3. in 1989, michel menin of france walked on a tightrope suspended under a
balloon nearly at an altitude of 3150 m above the ground. suppose a coin falls
from menin's pocket during his walk. how high above the ground is the coin
when its speed is 40 m/s?

does anyone know the answer ?

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).