Consider a very long rectangular fin attached to a flat surface such that the temperature at the end of the fin is essentially that of the surrounding air, i. e. 20°c. its width is 5.0cm; thickness is 1.0mm; thermal conductivity is 200w/mk; and base temperature is 40°c. the heat transfer coefficient is 20w/m^2k. estimate the fin temperature at a distance of 5.0cm from the base and the rate of heat loss from the entire fin.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.