A body whose surface area is 0.65 m2 and the temperature is 175ºC is placed in a large chamber whose walls are at 25ºC. If the emissivity is 0.75, determine the rate of heat transfer by radiation between the body and the surroundings in W.

Consider a unidirectional composite lamina where the fibers are aligned at 60° from the x-axis as shown in the figure. If the thickness of the composite lamina is small compared to the in- plane dimensions, it is appropriate to assume that a state of plane stress exists in the lamina. The stress components at point a in the x- y coordinate system are shown in the figure. Determine the principal stresses and principal planes at point a, and indicate on a sketch the orientation of the principal planes which respect to the principal material directions. 20 MPа YA 10 MPa 50 MPa

The 12ft x 14 foot room illustration in figure 1.6a has an exterior wall at a surface temperature of 60°F, a window surface temperature of 40°F (double glazing on a cold day). The two interior wall surfaces are a temperature of 72°F. Determine the MRT sensation of a person standing in the center of the room. (See figure 1.6 below) Round your values to the nearsest hundreth decimal place (0.00).  You will need to upload your mathematical work in question 4.

A 3x3m plate at 500 degC is suspended vertically in a very large room. The plate has an emissivity of 0.13, The room is at 25degC. What is the net heat transfer from the plate?

A 3-meter high room is heated through a vertical steam pipe. If the bulk temperature of steam in the room was 25 degrees Celsius when the steam in the pipe is 98 degrees Celsius. Determine the minimum dimension of the pipe that could generate a power of 725 Watts if the pipe is (a) square and (b) circular.

Two parallel plates are sustained at 1073.15K and 573.15K which has emissivityof 0.3 and 0.5 respectively. If a polished shield made from aluminum with Є =0.05 is placed between the two parallel plates, determine the following:a) Net radiant heat exchange per square meter of the two parallel plates beforethe aluminum plate was placed between both plates b) Percentage reduction of heat transfer after the aluminum was place betweenthe plates

We are walking outside in a very hot summer day. The climate is such that the wind velocity is zero m/sec. Determine the modes of heat transfer         Conduction only       Radiation only       Conduction and radiation       Convection only       Conduction and convection       None of the given

Choose the correct answer only as soon as possible please

Explain why an absolute temperature is defined and give its SI units.

Required information Consider a person whose exposed surface area is 21 m4, emissivity is 0.5, and surface temperature is 32°C. Given: 0 = 5.67×10-8 W/m2.K4 Determine the rate of heat loss from that person by radiation in a large room having walls at a temperature of 300 K (upto 3 decimal places). You must provide an answer before moving to the next part. The rate of heat loss from the person at 300K is W.