Autoignition
The compression ratio of an internal-combustion engine, or an IC engine as it is more commonly called, is the ratio of the volume the highest capacity of the combustion chamber to its lowest capacity. In the IC engine, the piston makes a stroke, resulting in the compression of the air in the combustion chamber - the ratio between the volume of the cylinder and combustion chamber when the piston is at the bottom of its stroke, and the volume of the combustion chamber when the piston is at the top of its stroke, is the compression ratio.
In science class you will have to do a project using combustion
Compression ratio simply means the difference in size of the original vs compressed unit. Compression ratio is a commonly used term for internal combustion engine piston/cylinder compression and file compression. Ratios differ depending on the type of engine or the type of file being compressed. In file compression, 7zip has the highest compression ratio.
It is most commonly used to prevent or control excessive bleeding following childbirth and spontaneous or elective abortion, and also to aid in expulsion of retained products of conception after a miscarriage.
People spontaneously combusting is a myth. No member of the Church of Jesus Christ of Latter-day Saints (commonly called the "Mormon" Church) has ever spontaneously combusted.
Another name for burning is combustion. The term combustion is more commonly used in scientific fields like chemistry and physics.
In building constructions most commonly, that is top member of truss.
Compression or commonly called a longitudinal wave.
Incomplete combustion is most commonly caused by lack of oxygen. Partial oxidation can lead to many contaminants being released into the environment.
You're talking about an engine compression brake, commonly referred to as a Jake Brake.
Natural gas, petrol, wood, candles, (etc.) and all other commonly known combustion reactions can NOT be reversed. (Thats a pity, though!)
Abortion is the medical term meaning sponaneous or induced termination of pregnancy. What is commonly known as a miscarriage is called a spontaneous abortion in medical terminology. An induced abortion is commonly called an abortion in lay language.