Which statement accurately describes objects viewed through a single convex lens

a. things look the same size but appear farther away than they actually are
b. things look smaller than they actually are
c. things look larger than they actually are
d. things look the same size but appear closer than they actually are

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).