What is the value of the emissivity of the radiating cube

Reference no: EM13553431

Two cubes of equal total surface area (A = 0.04 m2) are at the same elevated temperature, 82 ºC, in a room at 21 ºC. Object #1 loses its heat by radiation to room temperature. Its emissivity is unknown. Object #2 loses its heat by conduction to room temperature through a container of thickness 0.019 m and thermal conductivity k=0.084 W/(mºC) (the area of the container is equal to the area of the cube). Both cubes are losing heat at the same rate at this elevated temperature. What is the value of the emissivity of the radiating cube?

Reference no: EM13553431

Questions Cloud

What is the stocks required return : The rest-free rate is 5%, the required market return is 10%, the risk premium for small stocks (rSMB) is 3.2%, and the risk premium for value stocks (rHML) is 4.8%. If ai = 0, bi = 1.2, ci = - 0.4, and di = 1.3, what is the stock's required return..

Explain electron moves from the first to the third shell : One in which an electron moves from the second shell to the third shell or an otherwise identical atom in which an electron moves from the first to the third shell

Compute the number of bonds held : Assuming that the bonds are trading at par and the interest rate remains constant throughout the period to maturity, compute the number of bonds held during each consecutive year of the investment.

Find the magnitude and sign of the charges : A square with sides of length L has a point charge at each of its four corners. Two corners that are diagonally opposite have charges equal to +2.11 µC; the other two diagonal corners have charges Q. Find the magnitude and sign of the charges Q such ..

What is the value of the emissivity of the radiating cube : Two cubes of equal total surface area (A = 0.04 m2) are at the same elevated temperature, 82 ºC, in a room at 21 ºC. What is the value of the emissivity of the radiating cube

Find the positions of all the antinodes on the string : A string of length 1.20 m is vibrating in the 3rd harmonic at a frequency of 93 Hz. What are the positions of all the antinodes on the string

Prepare the debit-credit analysis for each transaction. : Presented below is information related to Aromashodu Real Estate Agency. Oct. 1 Devin Aromashodu begins business as a real estate agent with a cash investment of $15,000.

Explain a standard reference material is certified : A Standard Reference Material is certified to contain 94.6 ppm of an organic contaminant in soil. Your analysis gives values of 98.6, 98.4, 97.2, 94.6, and 96.2 ppm.

What is the pressure in the small pipe at the bottom : A water pipe at the top of a hill has a cross sectional area of 0.052 m2 and carries a flow rate of 0.75 m3/s. The pressure in this pipe is 1.8 x 105 N/m2. What is the pressure in the small pipe at the bottom

User Account

All Pages