A1200-ft equal tangent crest vertical curve is currently designed for 50 mph. a civil engineering student contends that 60 mph is safe in a van because of the higher driver’s eye height in the van. if all the design inputs are standard, what must be the height of driver’s eye (in the van) for the student’s claim to be valid?

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?