Arod having a diameter of 2 cm and a length of 10cm has one end maintained at 200°c and is exposed to a convection environment at 25°c with h = 40 w/m2 k. the rod generates heat internally at a rate of 50 mw/m3 and the thermal conductivity of the rod is k 35 w/m k. (a) derive the nodal equation for node 3, using symbols for h, k, ax, d and q (b) -substitute numerical values for each of the given quantities and obtain an expression for the unknown nodal tem- perature t3.

Describe the path of a ray that approaches a mirror parallel to the principal axis.

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

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?