Different Types of Energy

OH YEAH. Energy.
Makes me think of Dragon Ball Z and YEAHHHHHH.
I LIKE.
ENERGY.
BECAUSE IT'S ENERGY.
Ok. So I gotta blog about the six different types of energy. And here they are.

First type is chemical energy. As the name suggests, it's the energy of chemicals. To be more specific, the atoms of covalent bonds are held together by chemical energy. When these chemicals react, it either releases or absorbs heat. They are called exothermic and endothermic, respectively.
Second is gravitational potential energy. This is the energy that increases due to its position in gravitational field.
Another is elastic potential energy. This is energy from deformation of elastic objects, such as springs. This force is equal to the work done on the spring to stretch it.
Mechanical energy has two types: potential and kinetic. Mechanical kinetic energy is the energy of motion on an object through applied force.
Thermal energy is the kinetic energy of the atoms and molecules' random movements.
Lastly, sound energy is the energy caused by vibrations of atoms through mechanical energy, not resulting in any chemical change.

Cannons

http://www.youtube.com/watch?v=bSdHUOBNm68
Is it bad if that's the first thing that came into my mind when the teacher said we were gonna make a cannon?

So we were to make a cannon out of 5 pop cans. Three for nuzzle, two for base, and a pair of styrofoam cups for a projectile. It'll be fueled by ethanol. Our goal was to make the projectile travel as far as possible.

http://hyperphysics.phy-astr.gsu.edu/hbase/traj.html
According to this site, projectiles travel farthest at 45 degrees, assuming there's nothing in the way.

We also learned that according to Newton's Law, acceleration = force/mass, so we'd want to make the cannon heavy as possible if we don't want it to fly away when we launch it.