Ukwehla kweMagnetic

Ukuhla kweMagnetic on Earth

Xa sithetha ngazo Ukwehla kwamandla kazibuthe Ngalo naliphi na ixesha eMhlabeni sithetha nge-engile phakathi kwendawo yasenyakatho yamagnetic kunye ne-geographic north. Indawo esemantla yaziwa ngegama lasentla. Ukwehla kwamandla kazibuthe kuphawula umahluko phakathi komhlaba ongasentla kunye nalowo uboniswe yikhampasi, engumazibuthe wasentla.

Kule nqaku siza kukuxelela zonke iimpawu kunye nokuba yeyiphi imisebenzi eyehlayo ngemagneti.

Iimpawu eziphambili

Ukubalwa kokuhla kwamandla kazibuthe

Ukwehla kweMagnetic akusoloko kuzinzile kwiplanethi yethu. Kuxhomekeka ekubeni siphi, ixabiso loku lingahluka. Ngaphaya koko, ngenxa yentshukumo ejikelezayo kunye notoliko lomhlaba kunye nefuthe le-nutation, eli xabiso lokuncipha kwemagnethi likwatshintsha ngokuhamba kwexesha. Singathi eli gama isinceda ukuba sixolele ukungavumelani okukhoyo phakathi kweemodeli zezona zinto zibalulekileyo kunye nenyani. Inokusinceda ukuba sifumane umbono malunga nemida yempazamo kunye neempazamo zokubala ezikhoyo kwiinkqubo zokulinganisa ezinengqondo.

Ixesha lokwehla kwemagnethi alicebisi ukuba kunokubakho iiyantlukwano ezingalindelekanga kwii-axes zokudibanisa. Sinokufumana iindlela ezahlukeneyo zokujonga izinto, iijografi ezikhutshiwe zaza zahlengahlengiswa kwaye amanye amathuba okuphanda.

Kukho iqela lophando kunye nemveliso esele yakhiwe ngoku kwaye yenziwe ngamagcisa abonakalayo, abagcini bezinto kunye neororists umsebenzi wazo uyinxalenye yokwazisa ngezifundo ezahlukeneyo zasemva kwenkqubo yobukoloniyali kunye nolawulo lwedoloniyali ngokufutshane. Eli qela lophando libizwa ngokuba kukuncipha kwemagnethi.

Isebenza njani iMagnetic Declination

Ipali yasemantla ngemagnethi

Ukuba sifuna ukwazi ukuba isebenza njani le nto kwiplanethi yethu, kuya kufuneka sazi ukuba yintoni le Imagnethi yomhlaba. Iplanethi yoMhlaba inentsimi enemagneti ngenxa yobume bomhlaba. Olunye umhlaba luqulathe ikakhulu isinyithi kunye nenickel. Ezi zitye zinzima zikwimeko yolwelo olungenamanzi kumbindi wangaphandle woMhlaba. Oku kungenxa yokwanda kwamaqondo obushushu kubunzulu noxinzelelo oluphezulu apho ezi ntsimbi zinyibilikisiweyo kunye namatye afunyanwa khona.

Enkosi ngokuhamba okukhoyo phakathi koxinano lwezixhobo embindini womhlaba kukho ekuthiwa kuko Ukuhanjiswa kwemisinga. Le mibhobho yokuhanjiswa kwengubo yilezo zibangela ukuhamba kwamacwecwe e-tectonic kunye nezo zikhuthaza ukuhamba kwelizwekazi. Ukongeza, zingunobangela womhlaba womazibuthe.

Njengokuba ubunzima bezinyithi obunzima buhamba ngokuqhubekayo, kwenziwa imisinga eyahlukeneyo yombane eyenzeka ngaxeshanye nentshukumo kwaye ivelise intsimi yombane. Oku kwenza ukuba uMhlaba usebenze njengomazibuthe omkhulu kwaye uneepali ezimbini zemagnethi: ipali yasemantla kunye nepali esemazantsi. Ukuba sithetha ngombono wemagnethi, ipali esemantla isemazantsi kwaye ikufutshane nendawo esemazantsi. Kwelinye icala, ipali esemazantsi eshukumayo ikufuphi kwipali yasemantla yendawo. Le meko yeepali ezahlukeneyo zemagnethi kwiplanethi yethu yiyo ethethelela ukuba ipali esemantla yenaliti yekhampasi enomazibuthe yalatha kumantla endawo. Indawo ezibekwe kuyo iipali zemagneti ayihambelani ncam naleyo yeepali zejografi. Ukuba kuyinyani ukuba basondele kakhulu kubo nangona bengagcini ndawo. Esi sikhundla siyahluka ngokweminyaka inikwe iintshukumo ezahlukeneyo zomhlaba.

