Two vinyl balloons, each having the same charge are separated by a distance 0.41 m. The balloons exert a repulsive force of magnitude 2.23 N on each other at this distance. Calculate the magnitude of charge on each balloon Give your answer in microcoulombs.

The air that we breath is made mostly of which gaseous molecule

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

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).