What is ∑f2x, the sum of the x components of the forces acting on block 2? take forces acting up the incline to be positive. express your answer in terms of some or all of the variables tension t, m2, the magnitude of the acceleration of gravity g, and θ.

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

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).

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?