Ubunzima obuthile

Mhlawumbi ukuba abafundi abo bangevanga le ngxaki zilandelayo: "Yiyiphi na lula - a Kilo of Lutho okanye kilogram izitena?". Eyona nto kakhulu ukwazi kukuba, nangona bububhanxa ngomlomo, abaninzi kakhulu bawela ingxabano engenamsebenzi. Xa kukho isabelo kulo mkhuba zentlalo - ayaziwa, kodwa oko kuthathwa ukuba uvavanyo lwe data ubunzima bezinto ezibangqongileyo ngokusekelwe uthelekiso iimpawu zazo bulk kuye kwaziwa ukususela ngexesha kaArchimedes. iimpawu ezithile ziqondwa ukuba sengqondo ezinye amaxabiso kulinganiswa, umzekelo, ubunzima kunye nomthamo. Bala inani lwe G yi-ratio:

G = P / V, kwaye iyunithi zemilinganiselo SI - / n cubic meter.

Weight - umlinganiselo womxhuzulane koMhlaba, nondiliseko ezithile ngenxa yeso sizathu akukho luphawu ngokwasemzimbeni kwezinto, ekubeni kuxhomekeke kwindawo ngokwemilinganiso. Yintoni na le nto? Khumbula ukuba P ubunzima - ungamandla intsimi omxhuzulane iimpawu, nto leyo ehambisana ezineempawu inertial kweziyobisi mass m, ngenxa ukukhawulezisa of ukuwa g. Kwelinye icala, g - vacillates kwaye luxhomekeke, kuquka, kwaye ukusuka ezihambelanayo obume. Ukususela Newton wokuqala umthetho P = m * g usoloko esebenzayo, kunokwenzeka ukuba ukugqiba ukuba Ukwahluka sobunzima ngexesha elinye kunye notshintsho kukukhawuleziswa omxhuzulane.

Le nkcazelo classic ngu: "Isabelo - lulwahlulo kakhulu emzimbeni ukuya umthamo wayo." Noko ke, le lula ubuxoki entsonkothileyo kakhulu enkulu - iiyunithi isicelo engachanekanga kwakhokelela babuphakathi iikhonsepthi enxulumene ubunzima kunye nomzimba weight. Njengoko yaziwa, iyunithi inkqubo ubunzima (SI) ilingana no-1 kg, kwaye amandla kule nkqubo, ngokomthetho Newton, oko ulinganiswa newtons, kunye 1H = 0,102 kg * 9.8 m / umzuzwana. macala onke.

Kuba izicelo ezininzi zobugcisa unit newton mandla ngandlel ebaphazamisayo, kangangokuba wada waya ukudala inkqubo womlinganiselo entsha - inkqubo omxhuzulane metric. Kuye yakhiwa kwiiyunithi ezahlukeneyo zemilinganiselo: imitha - kgf - yesibini. Yini eyenza? Lwenza lula nokusetyenziswa kweeyunithi amandla ebomini ngenxa ibinzana elifanayo ngamanani ubunzima ethile nondiliseko ethile, ie ukungaqini kwiinkqubo ezahlukeneyo, ngaphandle kokuba unikezelo g oqhubekayo okanye okungenamsebenzi.

Imfuneko yokusebenzisa ubunzima ethile ibango technology yokuchonga eziphathekayo, ukuqingqwa ubumdaka kubume okanye porosity.

Kakuhle eyaziwa indlela yokuqingqa isampuli yegolide, ingxinano GEMS izakhiwo, njl Indlela esisiseko sokukala ubunzulu ezithile ngokusekelwe ukubana abantu embodiments ezahlukeneyo: ubunzima bomzimba lulinganiselwa kwaye, ngokuntywiliselwa emanzini, umthamo wayo, kwaye intsalela kuthiwa - izixhobo zoshishino. Eyona ndlela iphumelela ukusetyenziswa kwedatha afunyenwe ngale ndlela, kolu phando lwesinyithi kunye aluminium zabo. Ngokuqhelekileyo, a priori eyaziwa inani ngokobunzima yentsimbi iipropati kakuhle efunda. bangoobani ngemizekelo amatsha ngeendlela ezininzi, kodwa uqale isifundo yokulinganisa bekukubi ethile.

Ulwelo esetyenziswayo jikelele ngamanzi, kodwa imilinganiselo okuchaneka ephezulu inika uzinzo eliphezulu parameters zangaphandle - lobushushu kunye noxinzelelo. Ngamanye amaxesha, umzekelo, xa isifundo evuthiweyo ukuba ukuqhatha usebenzisa ulwelo ezizodwa ubunzima ethile ezingaphezu kwe-2 g / cc.

bekukubi ethile isiqalelo zeteknoloji ezisisiseko kwisicelo woshishino iziselo ngemagnethi. Fine-separafini oluludaka kunye ferroporoshkom ivumela imagnethi ukwenza lula ulwelo nge variable elawulwa okanye womxhuzulane ethile abacelwayo ngaphambi kwexesha. Kuba inkqubo enjalo emagxeni ukutyebiseka ekrwada polymetallic kunye nezinye izinto ezininzi a lot of ubumdaka, leyo Ingaphandle ezahlulwe kubude webhate ayinto ngokuhambelana ngqongqo amandla awo ngabanye ezithile. Kusenokwenzeka ukuba loo ore indalo iteknoloji inzuzo - nekamva eliqaqambileyo.