The operation of a solenoid is similar to a relay, but where a relay uses a magnetic field to close an electrical circuit, a solenoid uses a magnetic field to create movement and, in the case of a starter solenoid, to also close electrical contacts

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.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

The higher the astm grain size number, the finer the gran is. a)-true b)-false