Isisindo ethize

Mhlawumbe hhayi abafundi abangakaze ezwa inkinga elandelayo: "Yikuphi okulula - ikhilogremu fluff noma amakhilogramu izitini?". Into ukwazi kakhulu wukuthi, naphezu umbhedo nangamazwi, eziningi kakhulu ahileleke agumenti engenamsebenzi. Lapho kwakukhona isabelo umkhuba nomphakathi - ayaziwa, kodwa kungenziwa bazitshela ukuthi ukuhlolwa idatha isisindo lezinto ezizungezile esekelwe ukuqhathanisa izici ngobuningi kuyaziwa njengoba isikhathi Archimedes. izici ezithile ziqondwa ukuba isimo sengqondo sabanye lamanani kulinganiswa, isibonelo, isisindo nevolumu. Bala inani G yi isilinganiso:

G = P / V, kanye nesilinganiso iyunithi SI - n / imitha cubic.

Isisindo - isilinganiso gravity eMhlabeni, futhi amandla adonsela phansi ethize ngenxa yaleso sizathu isici ngokomzimba izinto, ngoba incike indawo izilinganiso. Kuyini ukuba? Khumbula ukuthi P isisindo - iyona okudonsa amandla emkhakheni sici, esingekho kuwo lihlotshaniswa izici inertial izidakamizwa mass m, ngo ukusheshisa mahhala ukuwa g. Ngakolunye uhlangothi, g - vacillates futhi kuncike, kuhlanganise, futhi kusukela izixhumanisi ezindawo. Njengoba kuqala umthetho P = m * g Newton uhlale elivumelekile, kungenzeka ukuba baphethe ngokuthi kokuhlukana isisindo ngesikhathi esifanayo ne ushintsho kule ukusheshisa okudonsa izinto.

Inchazelo yakudala: "I share - iyona isilinganiso esisindo ukuba umthamo yayo." Nokho, lokhu lula amanga eyinkimbinkimbi ngempela eningi - isicelo engalungile amayunithi kwaholela ekutheni izikhulu zibonise ukudideka we imiqondo emayelana isisindo futhi umzimba isisindo. Njengoba yaziwa, uhlelo mass iyunithi (SI) uyalingana 1 kg, futhi ibutho kulesi simiso, ngokomthetho Newton, ke ulinganiswa newtons, futhi 1H = 0,102 kg * 9.8 m / umzuzwana. sq.

Ukuze izicelo eziningi lobuchwepheshe Newton amandla iyunithi Kuthi esingesihle, ngakho ngisho waqhubeka ukwakha entsha nesilinganiso uhlelo - okudonsa ohlelweni imethrikhi. It siqanjwe amayunithi okuxubile zokulinganisa: imitha - kgf - yesibili. Yini eyenza? It lula ukusetshenziswa amayunithi kwamandla empilweni yangempela ngenxa inkulumo efanayo kwamanani ka isisindo ethize kanye gravity ethize, okusho kwabantu izinhlelo ezahlukene, inqobo nje uma g ukusheshisa kuyinto njalo noma azinakwa.

Isidingo ukusebenzisa isisindo ethize amangalelwe impahla ukuhlonza ubuchwepheshe, ekutholweni ukungcola isakhiwo sabo noma porosity.

indlela owaziwa sokunquma isampula zegolide, ukuminyana amagugu izakhiwo, njll Indlela eyisisekelo yokulinganisa gravity ethize esekelwe displacement embodiments ahlukahlukene: esisindo kukalwa futhi, ngokucwiliswa emanzini, umthamo yayo, kanye nokulinganisela kuthiwa - imishini ibhizinisi. Ikakhulukazi ngendlela ephumelelayo ukusetshenziswa idatha etholwe ngale ndlela, ekuhloleni izinsimbi kanye Alloys yabo. Ngokuvamile, i-priori eyaziwa Ingxenye ngesisindo sezinti lensimbi izakhiwo kahle wafunda. ungubani yabo nenkambiso ezintsha isethwe ngezindlela eziningi, kodwa baqale isifundo yokulinganisa gravity ethize.

Lolu ketshezi esetshenziswa ngokuvamile amanzi, kodwa yizilinganiso ukunemba okuphezulu linikeza ukuzinza eliphezulu nemingcele yangaphandle - lokushisa nokucindezelwa. Ngezinye izikhathi, isibonelo, ekuhloleni amber for manga usebenzisa ketshezi okhethekile nge isisindo ezithile ezingaphezu kuka-2 g / cc.

amandla adonsela phansi ethize kwaba isici esiyisisekelo kwezobuchwepheshe isicelo yezimboni uketshezi kazibuthe. Fine-kaphalafini slurry ne ferroporoshkom ivumela kazibuthe udale kalula uketshezi nge kwenombolo elawulwa noma preassigned gravity ethize. Ukuze uthole lezo zinqubo phezu kokucetshiswa ehlombe ka imikhando polymetallic kanye nezinye izinto eziningi eziningi ukungcola, okuyinto izingqimba zihlukaniswe ukuphakama okugeza flotation ngokuhambisana esiqinile nge amandla awo kumuntu othile. Kungenzeka ukuthi i-ezinjalo imvelo ore lokuhlomulisa ubuchwepheshe - ikusasa eliqhakazile.