A5-mm-thick stainless steel strip (k = 21 w/m•k, rho = 8000 kg/m3, and cp = 570 j/kg•k) is being heat treated as it moves through a furnace at a speed of 1 cm/s. the air temperature in the furnace is maintained at 1020°c with a convection heat transfer coefficient of 80 w/m2•k. if the furnace length is 3 m and the stainless steel strip enters it at 20°c, determine the temperature of the strip as it exits the furnace.

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.