The Law of Conservation of Energy | Forms of Energy
208.6 هزار بار بازدید -
6 سال پیش
-
The law of conservation of
The law of conservation of energy is FASCINATING! Especially when you understand the different forms of energy and how they react!
Now onto the topic at hand, the conservation of energy, and energy in general.
So the law of the conservation of energy states that, in a closed system, that is, a system that isolated from its surroundings, the total energy of the system is conserved. Or, more loosely stated, energy cannot be created or destroyed, only transferred or transformed. This is also known as the first law of thermodynamics.
So what do I mean by cannot be created or destroyed. If a bomb explodes its creating energy right? And when a rolling ball stops rolling its energy must have been destroyed! Well, no. Because energy cannot be created or destroyed, only transferred or transformed.
Let’s talk a little more about energy. The SI unit for energy is the joule named after James Prescott Joule and there are different forms of energy. I’m going to discuss five.
#1 is Kinetic energy. This is the energy of motion. Any object that is moving through space has kinetic energy. This includes a ball thrown through the air, a swimming fish, and a flying space shuttle.
#2 is Potential energy. This is the energy an object has the potential due to its position with respect to some reference point. So, a book set on a shelf has potential energy because it has the potential to fall. A ball at the top of a hill also has potential energy because it can roll down. In both cases the potential energy would be transformed to kinetic energy.
#3 Chemical energy. This is the energy stored in chemical bonds and released through chemical reactions. The bomb example is not energy being created, but energy being transformed from chemical energy to thermal energy. Solar energy is is transformed into chemical through photosynthesis, so the energy from the sun is literally being stored in chemical bonds within the plants.
#4 Electrical energy. This energy due to the separation of charges and flow of electrons, called an electrical current. All your household appliances use electrical energy and convert it to kinetic energy to move the blades of a blender of thermal energy to toast your bread. It is also the energy stored in batteries.
And Finally #5 Thermal energy. This energy is given off as heat. When you start a campfire, you are breaking chemical bonds in the wood and transferring the chemical energy to thermal energy. Friction is another example. When a ball is rolling across the ground there is friction between the ball and the ground and this friction converts kinetic energy into thermal energy. That’s why you can warm up your hands by rubbing them together.
So those are the five types of energy you should be familiar with, there are others, but those are the main ones. All those examples illustrate the conservation of energy. Energy cannot be created or destroyed.
I hope this video helped you and that you enjoyed seeing my face. Be sure to if you’re not a subscriber you should do so now and check out my other videos.
If you have any additional questions feel free to throw them in the comment. I’ll catch you next time.
Now onto the topic at hand, the conservation of energy, and energy in general.
So the law of the conservation of energy states that, in a closed system, that is, a system that isolated from its surroundings, the total energy of the system is conserved. Or, more loosely stated, energy cannot be created or destroyed, only transferred or transformed. This is also known as the first law of thermodynamics.
So what do I mean by cannot be created or destroyed. If a bomb explodes its creating energy right? And when a rolling ball stops rolling its energy must have been destroyed! Well, no. Because energy cannot be created or destroyed, only transferred or transformed.
Let’s talk a little more about energy. The SI unit for energy is the joule named after James Prescott Joule and there are different forms of energy. I’m going to discuss five.
#1 is Kinetic energy. This is the energy of motion. Any object that is moving through space has kinetic energy. This includes a ball thrown through the air, a swimming fish, and a flying space shuttle.
#2 is Potential energy. This is the energy an object has the potential due to its position with respect to some reference point. So, a book set on a shelf has potential energy because it has the potential to fall. A ball at the top of a hill also has potential energy because it can roll down. In both cases the potential energy would be transformed to kinetic energy.
#3 Chemical energy. This is the energy stored in chemical bonds and released through chemical reactions. The bomb example is not energy being created, but energy being transformed from chemical energy to thermal energy. Solar energy is is transformed into chemical through photosynthesis, so the energy from the sun is literally being stored in chemical bonds within the plants.
#4 Electrical energy. This energy due to the separation of charges and flow of electrons, called an electrical current. All your household appliances use electrical energy and convert it to kinetic energy to move the blades of a blender of thermal energy to toast your bread. It is also the energy stored in batteries.
And Finally #5 Thermal energy. This energy is given off as heat. When you start a campfire, you are breaking chemical bonds in the wood and transferring the chemical energy to thermal energy. Friction is another example. When a ball is rolling across the ground there is friction between the ball and the ground and this friction converts kinetic energy into thermal energy. That’s why you can warm up your hands by rubbing them together.
So those are the five types of energy you should be familiar with, there are others, but those are the main ones. All those examples illustrate the conservation of energy. Energy cannot be created or destroyed.
I hope this video helped you and that you enjoyed seeing my face. Be sure to if you’re not a subscriber you should do so now and check out my other videos.
If you have any additional questions feel free to throw them in the comment. I’ll catch you next time.
6 سال پیش
در تاریخ 1397/04/07 منتشر شده
است.
208,676
بـار بازدید شده