The pool chair is so hot because it gained the transferred heat energy from the sunshine's radiation of electromagnetic waves casting upon the chair all day long. Heat energy is the sum of the kinetic and potential energy of all the molecules in an object, therefore increasing the temperature of which measures the average value of the kinetic energy of molecules in random motion, traveling by vibrating. The plastic material of the chair is a conductor, easily allowing the heat energy to pass throughout it with its qualities of an even surface, solid infrastructure, and obtaining a great amount of density with its solid state of matter. Since molecules are tightly compacted together, once it comes in initial contact with the heat energy it will quickly travel through vibrating movements of the molecules within the material, increasing the temperature of the object faster and by a larger degree. Lets find someways we can test the transfer of thermal energy out!
Ow! Why is this pool chair so hot? It burnt me! All I wanted was for today to be a relaxing pool day!
I am getting pretty hungry for lunch, how about frying an egg? Informative and nutritious!
That is a great idea! As I place the egg on the chair it immediately increases in temperature due to the transfer of heat from one object to another, cooking the egg into a delicious meal. This transfer of thermal energy is called conduction. Conduction is the transfer of thermal energy by collisions between molecules in matter. As you can see this is what is occurring to the egg currently. The thermal energy from the increased temperature due to the radiation is transferring its temperature and heat energy to an object with a cooler surface. Heat is attracted to objects with cooler temperatures, therefore instantaneously heating the egg up. How do you prefer your eggs?
Next, I am going to bring outside a pot of water with its matching lid. I am going to place it upon the chair and witness the water heat up. While the source of the heating of the water is conduction, there is another way how the water all becomes steamed. This method is called convection, and it is the transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place. This creates a continuous cycle of the rising of the warm water and the sinking of the cooler water as it intertwines, contributing to the transfer of heat within its own fluid.
Wow, I learned so much today! I wonder what other forms of conduction, convection, and radiation is utilized in our regular life without us acknowledging the transfer of heat energy. Next time I see one of these examples of thermal energy transfer I will be sure to point it out. Thank you!