The unit of energy is the Joule.
Its the exact amount without loosing any in the process. This process is called "The Law of Conservation of Energy".
Power is energy divided by time. Solving for energy, energy is power multiplied by time. Work is closely related to energy - work is the amount of energy transferred.
No, those are different units. Both are units of energy, however. The recommended unit is the joule, or multiples such as kJ, etc. - that's the international unit for energy.
Work and energy use the same units; but the term "work" is used in the sense of "transfer of energy" (amount of energy transferred).
A Joule is a derived unit of energy, work, or amount of heat in the International System of Units. It contains no water.
Quantum
Work is transfer of energy, so it has the same units as energy. Power is the amount of energy transferred per unit time, so it does not have the same units of energy. Rather, its units are energy/time.
Mechanical work is the amount of energy transferred by a force. Like energy, it is a scalar quantity, with SI units of joules.
50 units
Electrical energy is measured in the same units as any other type of energy, namely joules. The amount of energy PER UNIT CHARGE is measured in volt.
Less than 1000, in any case, since some energy is lost. The exact amount lost varies from case to case.
If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.If you refer to the units, energy is measured in joules.