 Hello and welcome back to another episode of Physics Partner. Today we are going to be delving into an exciting and fundamental concept in thermodynamics, the first law of thermodynamics. We will be exploring what is the first law, how it works and most importantly how it applies in our daily lives. So let's get started. Let's explore what is the first law of thermodynamics. The first law of thermodynamics is also known as the law of conservation of energy, essentially it states that energy cannot be created or destroyed only transferred or transformed from one form to another. This law forms the foundation of thermodynamics which is the branch of physics that studies the relationship between heat, energy and work. In simpler terms, the first law tells us that we can never get something for nothing. All the energy we use comes from somewhere. How does the first law of thermodynamics work? Now let's say we have a system. Let's say it's a gas in a container. The first law tells us that the change in internal energy of the system is equal to the heat added to the system plus the work done on the system. This is commonly written as delta U is equal to Q minus W. Where delta U is change in internal energy, Q is the heat added and W is the work done by the system. In other words, the change in the energy of the system is equal to the energy that puts in minus the energy that taken out. Let's talk about the real life application of the first law. So how does all of this apply in real life? Well, one of the most obvious examples is in heat engines. Heat engines are devices that use heat to do work such as a car engine or a power plant. The first law tells us that the energy input in the form of heat must equal to the energy output which is in the form of work. This is why cars and power plants are designed to be as efficient as possible. Any wasted energy means less work has been done. Another example is in home heating and cooling. The first law tells us that when we heat a room or cool it down, we are not actually creating energy. Instead, we are simply transferring energy from one place to another place. This is why it is important to have a well insulated home as it helps to prevent the transfer of energy from the inside to the outside and vice versa. By using energy efficient heating and cooling system, we can also reduce the amount of energy needed to maintain a comfortable temperature in our homes. Understanding the law of thermodynamics can help us make informed decisions about how we use energy and how we can reduce or impact on the environment. So I think it's enough for today. So thank you very much for listening and watching. I hope you enjoyed the video. I hope this video is useful for you. So take care of yourself and don't hesitate to write an email if you have any questions, curies, suggestions and even classes are required. Take care of yourself. Meanwhile, see you in the next video. Goodbye.