A 3-phase transformer is assembled by connecting three 85-kVA, 110kV/15kV, single-phase transformers. The primary is connected in delta and the secondary is connected in Y. 1) Draw the winding arrangements of the 3-phase transformer 2) Determine the nominal voltages and power rating of the 3-phase transformer.

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.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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