Question

the first law of thermodynamics states that energy can't be created or destroyed. if people can't create energy, where do we get energy to do the work

Answer 1

people can get chemical energy from food (carbohydrates) 

Answer 2

Answer: By transforming energy from one type to another.

Step-by-step explanation:

Energy is not destroyed, it is conserved. During a thermodynamic process, it is transformed from one type to another. The first law expresses a system energy balance. Energy flows in a system (work and heat) are related to changes in system Energy. Thus the first law of thermodynamics says: "The sum of the heat exchanged by a system and the work done by or in a system is equal to the variation of the internal energy of that system."