Water enters the 234 mm inside-diameter tubes of a boiler at 10 MPa and 60 oC, and leaves at 6 MPa and 450 oC with a velocity of 80 m/s. Calculate the volumetric flow rate of air at the inlet of the tube in m3/s

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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