Which kind of wind is most likely responsible for the movement of this weather system from Dallas to St. Louis and then to Pittsburgh?
O A. Trade winds
B. Westerlies
C. Southern polar easterlies
O D. Northern polar easterlies
pls answer fast

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

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).