Determine the amount of thermal energy that must be transferred to a copper wire (mass 20g) to increase its temperature from 25.0°C to its melting point (1085.0 °C). Note: The specific heat of
copper is 385 J/Kg. C.

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Two technicians are discussing a starter that clicks repeatedly when the key is turned to the crank position. technician a says the solenoid hold-in winding is open. technician b says the solenoid pull-in winding is open. who is correct?

Cuso4 is__ an acid a base a salt