(d) The student calculated the specific heat capacity of aluminium to be 2390 J/kg "c.
The 'true' specific heat capacity of aluminium is 900 J/kg °C.
Suggest why the student's result for aluminium is different from the 'true' value.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

The speed of light can be used to measure the

Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).