Indlela yokuthola mass?

Iningi lethu esikoleni lazibuza lo mbuzo: "Indlela yokuthola ubuningi bomzimba"? Manje sizozama ukuphendula lo mbuzo.

Ukuzimisela kobukhulu ngokusebenzisa umthamo wayo

Ake sithi unawo umgqomo ngamalitha angamakhulu amabili. Uhlose ukuyigcwalisa ngokugcwele nge-diesel fuel oyisebenzisayo ukushisa indlu yakho encane yokubilisa. Ungathola kanjani ubukhulu balo mgodi ogcwele idizili? Ake sizame ukuxazulula lo msebenzi olula ekuqaleni kokubuka nawe.

Sombulula inkinga yokuthola ubuningi bezindaba ngomsindo wayo, kalula. Ukuze wenze lokhu, sebenzisa ifomula ngobuningi bezindaba

P = m / v,

Kuphi i-isib.

M ubukhulu bayo;

Ivolumu ye-V.

Njengoba isisindo sobukhulu, amagremu, kilogram kanye namathani kuzosetshenziswa. Izinyathelo zamanani: amasentimitha cubic, decimeters namamitha. Ubuningi obucacile buzobalwa ngo-kg / dm³, kg / m³, g / cm³, t / m³.

Ngakho-ke, ngokuhambisana nemibandela yenkinga, sinalo umgqomo onomthamo wamalitha angamakhulu amabili. Lokhu kusho ukuthi ivolumu yayo ingu-2 m³.

Kodwa ufuna ukufunda ukuthi ungathola kanjani ubukhulu. Kusukela kumthetho ongenhla ususelwe kanje:

M = p * v

Okokuqala kudingeka sithole inani le-p-specific fuel of diesel. Ungathola le nzuzo usebenzisa uhla lwemibhalo.

Encwadini sithola ukuthi p = 860.0 kg / m³.

Khona-ke sishintsha lezi zindinganiso kwifomula:

M = 860 * 2 = 1720.0 (kg)

Ngakho, impendulo yombuzo ukuthi ungathola kanjani ubukhulu itholakele. Amakhilogremu amathani amabili namashumi ayisikhombisa namashumi amabili isisindo samalitha angamakhulu amabili e-diesel fuel. Khona-ke ungakwazi nje ukwenza ukulinganisa okulinganiselwe kwesisindo esiphelele somgqomo kanye nomthamo we-rack ngaphansi komgqomo onobha.

Ukuzimisela kokukhulu ngobukhulu kanye nevolumu

Ngokuvamile kakhulu emisebenzini ewusizo e-physics, ungathola ubuningi obuningi njengobuningi, ubuningi nevolumu. Ukuze uxazulule le nkinga, ukuthi ungathola kanjani umzimba womzimba, udinga ukwazi ivolumu nobuningi bayo.

Izinto ozodinga:

1) Roulette.

2) Isibalo (ikhompyutha).

3) Amandla okukala.

4) uMbusi.

Kuyaziwa ukuthi izinto ezinamanani alinganayo, kodwa ezenziwe ngezinto ezihlukahlukene, zizoba nobukhulu obuhlukile (isibonelo, insimbi kanye nohlaka). Izixuku zemizimba eyenziwe ngezinto ezithile (ngaphandle kwe-voids) zilingana ngokuqondile nomthamo wezinto ezibuzwayo. Uma kungenjalo, okuqhubekayo yisilinganiso sobukhulu kuya kwezinto eziningi. Le nkomba ibizwa ngokuthi "ubukhulu bendaba". Sizoyiveza ngencwadi d.

Manje sidinga ukuxazulula inkinga yokuthola ubukhulu ngokuhambisana nefomula d = m / V, lapho

M ubukhulu bento (ngo-kilogram),

Ivolumu yayo (ngamamitha ayi-cubic).

Ngakho-ke, ubukhulu bezindaba ubukhulu beyunithi yevolumu yayo.

Uma udinga ukuthola ubuningi bezinto okuvela kuyo into, kufanele usebenzise ithebula lensiza, elitholakala encwadini ejwayelekile kumasiksiki.

Umthamo wento ubalwa ngefomula V = h * S, kuphi

V - ivolumu (m³),

H - ukuphakama kwento (m),

S yindawo engaphansi kwento (m²).

Uma kwenzeka ungakwazi ukukala ngokucacile imingcele yejometri yomzimba, kufanele usebenzise usizo lwemithetho ka-Archimedes. Ukwenza lokhu, uzodinga umkhumbi onesikali esisebenzela ukulinganisa ivolumu yotshwala bese uphonsa into emanzini, okungukuthi, emkhunjini okhona kuwo. Umthamo lapho okuqukethwe komkhumbi kuzokwanda khona umthamo womzimba ongena kuwo.

Ukwazi ivolumu V ne-d yesisindo sento, ungakwazi ukuthola kalula umthamo wayo ngefomula m = d * V. Ngaphambi kokubala ubuningi, kuyadingeka ukuba ulethe wonke ama unit wokulinganisa ohlelweni olulodwa, isibonelo, ohlelweni lwe-SI, oluyisistimu yokulinganisa umhlaba jikelele.

Ngokuhambisana namafomula angenhla, lesi siphetho esilandelayo singadonsela: ukuthola inani elidingekayo elikhulu elidingekayo ngevolumu eyaziwayo nobukhulu obuningi, kuyadingeka ukuba kwandiswe inani lobuningi bezinto ezivela kuwo umzimba ngomthamo womzimba.