1.) a.) If 1 km = 1,000 m and 1 m = 1,000 mm, Convert 2.0 x 10⁶ mm into the equivalent value in km.

b.) There are 1,760 yards in a mile and 0.621 miles in 1 km. If you sprinted the equivalent of 20 football fields (each 100 yrds long), how many miles did you sprint?

c.) If there are 1.609 km in a mile, convert 135 miles/hour into meters per second. (There are 1000 m in a kilometer.)

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).