Cooling water flows through the tube of a condenser at such a rate that the inside film coefficient is 1300 btu/hr-sq ft f. the tube has an ok of 0.875 in. and a well thickness of 0.0375 in. the thermal conductivity of the tube metal is 64.0 btu/hr ft f. steam condenses on the outside of the tube with a film coefficient of 2000 btu/hr-sq ft f. what’s the overall film coefficient based on the outside tube diameter?

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.

Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan