Propagation of electromagnetic wave is a basic subject that studies the propagation phenomena and laws of electromagnetic waves in the earth environment and the sun-earth environme
Feb 24, 2022
Ammonium perchlorate is an inorganic compound with the chemical formula NH4ClO4, which is a white crystalline powder with deliquescence. Ammonium perchlorate is a strong oxidant an
Feb 23, 2022
oxygen difluoride Properties Oxygen in oxygen difluoride has an unusual +2 oxidation state and is extremely oxidizing, but it is not as active as elemental fluorine. Pure oxygen di
Single group liquid propellant refers to a liquid propellant that provides energy and working fluid through self-decomposition or self-combustion. It is stable in the storage envir
Feb 22, 2022
The attitude control engine is mainly used for attitude control of the final stage of launch vehicles, missile warheads and various spacecraft. This type of engine is also sometime
Double base propellant is a homogeneous propellant composed of nitrocellulose and polyol nitrate as the basic energy components. It has the advantages of uniform composition, small
Feb 21, 2022
Solid propellant is a kind of energy-containing composite material with specific properties. It is the power source of various solid motors of missiles and space vehicles. It is th
The transition temperature is the critical temperature. There are two types of transition temperatures for polymer materials, namely the crystalline melting temperature Tm and the
Feb 20, 2022
The Dutch physicist Zeeman discovered in 1896 that when the light source that generates the spectrum is placed in a strong enough magnetic field, the magnetic field acts on the lum
The atomic magnetic moment is the effective part of the sum of the various magnetic moments inside the atom. The magnetic moment of the atom is the source of the magnetism of the m
Feb 19, 2022
Magnetically ordered matter in the absence of an external magnetic field, due to the exchange of electrons or other interactions between neighboring atoms, the magnetic moments of
Mechanism of Catalytic Hydrogenation The hydrogen molecules adsorbed on the catalyst generate active hydrogen atoms and add to alkenes and alkynes whose bonds are weakened by the c
Feb 18, 2022
