It is desired to deliver maximum power to a loudspeaker from an audio amplifier has an 8 Ohm output impedance. You have two speakers, one is 8 Ohm and another is 16 Ohm. Compare the difference in power delivered to the loudspeaker that provides maximum power to that which is not matched to the amplifier.

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2