Chimwe chezvinhu zvakakosha zvechinhu i density, inozivikanwawo se kuwandanya. Izwi rinotonhorera nderekuti density. Density inhamba yehukuru nehukuru hwechinhu. Panyaya yemasvomhu, zvakanyorwa kuti:
ρ = m/V
(ρ verenga "rho") ibhii rechiGiriki rinowanzo shandiswa kuratidza density, m zvinoreva huremu uye V zvinoreva vhoriyamu.
Sisitimu yepasi rose yemayuniti kuwanda makirogiramu pa cubic mita (kg/m2)3). Kune mayuniti eCGS, kureva masendimita, magiramu, nemasekonzi, density unit inoratidzwa mumagiramu pa cubic centimeter (gr/cm3).
Inotevera i data rehuwandu hwezvinhu zvakati wandei.
Kuwanda kwechinhu chataurwa mutafura iri pamusoro apa ndiko kuwanda kwechinhu patembiricha ye0o C uye kumanikidzwa kwe1 atm (atm = chikamu chekumanikidzwa)
Kuwanda kwemhepo nemvura
Kuwanda kwemvura kwakasiyana nekuwanda kwechinhu chakasimba. Simbi kana huni dzine huwandu hwakafanana muzvikamu zvese. Izvi zvakasiyana nemvura, senge mhepo kana mvura. Mhepo yakakwira pamusoro pegungwa, huwandu hwayo hunowedzera kuderera. Izvi zvinodaro nekuti simba regiravhiti rinoderera nekukwirira. Kana ukakwira, simba regiravhiti rishoma, saka huwandu hwemhepo inodhonzwa hunodererawo. Huwandu hwemhepo iri pedyo negungwa hwakakura kupfuura huwandu hwemhepo iri pamusoro pegomo. Munzvimbo imwe chete kana huwandu, mhepo iri pedyo negungwa ine huwandu hwakawanda uye nekudaro huwandu hwakawanda. Kusiyana neizvi, mhepo iri pamusoro pegomo ine huwandu hudiki uye nekudaro huwandu hushoma. Kana iri kure negungwa, huwandu hwemhepo hunowedzera kuderera.
Zvakadini nekuwanda kwemvura, semuenzaniso mvura yegungwa? Mhepo inoumbwa nemaatomu kana mamorekuru akasiyana, anofambiswa, saka huwandu hwemhepo hunokanganiswa zvikuru nesimba resimba rinokwevera pairi. Kusiyana neizvi, mamorekuru emvura haamire ega uye haana kuparadzaniswa; anobatanidzwa pamwe chete uye haafambi nyore nyore. Nokudaro, huwandu hwemamorekuru emvura pamusoro pegungwa hauna kusiyana zvakanyanya nehuwandu hwemamorekuru emvura pasi pegungwa. Saka kuwanda kwemvura yegungwa pamusoro pegungwa kwakafanana nekuwanda kwemvura yegungwa pasi pegungwa, kunyangwe kukwirira kwakasiyana.
Mhedzisiro yekuchinja kwetembiricha uye huwandu pahuwandu hwemvura
Chinhu chimwe nechimwe chinokura (vhoriyamu inowedzera) kana tembiricha yacho ikawedzera uye ichidzika (vhoriyamu inoderera) kana tembiricha yayo ikaderera. Kunze kwemvura patembiricha ye0 o C–4 o C. Mienzaniso inotevera inotsanangura izvi. Wakambosangana nechiitiko here apo vhiri remudhudhudhu rakamiswa rakati sandara kunyangwe pasina kubuda mvura? Vhiri remudhudhudhu rakati sandara nekuti vhoriyamu yemhepo mukati mevhiri yakadzikira. Vhiri yemhepo yakadzikira nekuti tembiricha yemhepo yakadzikira. Izvi zvinoitika kana tembiricha yemhepo yatonhora zvikuru. Mumwe muenzaniso. Ndokumbirawo ufuridze bharumu rerabha kusvika rakura wobva wasunga muromo webharumu kuitira kuti mhepo isabude. Omesa bharumu panzvimbo inopisa. Tarisa zvinoitika kubharumu! Bharumu richaputika nekuti vhoriyamu yemhepo iri mukati mebharumu inowedzera nekuda kwekuwedzera kwetembiricha yemhepo. Kusimba kwerabha hakugone kumira kukura kwemhepo saka bharumu rinoputika.
Mienzaniso miviri iri pamusoro inoratidza kuti huwandu hwemvura, ingava mvura kana gasi, hunogona kuchinja kana tembiricha yayo ikachinja. Huremu hwemhepo iri mukati mevhiri rakavharwa kana bharumu hunoramba hwakafanana; huwandu chete ndihwo hunochinja. Kuchinja kwehuwandu kunoita kuti huwandu hwemhepo huchinje.
