Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Nzvimbo yakaita senyika inopa muenzaniso uri nyore. Nzvimbo ipi neipi iri pamusoro inogona kurondedzerwa namapfundo maviri: nzvimbo yepachikamu uye nzvimbo yakareba. Kusiyana neCartesian coordinates ye ndege, misiyano ye coordinate haina kufanana nemisiyano iri pamusoro, sezvakaratidzwa mumufananidzo uri kurudyi: kune mumwe munhu ari pa equator, achifamba madhigirii 30 ehurefu kumadokero (magenta line) inoenderana nerwendo rwemakiromita anenge 3,300 (2,100 mi), nepo kune mumwe munhu ari pa latitude ye 55 degrees, achifamba madhigirii 30 ehurefu kumadokero (blue line) anofukidza chinhambwe chemakiromita 1,900 chete (1,200 mi). Nokudaro magadzirirwo haagoveri mashoko akakwana okurondedzera geometry yedenga renzvimbo, kana kuti chaizvoizvo geometry yeimwe nzvimbo yakaoma kunzwisisa kana kuti nzvimbo-nguva. Mashoko iwayo ndiwo chaiwo akanyorwa mu metric, iyo iri basa rinorondedzerwa panzvimbo imwe neimwe yepasi (kana nzvimbo, kana nguva-nzvimbo) uye rinobatanidza misiyano yehurongwa nemisiyano iri kure. Zvimwe zvinhu zvose zvinofarirwa mu geometry, zvakadai sokureba kwechikamu chipi nechipi chakapiwa, kana kuti kukona uko makona maviri anosangana, anogona kuverengwa kubva pairi metric function. Basa re metric uye chiyero charo chekuchinja kubva pane imwe nzvimbo kuenda kune imwe inogona kushandiswa kutsanangura huwandu hwe geometric inonzi Riemann curvature tensor, iyo inotsanangura chaizvo kuti nzvimbo kana nzvimbo-nguva yakakomberedzwa sei pane imwe nzvimbo. Muzvinyorwa zvechigarire, metric neRiemann curvature tensor zviyero zvinotsanangurwa panzvimbo imwe neimwe mu spacetime. Sezvambotaurwa kare, zvinhu zviri muchadenga-nguva zvinorondedzera chimwe chitsama, simba<unk>momentum tensor T, uye nheyo yokuti "chadenga-nguva chinoudza chinhu kuti chifambe sei, uye chinhu chinoudza chadenga-nguva kuti chigumbuke sei" zvinoreva kuti zvinhu izvi zvinofanira kuva zvine chokuita nomumwe nomumwe. Einstein akagadzira ukama uhwu achishandisa Riemann curvature tensor uye metric kutsanangura imwe geometrical uwandu G, zvino inonzi Einstein tensor, iyo inorondedzera zvimwe zvinhu nzira nzvimbo-nguva iri curved....  Mubvunzo: Rudzii rwenzvimbo yakapfava isingagoni kurondedzerwa kupfurikidza nokushandisa mafundo?
yakatenderera