Energy

Energy

Energy in physics is defined as the capacity for doing work. Cool scientist bros have and explained the concepts of energy through a series of laws.

The first concept is the conservation of energy, which states that the total energy from an isolated system remains constant, it is conserved over time, meaning that energy can neither be created nor destroyed, but rather transferred or transformed from one form to another.

Energy can be transferred through either heat or work.

A heat transfer occurs due to a difference in temperature where a warmer object transfers energy into a colder object.

Energy transfer through work occurs when an object is moved over a distance by an external force.

This is also known as the First Law of Thermodynamics, which states: A system may exchange energy with the surroundings by heat flow or work.

 

Energy takes different forms, notably potential, kinetic, thermal, electrical, chemical, and nuclear. All of forms of energy are also associated with motion.

 

Internal energy is the concept of movement in of atoms or molecules in an object, or energy associated with the random, disordered motion of molecules. The internal potential energy of an object rises when the object switches state of matter, so when an object transitions from a solid to a liquid, or a liquid to a gas. When the temperature rises, the random, disordered motion of molecules in an object speeds up as well, which means the internal kinetic energy rises upon rise in temperature too.

 

Energy quality is the term we use for how easy or difficult it is to transfer the energy in an object from one form to another.

A high quality energy form has low entropy, meaning it can thus be converted into other forms of energy with efficiency, for example electric energy.

Low quality energy is normally a form of energy which isn’t concentrated, meaning the energy becomes dispersed and disorderly, meaning it has less of an ability to be utilized for only taking care of simple tasks. Heat is an example of low quality energy, because a lot of it becomes wasted into the surroundings, whereas electric energy is a high quality form of energy, since it can be concentrated efficiently.