How far will 350 joules raise a 7kg mass? can you explain the formula used.

When an object gets raised to a higher place, it gets potential energy.
The energy has to come from whatever motor or person is lifting it.

The amount of potential energy it has is

   (mass of the object) x (acceleration of gravity) x (how far it gets lifted).

If the object has 7 kg of mass, and you have 350 joules of energy
to lift it with, then

       Potential energy at the top = 350 joules

              350 joules = (7 kg) x (gravity) x (height)

                             =  (7 kg) x (9.8 m/s²) x (height)

             (350 joules) / (7 kg x 9.8 m/s²)  =  height

               Height = (350) / (7 x 9.8)    (kg-m²/s²)  /  (kg-m/s²)

                         =    5.1 meters

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

The cell reaction uses external supplies of a full and an oxidant, which are consumed and needs to be provided continuously. the cell will continue to provide electrical energy so long as there is a supply of fuel and oxidant.  hope this ! (: