Energy can not be created or destroyed, but transferred and transformed into other forms of energy is stated in…
A The Law of Conservation of Matter
B The Law of Conservation of Energy
C The Law of Energy and Motion
D The Law of Thermodynamics
The correct answer and explanation is:
The correct answer is B. The Law of Conservation of Energy.
The Law of Conservation of Energy states that energy cannot be created or destroyed; it can only be transferred from one form to another or transformed into a different kind of energy. This principle is one of the fundamental concepts in physics and applies to all processes in nature.
When energy changes form, such as when chemical energy in food is converted into mechanical energy in the body, or when electrical energy is converted into light and heat in a light bulb, the total energy remains constant. In any closed system, the energy before and after the transformation is the same. However, energy may be lost in the form of heat or other less useful forms, which is why, for example, no machine can operate at 100% efficiency—some energy always dissipates.
This law was first articulated in the 19th century as part of the work of scientists like James Joule and Hermann von Helmholtz. It forms the basis of thermodynamics, which is the study of heat and energy flow.
The Law of Conservation of Energy is crucial in various fields of science and engineering, including mechanical engineering, chemistry, and even biology. In biology, for instance, organisms rely on the transfer of energy from food sources to sustain their metabolic functions. Similarly, in physics, energy conservation is used to understand everything from the motion of planets to the operation of engines and electrical circuits.
The principle is also closely tied to the First Law of Thermodynamics, which elaborates on the idea that the total energy in an isolated system remains constant. Understanding this law allows us to calculate energy changes in various systems and design more efficient energy-use processes.