A 48.6 kg ice skater is moving at 2.61 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then
moves in a circle of radius 0.718 m around the
pole.
Find the force exerted by the rope on her
arms. The acceleration of gravity is 9.8 m/s
2
.
Answer in units of kN.

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

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).

Which describes increasing the efficiency of energy resource