Energy

This is an article about the many different types of energy.

Energy

Part 1: What Is Energy?

 

Before Questions:

1.     List the different types of energy.

2.     What is energy?

Energy is the ability to do work. However, this is very vague. Energy can be described as anything that will have a gravitational effect. It is a common idea that there are many types of energy. However, there are only 2, but each has many subdivisions. Here is a list below to give you an idea what I mean.

Division 1: Kinetic

·        Kinetic

·        Electromagnetic Radiation (EMR)

Division 2: Tensional

·        Mass

·        Potential (Attraction)

Yes, I know that this list seems very small. It could also all fall under the mass category, so really all of energy is mass. We will start off with kinetic.

          Kinetic energy is the energy of motion, or energy changing location. The formula for finding how much kinetic energy something has is as follows: F=MA, where A=acceleration in meters per second per second, F=force in newtons, and M=mass in kilograms. However, once an object has accelerated, the energy will be measured joules instead of newtons. They are quite similar, but newtons are acceleration/force and joules are work.

          An example for this would look like this. A block of wood weighing 2 kilograms is acted on by a force of 2 meters/second each second (2m/s^2). The force acts on it for 2 seconds. In these 2 seconds, the block will have accelerated a total of 4m/s^2. Now, we can see how many joules of kinetic energy it has. To find joules, you need to know what speed it will be going at. If it accelerated at 4 meters per second per second for a second, then it will now have a speed of 4 meters per second. So, there is 2 kilograms going at 4 meters per second, or 2kg*4m/s If a joule of force is equal to kg*m/s, then the block would have 8 joules of force.

          Electromagnetic radiation is a particle that moves at the speed of light. They all have different wavelengths and frequencies. Photons are small particles with no mass, but they have an electromagnetic charge and kinetic energy from moving kinetic energy. Photons aren’t measured in joules, but instead electron volts. However, most of the time things should be converted to joules, because it has become a standard of most scientific measures of energy (besides mass). There are approximately 6.2414*10^18 electron volts in a joule.

0
Liked it
2 Responses to “Energy”
  1. ceegirl Says...

    On February 11, 2011 at 10:24 pm

    Thanks for sharing.


  2. Ima Vee Says...

    On February 11, 2011 at 11:22 pm

    interesting…very informative one…


Post Comment
comments powered by Disqus