Ukuma komhlaba kunye nemagneti esemantla

Indawo esemantla yindawo eyaziwayo ngegama lasentla. Ihambelana kunye ne-axis yokujikeleza komhlaba kwaye yeyona ichazayo kwi: indlela edibana nomphezulu womhlaba. Kwelinye icala sinendawo yomhlaba ekumantla kwaye kwelinye icala isibonda sendawo esisezantsi.

Xa sithetha ngemagnethi sinokuthi umazibuthe wasemantla omazantsi uchazwa ngala magnethi apho zikhomba khona iikhampasi. Indawo emi kuyo le ntsika yemagnethi yomantla ayihambelani naleyo isemantla kwaye ihambe iminyaka. Kuba kukho izifundo kunye neengxelo malunga nokuma kwale magnetic field, kuyaziwa ukuba indawo leyo yahlukile malunga neekhilomitha ezili-1100 ukusuka ngenkulungwane yama-XNUMX. Okungakumbi okanye ngaphantsi kuyaziwa ukuba unyaka ngamnye umazibuthe wasenyakatho otshintsha indawo yawo malunga neekhilomitha ezingama-60.

Okwangoku ipali yasemantla ngemagnethi ikumgama oziikhilomitha ezili-1600 ukusuka kwipali yomhlaba esemantla. Ime kumantla mpuma Canada kwaye iya eRashiya. Akufanele sikhohlwe ukuba ngokungqongqo ngemagnethi yipali yasemazantsi.

Ukubaluleka kokuhla kwamandla kazibuthe

Imagnethi yomhlaba

Yimbombo yenqwelomoya ethe tyaba eyenziwe ngasemantla omazibuthe kunye nomntla wejografi. Le engile, apho ihambisa khona umazibuthe osemantla minyaka le iya kunika amaxabiso ayo. Ayisiyiyo kuphela iminyaka kodwa kunye nendawo esikuyo. Esinye sezizathu zokuba iitshathi ze-nautical zinexabiso elithile kungenxa yokuba kukho ukonyuka okanye ukwehla kwexabiso lokwehla kwamandla kazibuthe kuxhomekeke kwindawo esikuyo.

Ukuze sazi ixabiso lokuncipha kwemagnethi kufuneka sazi ukuba, ukuba umazibuthe wasemantla ubekwe ngasekunene kwenyani yenyani, ukuhla kwemagnethi kulungile. Kwelinye icala, ukuba umazibuthe wasemantla ubekwe ngasekhohlo kwenyani yenyani, ukuncipha kwemagnethi kuya kuba nexabiso elibi. Yile ndlela xa sihlalutya iitshathi ze-nautical esinokufumana amaxabiso esangqa esiphumeleleyo phakathi kwe-0 kunye ne-360 degrees kwaye oko kubonisa ixabiso lokwehla kwamandla kazibuthe kunyaka wohlelo lwetshathi echaziweyo. Ukongeza, ihlala ibonisa ixabiso lokwahluka minyaka le kokuhla kwemagnethi njengomsebenzi wokuhamba kwepali yamantla emagnethi.

Ukuba siphindaphinda umahluko wonyaka wokwehla kwamandla kazibuthe ngeminyaka ephuma kuhlobo lwetshathi kude kube namhlanje, sinokuba nexabiso elichanekileyo lokwehla kwamandla kazibuthe. Ngale ndlela, akukho mfuneko yokuba unyaka nonyaka kufuneka sithenge itshathi entsha yolwandle.

Ndiyathemba ukuba olu lwazi ungafunda ngakumbi malunga nokwehla kwamandla kazibuthe.


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