技术

核辐射与物质的相互作用

In the previous chapter we have discussed natural radioactivity in which a and B particles and y-rays are emitted from the disintegrating nucleus of an atom. In nuclear fission and […]

INTRODUCTION :- for the detection or measurement of electric current potential difference, and resistance certain instruments have been devised viz the galvanometer for the detection of small currents or measurements […]

Petroleum and it,的定义和介绍… Latin petra =rock,oleum=oil means sock oil. It is usually found below the surface of earth.it is viscous liquid and mixture of alkane,alkene,cycloalkane,aromatic hydrocarbons and […]