Lecture-5 (c) What is the thermocouple voltage when the temperature is 1225 degree Celsius? Temperature (degree Celsius) Voltage (millivolts) 50 100 150 200 300 400 500 600 700 800 900 1000 2.5 6.7 8.8 11.2 17 22.5 26 32.5 37.7 41 48 55.2
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