The time-dependent pressure and flow rate are measured downstream of an artificial heart valve situated within an experimental mock circulation of the human body. The signals are sampled at a rate of 160 Hz. The valve opens and closes with the heart rate at 75 beats per minute. Blocks of data are recorded at 128 samples per block. What is the frequency resolution of the sampled data? How many signal (heart beat) cycles are included in each block of 128 samples?

The inner surface of a 0.25m thick brick wall of a furnace is kept at 810ºc, when the outside surrounding air is at 22ºc. the convective heat transfer coefficient of the outer surface is 12 w/m2k and the thermal conductivity of the brick is 0.865 w/mk.neglect the convective resistance for the inner side of the furnace and assume that the problem is steady state and thermal radiation is neglected. (a)-sketch the system and calculate the rate of heat loss per unit wall area. (b)-calculate the temperature of the outer wall surface.