The diesel engine (also known as a compression-ignition) and named after Rudolf.
Diesel, is an internal oil engine in which ignition of the fuel (injected into the
combustion chamber) is caused by hot air in the cylinder created by the mechanical
compression from a piston.
Diesel engines work by compressing only the air. This increases the air temperature.
inside the cylinder to such a high degree that atomized (a fine mist) diesel fuel that is
injected into the combustion chamber ignites spontaneously. This contrasts with spark ignition engines such as the gasoline engine, which use a spark plug to ignite an air fuel mixture. In diesel engines, glow plugs (combustion chamber pre-warmers) may be
used to aid starting in cold weather, or when the engine uses a lower compression-ratio,
or both.
A mousetrap is a specialized type of animal trap designed primarily to catch mice;
however, it may also (intentionally or unintentionally) trap other small animals.
Mousetraps are usually set in an indoor location where there is a suspected infestation
of rodents. Larger traps are designed to catch other species of animals, such as rats,
squirrels, other small rodents, or other animals.
Radio is the technology of using radio waves to carry information, such as sound, by
systematically modulating properties of electromagnetic energy waves transmitted
through space, such as their amplitude, frequency, phase, or pulse width.
When radio waves strike an electrical conductor, the oscillating fields induce an
alternating current in the conductor. The information in the waves can be extracted and
transformed back into its original form.
A semi-automatic shotgun is a kind of gun. It fires one shotgun shell every time the
trigger is pulled. Most shotguns, such as pump-action shotguns, lever action shotguns,
and break barrel shotguns, use no energy from the last fired shell to load the next one.
A person using a semi-automatic shotgun has to load the first shell themselves. The rest
of the shells are loaded by the gun using part of the energy used to fire each shell.
Lesson Learning 