Sis ntawm Nuclear radiations nrog teeb meem

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 fusion reactions neutrons and other particles together with certain radiations are emitted from the nucleus. Moreover interaction of high energy particles *natural or artificial* with matter produce certain nuclear or atomic reactions with the emission of particles like protons,Deuteronomy,neutrons and ionizing radiations Read more [...]

Hluav taws xob cov Xab seev thiab nws cov hluav taws xob hom

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 of small currents of the order of micro amperes or millionaires the voltmeter of potentiate for the measurements of potential difference (or voltage) between two points of a cur-cit or the emf of a source the ammeter for the measurements of large currents the Wheatstone bridge the meter Read more [...]

Roj av Engineering thiab nws,s txhais thiab qhia rau

Petroleum and it,s definition and introduction... 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 some inorganic compounds therefore it is called crude oil. Crude oil is drilled out from the soil and carried to oil refineries by means of oil tanker and pipelines. It is fraction ally distilled. Gasoline or petrol is a mixture of hexane(C6H14).since the demand of Read more [...]

Homologous series and characteristics of homologous series

Homologous series and characteristics of homologous series Definition; Series of organic compounds which have same functional group, similar structural feature but differ from each other by integer number of CH2(methylene group) is called "Homologous series". The number of homologous series differs by molecular mass 14. Characteristics of Homologous series: 1. All numbers of homologous series have similar structures. 2. Physical properties of homologous series change progressively more than Read more [...]

poly Manu | Merious Part | Unit Molecule |polymerization

poly Manu,merious ib feem los yog chav tsev los yog molecule,polymerization linking ntawm ntau molecules. Cov txheej txheem nyob rau hauv uas organic tebchaw uas muaj ob bonds los yog triple bonds yauv tshuaj cov tshuaj tiv thaiv nyob rau hauv xws li ib tug txoj kev uas loj tus naj npawb ntawm me me molecules koom ua ke rau daim ntawv loj loj heev molecules me me molecules ntxiv ua ke yog hu ua monomers thiab lawv tsim loj molecules hu ua polymers thiab qhov no tag nrho tshwm sim yog lub npe hu ua "polymerization". Hom ntawm polymerization: Nws muaj ob hom ntawm polymerization. 1.addition Read more [...]

Yuav ua li cas Pair Koj Laptop mus rau ib tug Bluetooth Mobile Connect

Koj xav kom muab koj laptop ntaus ntawv mus rau ib tug Bluetooth mobile txuas. Xws li Bluetooth yog me ntsis zoo li WiFi nyob rau hauv uas tso cai rau koj txuas li lwm leej lwm tus tsis tau xwm muab lawv kuj yog ib tug cable. Ua ntej koj yuav laptop thiab kuj mobile. Saib qhov no pic. Mus cuag ib tug Bluetooth ntaus ntawv mus rau koj lub PC uas koj yuav tsum pair nws thawj thiab mus rau qhov chaw povhaum. Koj laptop tsis siv neeg nrhiav ib tug bluetooth ntaus ntawv. Bluetooth pab kiag li lawm yuav qhia tom qab ib tug luv luv tos. Now this tab show in your laptop Read more [...]

Yuav ua li cas mus cuag Internet nyob rau hauv computer thiab laptop High tswv yim zoo tshaj

Yuav ua li cas mus cuag internet nyob rau hauv computer thiab laptop. Ua ntej koj yuav computer thiab koj xav qhia qhov wifi internet thiab txuas lub wifi internet. Nws tau thawj lub computer siv wifi internet ib USB muab tso rau hauv koj lub computer ces qhia koj lub computer WIFI internet. Kuv tag nrho qhia koj yuav ua li cas rau hauv internet txuas rau lub computer thiab laptop. Tam sim no koj xav kom koj lub laptop siv WIFI internet. Laptop twb putted lub USB rau hauv system. Thawj nias desktop icon nyob rau hauv lub sij hawm sab. You click to connect and put Read more [...]