Aplane wall 6.0 cm thick generates heat internally at the rate of 300,000 w/m3 . one side of the wall is insulated and the other side is exposed to air at 93°c. the convective heat transfer coefficient between the surface of the wall and the air is 570 w/(m2 °c). the thermal conductivity of the wall is 21 w/(m °c). the system is at steady state. a. calculate the heat flux from the surface of the wall into the air. b. at what location in the wall will one find the maximum temperature?

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m