Aboulder starts from rest at the top of a hill. as is goes down the slope, gps coordinates are used to determine the displacement as a function of time given below, where x and t are expressed in ft and seconds, respectively. determine the position, velocity, and acceleration of the boarder when t=5 seconds.

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?