Part 2: More Circuits in Multisim 1. Create the circuit in Multisim. Choose a red LED. Notice the rating of the LED. a) What is the voltage rating of the LED? At what current? b) Size the resistor such that when using a 5V source the LED has the appropriate level of current flow through it. Hint: Use a KVL to start your analysis. What size is your resistor? Include a screenshot of your circuit.

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.