The collision between two gas molecules or billiard balls can be approximated as elastic collisions. Elastic collisions are exchanges of kinetic energy between two bodies having different reference frames in which the total kinetic energy of the two bodies after collision is equal to the energy before collision.Know More
Elastic collisions only occur when there is no form of energy conversion. Kinetic energy exchanged between the colliding bodies or imparted by the moving body to the stationary one, without any other forms, are produced. Colliding billiard balls lose energy to friction with the surface on approach and to sound, heat and compression at impact. The magnitudes of energy relative to the total kinetic energy are extremely small and can be ignored in principle, allowing the approximation of the collision between the balls to tend to the perfectly elastic case for simplicity.
For extremely small colliding particles, these exchange energies cannot be ignored. On approach, the kinetic energy of two colliding gas molecules is converted into repulsive, potential energy resulting from their dispersional and columbic interactions. This repulsion is then converted back into kinetic energy, with some loss of linear momentum in the form of angular momentum. Collisions between atoms or subatomic particles are perfectly elastic, because the linear and angular energies are conserved in each collision.Learn more about Thermodynamics
Polyethylene, polypropylene, polyvinyl chloride, polystyrene, polybenzimidazole, acrylic, nylon and Teflon are examples of thermoplastics. Thermo-softening plastic, or thermoplastic, becomes soft and flexible at a certain temperatures and solidifies on cooling.Full Answer >
Examples of reversible changes include melting chocolate and changing it back into a solid by cooling it, and melting candle wax by heating it and solidifying the wax by cooling it. Reversible changes are changes that can be reversed. They are also known as physical changes.Full Answer >
Energy transformation is the change of energy from one form to another. For example, a ball dropped from a height is an example of a change of energy from potential to kinetic energy.Full Answer >
Some examples of radiant energy are visible light, infrared and ultraviolet electromagnetic waves, radio waves and microwaves, and radiant energy's uses include heating, lighting and communications. All radiant energy is a form of electromagnetic radiation and its primary source is the sun, but it can also be produced by manmade methods. Radiant energy can be viewed as either a stream of photons or as an oscillating electromagnetic wave carrying energy in its changing magnetic and electrical fields.Full Answer >