When the air conditioning system is operating all of the following happens inside the evaporator, EXCEPT:
O
O
O
ano
O
the refrigerant removes heat from the outside air,
the refrigerant changes from a vapor to a liquid.
heat entering the refrigerant causes it to change state.
the refrigerant absorbs heat.

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.

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