Consider the null-type wheatstone bridge. suppose r r 3 4 = ï± ï = ï± ï 100 2 , 200 2 , r 2 is variable calibrated resistor, and r 1 = ï± ï 100 1 is the transducer resistance. calculate the means and uncertainty of r 2 that is required to balance the bridge

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.

What is the main objective of using reheat rankine cycle?

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object