10. What is the unit used for energy? Do Watt D Nenton D ft-b De Joule

The correct answer is D. Joule.<br /><br />The unit used for energy is the Joule (symbol: J). The Joule is the standard unit of energy in the International System of Units (SI). It is defined as the amount of work done when a force of one newton is applied over a distance of one meter. The Joule is also the unit of work and heat in the SI system.<br /><br />The other options are not the correct units for energy:<br /><br />A. Watt is the unit of power, which is the rate of energy transfer or conversion.<br />B. Nenton is not a recognized unit of energy.<br />C. ft-b (foot-pound) is a unit of work or energy, but it is not the standard SI unit.<br /><br />Therefore, the correct answer is D. Joule.