The cone shaped part on top of the

The Law of the
Conservation of Energy states that the total energy of an isolated system
remains constant and cannot be created or destroyed, it can only be transformed
from one form to another. This means that the chemical energy within the
firework before it ignites must be equal to the total remaining in it after it
explodes, adding the energy released at light, heat, movement and sound. The Law
of the Conservation of Momentum states that in an isolated system, the total
momentum of the object before the explosion is equal to the total momentum of
the object after the explosion. Due to this, as seen in many images of fireworks,
explosions (fireworks) are always symmetrical. If one part of the firework
explodes to the left, the explosion must be exactly balanced by an explosion to
the right. Therefore aerial fireworks must be composed of parts that are made
especially to ensure maximum efficiency and safety upon exploding. A firework
is composed of five main parts, namely the stick (tail), the fuse, the charge
(motor), the effect and the head. The stick, usually made from wood of plastic,
ensures that the firework shoots in a straight line with accuracy and precision
and doesn’t shoot in a random direction causing serious injury. The fuse,
consisting of a piece of paper or fabric, is the element that is lit with a
match in order to ignite the firework. In complex public displays the fuses are
lit by electrical contacts called wirebridge fuseheads which allows the
firework to be ignited from a considerable distance away, insuring safety. The
charge, usually made up of tightly packed, coarse explosive gunpowder, is a
relatively simple explosive designed to blast a firework several hundred meters
into the sky to ensure the explosion takes place far away from the ground in
order to prevent injury from the explosion. The effect, made up of a loosely
packed, finer explosive which make up small, individual, colourful explosions,
is the part of the firework that causes the spectacular explosions you can see
safely high in the air. The head is the cone shaped part on top of the firework
designed to ensure the firework is more aerodynamic and improve the probability
of the firework to shoot in a straight line. All five parts work together in
order to ensure that the firework shoots up in a straight line and explodes
only when the firework has been launched into the sky, several hundred meters
away in order to ensure maximum efficiency and safety.