Sunday, November 17, 2013

Potential and Kinetic Energy

      Hey everybody, I'm back again with a new blog post and this one a bit different from the rest. I think that it's time to move on from the elements and matter and its states. It's time to talk about energy! In this new post, I will be talking about potential and kinetic energy and how they keep things  moving.   
 
      To understand potential and kinetic energy, we must understand what energy is. Energy in a nut shell is the thing that makes other things happen. An example of this is when you kick a soccer ball, the soccer ball moves and does not stay in the same position that it was in before you kicked it. Most of the time, you can't see energy. Energy also can't be created or destroyed, but it can be transferred or stored by an object. A quick fact: the Earth's main source of energy is the sun.

 
messi photo: GIF - Messi goal vs Athletic animation.gif

 
 
      Now that we have touched base on what energy is, let's talk about potential and kinetic energy. Potential energy is the energy an object has due to its position, shape, and the condition of the object. Kinetic energy on the other hand is the energy an object has due to its motion. The amount of kinetic energy depends on the object's speed and mass.



 

 
      This all may be a little bit hard to understand, so I will give you a real life example to help you take in all this information. There is a five foot book shelf with two books on the shelf. One book on the shelf weighs one pound, and the other book weighs two pounds. The book that weighs two pounds has more potential energy because it has more mass, which means that it will have more kinetic energy if the book would leave its potential state. Now that we have the books on the shelf, let's see what happens when we bring them down.
 
 
 
      Now that we know that the books have the potential energy, let's say that a person were to bump right into the book shelf. The books would then fall off the shelf and land on the floor. This is an example of kinetic energy, but let's make things a bit more interesting. Let's say that one book hit a lamp as it crashed to the ground and the lamp fell over. When that happened, the kinetic energy from the book was transferred to the lamp. Kinetic energy can be transferred from one object to another when the two objects collide. This same transfer of kinetic energy can be seen when a bowling ball hits the pins and knocks them over.
 
bowling strike photo: Strike strike_bowling.jpg

 
 
      Thanks for reading the post. Please leave a comment in the comment section down below.
 
 

 



Sunday, November 10, 2013

Matter Changes States

      Hey viewers I'm back again with a new post. Sorry I have not posted anything new in some time, but I'm back and I will talk about something new today. Also, I'll be going back to my talks about matter again. Have you ever thought about why matter changes states, or how it does, or you just need a refresher course in the subject? Well, I will answer all these questions in this new post.

     
 
 
      As we should all know, matter is anything that has mass and that takes up space. You are made up of matter, the room you are in is made of matter, and yes, the device you are using to view my blog is also made of matter too. Now that we got that out of the way, lets talk about the three basic states of matter. The three basic states of matter are solid, liquid and gas. Each are unique, but all have one thing in common. Let's first talk about the differences of the three states. First, a solid has a definite shape and definite volume, and an example of a solid is ice. All solids have a melting point, which is the temperature that a solid becomes a liquid. Ice's melting point is 33 degrees F. The next state of matter is a liquid. A liquid does not have a definite shape, but it does have a definite volume. Water is an example  of liquid and is the most abundant liquid on Earth. The last one is gas, and gases do not have a definite shape or volume. An example of a gas is carbon dioxide. Even though these states of matter seem very different, they all have one thing in common. They all still keep the same chemical properties of the substance, and an example of this is water.

      Now that we know the three basic states of matter, let's talk about how a substance changes states. Substances can change states by adding or taking away heat and pressure from a substance, but adding or taking away heat or pressure will not change the substance's chemical properties. I believe that we all know what melting, freezing, and vaporization is, but you may not have heard of sublimation, condensation, deposition, and the heat of vaporization. Instead of telling you all this, I have a great video for you about this subject, and the image right below will also be of great use to you.
 
 
 
 
      Thanks for reading my blog. Please leave a comment in the comment section down below.