You are 2.4 from a plane mirror, and you would like to take a picture of yourself in the mirror. you need to manually adjust the focus of the camera by dialing in the distance to what you are photographing. what distance do you dial in?
a. 1.2 m
b. 2.4 m
c. 3.6 m
d. 4.8 m

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).