Simply by observing the existence of the Cherenkov radiation from a particle, one can determine its relative velocity with respect to the light speed in medium. Knowing that, one can determine the particle momentum.
It is a ring formed carbon skeleton. The smallest possible cyclic hydrocarbon is cyclopropane (triangular C3H6) together with cyclobutane both being rather unstable (degration to linear propene and 1-butene). Five and six membered rings are quite common.
Methane is a saturated hydrocarbon. Saturated hydrocarbons are hydrocarbons that contain no rings and contain only single bonds between the different atoms. Methane is the simplest hydrocarbon because it contains only one carbon atom.ydrocarbons with carbon-carbon double bonds are called alkenes. Hydrocarbons with carbon-carbon triple bonds are called alkynes. And hydrocarbons that contain rings of carbon atoms that are joined by alternating single and double bonds are called aromatic.