Nancy would like to find out how air temperature affects the rate of evaporation of water. Which of the following tools should Nancy include in her experiment’s design?
A.
stopwatch and forceps
B.
thermometer and graduated cylinder
C.
meter stick and balance
D.
spring scale and hand lens

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).