Heat Tutorial

Sorry for being late on the post. I should have posted this post yesterday. Before I start I am happy to inform you that I will be opening up my new website after I raise enough money to buy a domain name since I am poor :(. School for me just ended so did final exams so I am completely free from any distractions. So here I go:

Today we will learn about Heat. First of all what is heat? Heat is the transfer of energy from a body with a higher temperature to a body with a lower temperature. Heat is considered in this definition to be a verb and is often confused with thermal energy, which is what makes things "hot". Heat is completely outlined in the four laws of thermodynamics which are:

0th law: "If system A and system B are in thermal equilibrium with system C, systems A and B must be in thermal equilibrium with each other." (thermal equilibrium pretty much means that the two systems have equal temperatures)
1st law: The internal energy of a system always stays constant. This is an addition to the law of conservation of energy that states that energy cannot be created nor destroyed in the universe as a whole. In a specific system, there is always energy that is going in and out of the system, thus making the law of conservation of energy very broad accompanying the entire universe.
2nd law: The entropy in an isolated system that is not in thermal equilibrium is constantly increasing. Entropy refers to the disorder of molecules of a system.
3rd law: The temperature absolute zero is not possible anywhere in the universe. This is true because there would constantly be a transfer of heat to objects. Absolute zero was never reached in history but scientists were very close using special refrigerators, reaching a decimal of a kelvin above zero.

In this unit only two formulas are needed:
Quantity of heat = mass * specific heat capacity * change in temperature
Using the bolded letters into units the heat formula is created: Q = mcΔT
The second formula is much more simple:
Q(in)=Q(out)
This formula says that in a system that is in thermal equilibrium, the amount of heat that left the system is equivalent to the amount of heat that entered the system reconnecting the thermal equilibrium.
The post tomorrow will have an example question that might appear on an AP Physics test.