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.
Hydrocarbons that contain rings or double bonds are called unsaturated hydrocarbons, which are the opposite of saturated hydrocarbons. Alkanes-such as cyclohexane, which is an important precursor to nylon-that contain rings of carbon atoms are unsaturated. Another example of a hydrocarbon is ethylene.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.