Consider coaxial, parallel, black disks separated a distance of 0.20 m. the lower disk of diameter 0.40 m is maintained at 500 k and the surroundings are at 300 k. what temperature will the upper disk of diameter 0.20 m achieve if electrical power of 17.5 w is supplied to the heater on the back side of the disk?

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

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?

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.