An enclosure has an inside area of 50 m², and its inside surface is black and is maintained at a constant temperature. A small opening in the enclosure has an area of 0.01 m². The radiant power emitted from this opening is 52 W. What is the temperature of the interior enclosure wall, in K? If the interior surface is maintained at this temperature, but is now polished so that its emissivity is 0.15, what will be the value of the radiant power emitted from the opening, in W?

An enclosure has an inside area of 50 m², and its inside surface is black and is maintained at a constant temperature. A small opening in the enclosure has an area of 0.01 m². The radiant power emitted from this opening is 52 W. What is the temperature of the interior enclosure wall, in K? If the interior surface is maintained at this temperature, but is now polished so that its emissivity is 0.15, what will be the value of the radiant power emitted from the opening, in W?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Please kindly help. I will give a like. Thank you! a. Describe the S-curve model of diffusion on how does ‘rate of adoption’ change over time? At which-point is the rate of diffusion the fastest? b. S-curve model of diffusion: (true/false) and reasoning - k = 0, the rate of diffusion is instantaneous? - fixed k ≥ 0, the carrying capacity is determined only by the ratio of a and b? - fixed k ≥ 0, the rate of diffusion is determined only by the ratio of a and b? c. The diffusion of hybrid corn in the 1940s, who or which region seems to have adopted the hybrids more quickly and why?
Refer to Table 3.3 in the lecture and take the data for water and the five other liquids listed in the table. Plot the data in a graph with the thermal conductivity on the vertical axis and the temperature range from 0°C to 100°C on the horizontal axis. Use colors or different dashed lines to make the graph presentable and understandable. The graph should look like the graph in Figure 3.1 in the lecture. Provide a short explanation of the graph in three to five sentences.
Need neat and clean handwritten solution with step wise explaination and plagiarism free. Thanks.
You have smooth slabs of Titanium (Ti), polycrystalline silica (SiO2), and atactic PS. Rank them from highest to lowest: Thermal conductivity (k) Heat capacity (Cp) Energy band gap (Eg) Thermal expansion coefficient (a) Transparency Resistivity
Can you represent strain as a function of time using the Maxwell Viscoelastic Model.
Use the first image to solve two part question
3. a) With neat diagram, State the principle of RTD sensor b) A platinum resistance thermometer has a resistance of 100 ohm at 25°C. The Resistance temperature coefficient of platinum is 0.00392 ohm/ohm°C. (i) Find its resistance at 700C (ii) Let the thermometer has a resistance of 400 ohm, calculate the value of temperature.
Draw the cooling curve for steam cooling from 115C to -5 Label each phase (solid, liquid, gas), and each phase change (ie: vaporization, condensation, melt, freeze, sublimation, deposition, etc) on your graph. Reminder: Temperature is on your Y-axis and heat is on your X-axis.
Given the following: Cp of Br: 0.226 J/g-K BP of Br: 59 deg C density of Br: 3.12 g/mL Hvap of Br: 30,900 J/mol V of liquid Br solution: 50 mL Cp of Br2: 0.473 J/g-K What is the total heat required in heating Br from 25 to 75 deg C?
5. Figure shows the cooling curve for aNiO-MgO ceramic. (e) the super heat; 2800 2700 2600 2525 2500 28 2400 10 20 30 40 50 Time (min) Temperature (°C)
An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J). It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).
Explanations of the difference between thermal equilibrium and thermal steady-state. And give examples please